Smartphones are a class of mobile phones and of multi-purpose mobile computing devices. They are distinguished from feature phones by their stronger hardware capabilities and extensive mobile operating systems, which facilitate wider software, internet (including web browsing over mobile broadband), and multimedia functionality (including music, video, cameras, and gaming), alongside core phone functions such as voice calls and text messaging. Smartphones typically include various sensors that can be leveraged by their software, such as a magnetometer, proximity sensors, barometer, gyroscope and accelerometer, and support wireless communications protocols such as Bluetooth, Wi-Fi, and satellite navigation.
Early smartphones were marketed primarily towards the enterprise market, attempting to bridge the functionality of standalone personal digital assistant (PDA) devices with support for cellular telephony, but were limited by their battery life, bulky form, and the immaturity of wireless data services. In the 2000s, BlackBerry, Nokia's Symbian platform, and Windows Mobile began to gain market traction, with models often featuring QWERTY keyboards or resistive touchscreen input, and emphasizing access to push email and wireless internet. Since the unveiling of the iPhone in 2007, the majority of smartphones have featured thin, slate-like form factors, with large, capacitive screens with support for multi-touch gestures rather than physical keyboards, and offer the ability for users to download or purchase additional applications from a centralized store, and use cloud storage and synchronization, virtual assistants, as well as mobile payment services.
Improved hardware and faster wireless communication (due to standards such as LTE) have bolstered the growth of the smartphone industry. In the third quarter of 2012, one billion smartphones were in use worldwide. Global smartphone sales surpassed the sales figures for feature phones in early 2013.
- 1 History
- 2 Hardware
- 3 Software
- 4 Sales
- 5 Use
- 6 See also
- 7 References
- 8 External links
The first commercially available device that could be properly referred to as a "smartphone" began as a prototype called "Angler" developed by Frank Canova in 1992 while at IBM and demonstrated in November of that year at the COMDEX computer industry trade show. A refined version was marketed to consumers in 1994 by BellSouth under the name Simon Personal Communicator. In addition to placing and receiving cellular calls, the touchscreen-equipped Simon could send and receive faxes and emails. It included an address book, calendar, appointment scheduler, calculator, world time clock, and notepad, as well as other visionary mobile applications such as maps, stock reports and news. The term "smart phone" or "smartphone" was not coined until a year after the introduction of the Simon, appearing in print as early as 1995, describing AT&T's PhoneWriter Communicator.[non-primary source needed]
Beginning in the mid-late 1990s, many people who had mobile phones carried a separate dedicated PDA device, running early versions of operating systems such as Palm OS, Newton OS, Symbian or Windows CE/Pocket PC. These operating systems would later evolve into early mobile operating systems. Most of the "smartphones" in this era were hybrid devices that combined these existing familiar PDA OSes with basic phone hardware. The results were devices that were bulkier than either dedicated mobile phones or PDAs, but allowed a limited amount of cellular Internet access. The trend at the time, however, that manufacturers competed on in both mobile phones and PDAs was to make devices smaller and slimmer. The bulk of these smartphones combined with their high cost and expensive data plans, plus other drawbacks such as expansion limitations and decreased battery life compared to separate standalone devices, generally limited their popularity to "early adopters" and business users who needed portable connectivity.
In March 1996, Hewlett-Packard released the OmniGo 700LX, a modified HP 200LX palmtop PC with a Nokia 2110 mobile phone piggybacked onto it and ROM-based software to support it. It had a 640×200 resolution CGA compatible four-shade gray-scale LCD screen and could be used to place and receive calls, and to create and receive text messages, emails and faxes. It was also 100% DOS 5.0 compatible, allowing it to run thousands of existing software titles, including early versions of Windows.
In August 1996, Nokia released the Nokia 9000 Communicator, a digital cellular PDA based on the Nokia 2110 with an integrated system based on the PEN/GEOS 3.0 operating system from Geoworks. The two components were attached by a hinge in what became known as a clamshell design, with the display above and a physical QWERTY keyboard below. The PDA provided e-mail; calendar, address book, calculator and notebook applications; text-based Web browsing; and could send and receive faxes. When closed, the device could be used as a digital cellular telephone.
Subsequent landmark devices included:
- The Ericsson R380 (2000) by Ericsson Mobile Communications. The first device marketed as a "smartphone", it was the first Symbian-based phone, with PDA functionality and limited Web browsing on a resistive touchscreen utilizing a stylus. Users could not install their own software on the device, however.
- The Kyocera 6035 (early 2001), a dual-nature device with a separate Palm OS PDA operating system and CDMA mobile phone firmware. It supported limited Web browsing with the PDA software treating the phone hardware as an attached modem.
- Handspring's Treo 180 (2002), the first smartphone that fully integrated the Palm OS on a GSM mobile phone having telephony, SMS messaging and Internet access built in to the OS. The 180 model had a thumb-type keyboard and the 180g version had a Graffiti handwriting recognition area, instead.
Japanese cell phones
In 1999, Japanese wireless provider NTT DoCoMo launched i-mode, a new mobile internet platform which provided data transmission speeds up to 9.6 kilobits per second, and access web services available through the platform such as online shopping. NTT DoCoMo's i-mode used cHTML, a language which restricted some aspects of traditional HTML in favor of increasing data speed for the devices. Limited functionality, small screens and limited bandwidth allowed for phones to use the slower data speeds available. The rise of i-mode helped NTT DoCoMo accumulate an estimated 40 million subscribers by the end of 2001, and ranked first in market capitalization in Japan and second globally. This power would later wane in the face of the rise of 3G and new phones with advanced wireless network capabilities. Japanese cell phones increasingly diverged from global standards and trends to offer other forms of advanced services and functionality, such as mobile payments, near-field communication (NFC), and 1seg mobile television.
Smartphones were still rare outside Japan until the introduction of the Danger Hiptop in 2002, which saw moderate success among U.S. consumers as the T-Mobile Sidekick. Later, in the mid-2000s, business users in the U.S. started to adopt devices based on Microsoft's Windows Mobile, and then BlackBerry smartphones from Research In Motion. American users popularized the term "CrackBerry" in 2006 due to the BlackBerry's addictive nature.
Outside the U.S. and Japan, Nokia was seeing success with its smartphones based on Symbian, originally developed by Psion for their personal organisers, and it was the most popular smartphone OS in Europe during the middle to late 2000s. Initially, Nokia's Symbian smartphones were focused on business with the Eseries, similar to Windows Mobile and BlackBerry devices at the time. From 2006 onwards, Nokia started producing consumer-focused smartphones, popularized by the entertainment-focused Nseries. Until 2010, Symbian was the world's most widely used smartphone operating system.
Form factor shift
In the 2000s, it was common for smartphones to have a physical T9 numeric keypad or QWERTY keyboard in either a candybar or sliding form factor. Some smartphones had resistive touchscreens, which allowed for virtual keyboards and handwriting input with a finger or a stylus, thus also allowing easy entry of Asian characters.
In 2007, the LG Prada was the first mobile phone released with a large capacitive touchscreen. Later that year, Apple Computer introduced the iPhone. The iPhone was also designed around a large capacitive touchscreen, but added support for multi-touch gestures (for interactions such as "pinching" to zoom in on photos and web pages). Such phones were notable for abandoning the use of a stylus, keyboard, or keypad typical for smartphones at the time, in favor of a capacitive touchscreen for direct finger input as its only input type. The invention of the touchscreen smartphone is often attributed to Apple, but they actually made the smartphone as we know it today something mainstream due to the company's popularity in the US (and to a lesser extent worldwide) and they made popular the way that people interact with smartphones. Following the iPhone's success despite its original retail price of over US$500, other smartphone manufacturers started to use the same basic design of the iPhone.
The iPhone was at first "not a smartphone by conventional terms, being (...) a platform device that allows software to be installed",. A year later, it followed platforms like PalmOS, Symbian and Windows Mobile in allowing apps to be installed. It did so through Apple's App Store, an online distribution platform which was present on the phone and controlled and monetized by Apple. This became a common means for smartphone software distribution and installation. The first iPhone also faced criticism for not supporting the latest 3G wireless network standards, but was praised for its hardware and software design, and its June 2007 release was met with heavy demand, with customers waiting in lines outside Apple Store locations to be among the first to purchase it.
The screen-focused hardware of phones centered around a capacitive touchscreen stimulated the software to focus on features such as a web browser designed to render full web pages (as opposed to stripped down WAP services), multimedia functionality (such as videos), and online services such as maps apps. This was a key factor in the success of the form factor.
The advantages of a design around a capacitive touchscreen affected the development of another smartphone OS platform, Android, with a more BlackBerry-like prototype device scrapped in favor of a touchscreen device with a slide-out physical keyboard, as Google's engineers thought at the time that a touchscreen could not completely replace a physical keyboard and buttons. The first Android device, the HTC Dream, was released in September 2008. Although Android's adoption was relatively slow at first, it started gaining widespread popularity in 2010, largely due to its functionality at a low price, and in early 2012 dominated the smartphone market share worldwide, which continues to this day. Android is based around a modified Linux kernel, which makes Linux the most widely used operating system worldwide, and it also makes Android the most widely used general purpose operating system worldwide. Apple's iPhones are more widespread in rich, developed countries than in relatively poor and developing countries, where having an iPhone or a high end Android smartphone is considered a luxury.
Android and iPhone devices popularized the smartphone form factor based on a large capacitive touchscreen, and led to the decline of earlier, keyboard- and keypad-focused platforms. Microsoft, for instance, discontinued Windows Mobile and started a new touchscreen-oriented OS from scratch, called Windows Phone. Nokia abandoned Symbian and partnered with Microsoft to use Windows Phone on its smartphones. Windows Phone became the third-most-popular smartphone OS, before being replaced by Windows 10 Mobile, which declined in share to become "largely irrelevant" at less than 0.5% of the smartphone market. Palm replaced their Palm OS with webOS. BlackBerry Limited, formerly known as Research In Motion and known for phones with a full qwerty keyboard below the screen, made a new platform based on QNX, BlackBerry 10, with which it was possible to control a device without having to press any physical buttons.
Developments in the 2010s
In the early 2010s, larger smartphones with screen sizes of at least 5.5 inches diagonal, dubbed "phablets", began to achieve popularity, with Samsung's Galaxy Note series gaining notably wide adoption. Phablets have become the industry standard, with many companies abandoning smaller, 4-inch displays, except in their cheapest models.
In 2013, Fairphone launched its first "socially ethical" smartphone at the London Design Festival to address concerns regarding the sourcing of materials in the manufacturing followed by Shiftphone in 2015. In late 2013, QSAlpha commenced production of a smartphone designed entirely around security, encryption and identity protection. Some companies began to release smartphones incorporating flexible displays to create curved form factors, such as the Samsung Galaxy Round and LG G Flex.
In October 2013, Motorola Mobility announced Project Ara, a concept for a modular smartphone platform that would allow users to customize and upgrade their phones with add-on modules that attached magnetically to a frame. Ara was retained by Google following its sale of Motorola Mobility to Lenovo, but was shelved in 2016. That year, LG and Motorola both unveiled smartphones featuring a limited form of modularity for accessories; the LG G5 allowed accessories to be installed via the removal of its battery compartment, while the Moto Z utilizes accessories attached magnetically to the rear of the device.
The first smartphone with a fingerprint reader was the Motorola Atrix 4G in 2011. In September 2013, the iPhone 5S was unveiled as the first smartphone on a major U.S. carrier since the Atrix to feature this technology.
By 2014, 1440p displays began to appear on high-end smartphones. In 2015, Sony released the Xperia Z5 Premium, featuring a 4K resolution display, although only images and videos could actually be rendered at that resolution (all other software is upscaled from 1080p). Microsoft, expanding upon the concept of Motorola's short-lived "Webtop", unveiled functionality for its Windows 10 operating system for phones that allows supported devices to be docked for use with a PC-styled desktop environment. Other major technologies began to trend in 2016, including a focus on virtual reality and augmented reality experiences catered towards smartphones, the newly introduced USB-C connector, and improving LTE technologies. As of 2015, the global median for smartphone ownership was 43%. Statista forecast that 2.87 billion people would own smartphones in 2020.
New trends for smartphone displays began to emerge in 2017, with both LG and Samsung releasing flagship smartphones utilizing displays with taller aspect ratios than the common 16:9 ratio. These designs allow the display to have a larger diameter, but with a slimmer width than 16:9 displays with an equivalent screen size. Another trend popularized that year were displays that contained tab-like cut-outs at their top-centre—colloquially known as a "notch"—to contain the front-facing camera, and sometimes other sensors typically located along the top bezel of a device. These designs allow for "edge-to-edge" displays that take up nearly the entire height of the device, with little to no bezel along the top. This design characteristic was popularized by the Essential Phone (which featured a circular tab for its camera) and iPhone X (which used a wider tab to contain a camera and facial scanning system). In 2018, the first smartphones featuring fingerprint readers embedded within OLED displays were announced, followed in 2019 by an implementation using an ultrasonic sensor on the Samsung Galaxy S10.
Smartphones with foldable displays were theorized as possible once manufacturing costs and production processes were feasible. In November 2018, the startup company Royole unveiled the first commercially available foldable smartphone, the Royole FlexPai. Also that month, Samsung presented a prototype phone featuring an "Infinity Flex Display" at its developers conference, with a smaller, outer display on its "cover", and a larger, tablet-sized display when opened. Samsung stated that it also had to develop a new polymer material to coat the display as opposed to glass. Early examples of foldable phones from other manufacturers became the subject of rumors in early 2019; Samsung officially announced the Galaxy Fold, based on the previously-demonstrated prototype, in February 2019 for a release in late-April.
Central processing unit
Smartphones have central processing units (CPUs), similar to those in computers, but optimised to operate in low power environments.
The performance of mobile CPU depends not only on the clock rate (generally given in multiples of hertz) but also on the memory hierarchy. Because of these challenges, the performance of mobile phone CPUs is often more appropriately given by scores derived from various standardized tests to measure the real effective performance in commonly used applications.
One of the main characteristics of smartphones is the screen. Depending on the device's design, the screen fills most or nearly all of the space on a device's front surface. Many smartphone displays have an aspect ratio of 16:9, but taller aspect ratios became more common in 2017.
Screen sizes are measured in diagonal inches. Phones with screens larger than 5.2 inches are often called "phablets". Smartphones with screens over 4.5 inches in size are commonly difficult to use with only a single hand, since most thumbs cannot reach the entire screen surface; they may need to be shifted around in the hand, held in one hand and manipulated by the other, or used in place with both hands. Due to design advances, some modern smartphones with large screen sizes and "edge-to-edge" designs have compact builds that improve their ergonomics, while the shift to taller aspect ratios have resulted in phones that have larger screen sizes whilst maintaining the ergonomics associated with smaller 16:9 displays.
Liquid-crystal displays are the most common; others are IPS, LED, OLED, and AMOLED displays. Some displays are integrated with pressure-sensitive digitizers, such as those developed by Wacom and Samsung, and Apple's Force Touch system.
Some audio quality enhancing features, such as Voice over LTE and HD Voice have appeared and are often available on newer smartphones. Sound quality can remain a problem due to the design of the phone, the quality of the cellular network and compression algorithms used in long distance calls. Audio quality can be improved using a VoIP application over WiFi. Cellphones have small speakers so that the user can use a speakerphone feature and talk to a person on the phone without holding it to their ear. The small speakers can also be used to listen to digital audio files of music or speech or watch videos with an audio component, without holding the phone close to the ear.
By the end of 2017, smartphone battery life has become generally adequate; however, earlier smartphone battery life was poor due to the weak batteries that could not handle the significant power requirements of the smartphones' computer systems and color screens.
Smartphone users purchase additional chargers for use outside the home, at work, and in cars and by buying portable external "battery packs". External battery packs include generic models which are connected to the smartphone with a cable, and custom-made models that "piggyback" onto a smartphone's case. In 2016, Samsung had to recall millions of the Galaxy Note 7 smartphones due to an explosive battery issue. For consumer convenience, wireless charging stations have been introduced in some hotels, bars, and other public spaces.
A wide range of accessories are sold for smartphones, including cases, screen protectors, power charging cables, wireless power stations, USB On-The-Go adapters (for connecting USB drives and or, in some cases, a HDMI cable to an external monitor), add-on batteries, headphones, combined headphone-microphones (which, for example, allow a person to privately conduct calls on the device without holding it to the ear), and Bluetooth-enabled powered speakers that enable users to listen to media from their smartphones wirelessly.
Cases range from relatively inexpensive rubber or soft plastic cases which provide moderate protection from bumps and good protection from scratches to more expensive, heavy-duty cases that combine a rubber padding with a hard outer shell. Some cases have a "book"-like form, with a cover that the user opens to use the device; when the cover is closed, it protects the screen. Some "book"-like cases have additional pockets for credit cards, thus enabling people to use them as wallets.
Accessories include products sold by the manufacturer of the smartphone and compatible products made by other manufacturers.
Mobile operating systems
Mobile operating systems combine features of a personal computer operating system with other features useful for mobile or handheld use; usually including, and most of the following considered essential in modern mobile systems; a touchscreen, cellular, Bluetooth, Wi-Fi Protected Access, Wi-Fi, Global Positioning System (GPS) mobile navigation, video- and single-frame picture cameras, speech recognition, voice recorder, music player, near field communication, and infrared blaster. By Q1 2018, over 383 million smartphones were sold with 85.9 percent running Android, 14.1 percent running iOS and a negligible number of smartphones running other OSes. Android alone is more popular than the popular desktop operating system Windows, and in general smartphone use (even without tablets) exceeds desktop use.
Mobile devices with mobile communications abilities (e.g., smartphones) contain two mobile operating systems – the main user-facing software platform is supplemented by a second low-level proprietary real-time operating system which operates the radio and other hardware. Research has shown that these low-level systems may contain a range of security vulnerabilities permitting malicious base stations to gain high levels of control over the mobile device.
A mobile app is a computer program designed to run on a mobile device, such as a smartphone. The term "app" is a short-form of the term "software application".
The introduction of Apple's App Store for the iPhone and iPod Touch in July 2008 popularized manufacturer-hosted online distribution for third-party applications (software and computer programs) focused on a single platform. There are a huge variety of apps, including video games, music products and business tools. Up until that point, smartphone application distribution depended on third-party sources providing applications for multiple platforms, such as GetJar, Handango, Handmark, and PocketGear. Following the success of the App Store, other smartphone manufacturers launched application stores, such as Google's Android Market (later renamed to the Google Play Store) and RIM's BlackBerry App World and Android-related app stores like F-Droid. In February 2014, 93% of mobile developers were targeting smartphones first for mobile app development.
Since 1996, smartphone shipments have had positive growth. In November 2011, 27% of all photographs created were taken with camera-equipped smartphones. In September 2012, a study concluded that 4 out of 5 smartphone owners use the device to shop online. Global smartphone sales surpassed the sales figures for feature phones in early 2013. Worldwide shipments of smartphones topped 1 billion units in 2013, up 38% from 2012's 725 million, while comprising a 55% share of the mobile phone market in 2013, up from 42% in 2012. In Q1 2016 for the first time the shipments dropped by 3 percent year on year. The situation was caused by the maturing China market.
In 2011, Samsung had the highest shipment market share worldwide, followed by Apple. In 2013, Samsung had 31.3% market share, a slight increase from 30.3% in 2012, while Apple was at 15.3%, a decrease from 18.7% in 2012. Huawei, LG and Lenovo were at about 5% each, significantly better than 2012 figures, while others had about 40%, the same as the previous years figure. Only Apple lost market share, although their shipment volume still increased by 12.9%; the rest had significant increases in shipment volumes of 36–92%. In Q1 2014, Samsung had a 31% share and Apple had 16%. In Q4 2014, Apple had a 20.4% share and Samsung had 19.9%. In Q2 2016, Samsung had a 22.3% share and Apple had 12.9%. In Q1 2017, IDC reported that Samsung was first placed, with 80 million units, followed by Apple with 50.8 million, Huawei with 34.6 million, Oppo with 25.5 million and Vivo with 22.7 million.
Samsung's mobile business is half the size of Apple's, by revenue. Apple business has been increasing very rapidly over the past 4 years.
By operating system
A 2012 University of Southern California study found that unprotected adolescent sexual activity was more common among owners of smartphones. A study conducted by the Rensselaer Polytechnic Institute's (RPI) Lighting Research Center (LRC) concluded that smartphones, or any backlit devices, can seriously affect sleep cycles. Some persons might become psychologically attached to smartphones resulting in anxiety when separated from the devices. A "smombie" (a combination of "smartphone" and "zombie") is a walking person using a smartphone and not paying attention as they walk, possibly risking an accident in the process, an increasing social phenomenon. The issue of slow-moving smartphone users led to the temporary creation of a "mobile lane" for walking in Chongqing, China. The issue of distracted smartphone users led the city of Augsburg, Germany to embed pedestrian traffic lights in the pavement.
Mobile banking and payment
In many countries, mobile phones are used to provide mobile banking services, which may include the ability to transfer cash payments by secure SMS text message. Kenya's M-PESA mobile banking service, for example, allows customers of the mobile phone operator Safaricom to hold cash balances which are recorded on their SIM cards. Cash can be deposited or withdrawn from M-PESA accounts at Safaricom retail outlets located throughout the country and can be transferred electronically from person to person and used to pay bills to companies.
Branchless banking has been successful in South Africa and the Philippines. A pilot project in Bali was launched in 2011 by the International Finance Corporation and an Indonesian bank, Bank Mandiri.
Another application of mobile banking technology is Zidisha, a US-based nonprofit micro-lending platform that allows residents of developing countries to raise small business loans from Web users worldwide. Zidisha uses mobile banking for loan disbursements and repayments, transferring funds from lenders in the United States to borrowers in rural Africa who have mobile phones and can use the Internet.
Mobile payments were first trialled in Finland in 1998 when two Coca-Cola vending machines in Espoo were enabled to work with SMS payments. Eventually, the idea spread and in 1999, the Philippines launched the country's first commercial mobile payments systems with mobile operators Globe and Smart.
Some mobile phones can make mobile payments via direct mobile billing schemes, or through contactless payments if the phone and the point of sale support near field communication (NFC). Enabling contactless payments through NFC-equipped mobile phones requires the co-operation of manufacturers, network operators, and retail merchants.
Mobile phone use while driving—including calling, text messaging, playing media, web browsing, gaming, using mapping apps or operating other phone features—is common but controversial, since it is widely considered dangerous due to what is known as distracted driving. Being distracted while operating a motor vehicle has been shown to increase the risk of accidents. In September 2010, the US National Highway Traffic Safety Administration (NHTSA) reported that 995 people were killed by drivers distracted by phones. In March 2011 a US insurance company, State Farm Insurance, announced the results of a study which showed 19% of drivers surveyed accessed the Internet on a smartphone while driving. Many jurisdictions prohibit the use of mobile phones while driving. In Egypt, Israel, Japan, Portugal and Singapore, both handheld and hands-free calling on a mobile phone (which uses a speakerphone) is banned. In other countries including the UK and France and in many US states, only the use of calling on handheld phones is banned, while hands-free use is permitted.
A 2011 study reported that over 90% of college students surveyed text (initiate, reply or read) while driving. The scientific literature on the danger of driving while sending a text message from a mobile phone, or texting while driving, is limited. A simulation study at the University of Utah found a sixfold increase in distraction-related accidents when texting. Due to the complexity of smartphones that began to grow more after, this has introduced additional difficulties for law enforcement officials when attempting to distinguish one usage from another in drivers using their devices. This is more apparent in countries which ban both handheld and hands-free usage, rather than those which ban handheld use only, as officials cannot easily tell which function of the phone is being used simply by looking at the driver. This can lead to drivers being stopped for using their device illegally for a call when, in fact, they were using the device legally, for example, when using the phone's incorporated controls for car stereo, GPS or satnav.
A 2010 study reviewed the incidence of phone use while cycling and its effects on behavior and safety. In 2013 a national survey in the US reported the number of drivers who reported using their phones to access the Internet while driving had risen to nearly one of four. A study conducted by the University of Vienna examined approaches for reducing inappropriate and problematic use of mobile phones, such as using phones while driving.
Accidents involving a driver being distracted by being in a call on a phone have begun to be prosecuted as negligence similar to speeding. In the United Kingdom, from 27 February 2007, motorists who are caught using a handheld phone while driving will have three penalty points added to their license in addition to the fine of £60. This increase was introduced to try to stem the increase in drivers ignoring the law. Japan prohibits all use of phones while driving, including use of hands-free devices. New Zealand has banned handheld phone use since 1 November 2009. Many states in the United States have banned text messaging on phones while driving. Illinois became the 17th American state to enforce this law. As of July 2010, 30 states had banned texting while driving, with Kentucky becoming the most recent addition on July 15.
Public Health Law Research maintains a list of distracted driving laws in the United States. This database of laws provides a comprehensive view of the provisions of laws that restrict the use of mobile devices while driving for all 50 states and the District of Columbia between 1992, when first law was passed through December 1, 2010. The dataset contains information on 22 dichotomous, continuous or categorical variables including, for example, activities regulated (e.g., texting versus talking, hands-free versus handheld calls, web browsing, gaming), targeted populations, and exemptions.
A "patent war" between Samsung and Apple started when the latter claimed that the original Galaxy S Android phone copied the interface—and possibly the hardware—of Apple's iOS for the iPhone 3GS. There was also smartphone patents licensing and litigation involving Sony Mobile, Google, Apple Inc., Samsung, Microsoft, Nokia, Motorola, HTC, Huawei and ZTE, among others. The conflict is part of the wider "patent wars" between multinational technology and software corporations. To secure and increase market share, companies granted a patent can sue to prevent competitors from using the methods the patent covers. Since the 2010s the number of lawsuits, counter-suits, and trade complaints based on patents and designs in the market for smartphones, and devices based on smartphone OSes such as Android and iOS, has increased significantly. Initial suits, countersuits, rulings, license agreements, and other major events began in 2009 as the smartphone market stated to grow more rapidly by 2012.
Some apps allows for sending and receiving facsimile (Fax), over a smartphone, including facsimile data (composed of raster bi-level graphics) generated directly and digitally from document and image file formats.
With the rise in number of mobile medical apps in the market place, government regulatory agencies raised concerns on the safety of the use of such applications. These concerns were transformed into regulation initiatives worldwide with the aim of safeguarding users from untrusted medical advice.
Smartphone malware is easily distributed through an insecure app store. Often, malware is hidden in pirated versions of legitimate apps, which are then distributed through third-party app stores. Malware risk also comes from what is known as an "update attack", where a legitimate application is later changed to include a malware component, which users then install when they are notified that the app has been updated. As well, one out of three robberies in 2012 in the United States involved the theft of a mobile phone. An online petition has urged smartphone makers to install kill switches in their devices. In 2014, Apple's "Find my iPhone" and Google's "Android Device Manager" can locate, disable, and wipe the data from phones that have been lost or stolen. With BlackBerry Protect in OS version 10.3.2, devices can be rendered unrecoverable to even BlackBerry's own Operating System recovery tools if incorrectly authenticated or dissociated from their account.
Leaked documents published by WikiLeaks, codenamed Vault 7 and dated from 2013–2016, detail the capabilities of the United States Central Intelligence Agency (CIA) to perform electronic surveillance and cyber warfare, including the ability to compromise the operating systems of most smartphones (including iOS and Android).
Guidelines for mobile device security were issued by NIST and many other organizations. For conducting a private, in-person meeting, at least one site recommends that the user switch the smartphone off and disconnect the battery.
Using smartphones late at night can disturb sleep, due to the blue light and brightly lit screen, which affects melatonin levels and sleep cycles. In an effort to alleviate these issues, several apps that change the color temperature of a screen to a warmer hue based on the time of day to reduce the amount of blue light generated have been developed for Android, while iOS 9.3 integrated similar, system-level functionality known as "Night Shift". Amazon released a feature known as "blue shade" in their Fire OS "Bellini" 5.0 and later. It has also been theorized that for some users, addicted use of their phones, especially before they go to bed, can result in "ego depletion". Many people also use their phones as alarm clocks, which can also lead to loss of sleep.
Pocket cameras have difficulty producing bokeh in images, but nowadays, some smartphones have dual-lens cameras that produce the bokeh effect easily, and can even rearrange the level of bokeh after shooting. The iPhone 7 Plus debuted with a dual-lens camera in the back of the smartphone. More advanced smartphones may come with 'quad cameras', or two dual-lens cameras such as the Honor 9 Lite smartphone. The back and front of the smartphone each have a 13MP main lens and a 2MP lens for capturing depth information. The Evercoss U50A Max smartphone has 4 cameras, and costs less than $100.
Huawei P20 Pro smartphone with triple lenses in the back of the smartphone has been launched as bokeh camera smartphone with optical zoom. First lens has 40MP RGB, second lens has 20MP monochrome and third lens has 8MP RGB telephoto 3x. The zoom can be enhanced to 5x with combination of the optical zoom and megapixel lens 40MP RGB to produce undeteriorated (optical+digital) zoom or digital zoom without loss of quality.
- "A Survey of Techniques for Improving Efficiency of Mobile Web Browsing", CPE, 2018
- Don Reisinger (October 17, 2012). "Worldwide smartphone user base hits 1 billion". CNet. Retrieved July 26, 2013.
- "Smartphones now outsell 'dumb' phones". 3 News NZ. April 29, 2013. Archived from the original on August 1, 2013. Retrieved April 29, 2013.
- "Watch The Incredible 70-Year Evolution Of The Cell Phone". Wonder How To. Retrieved March 5, 2015.
- Sager, Ira (June 29, 2012). "Before IPhone and Android Came Simon, the First Smartphones". Bloomberg Businessweek. Bloomberg L.P. Retrieved June 30, 2012.
Simon was the first smartphone. Twenty years ago, it envisioned our app-happy mobile lives, squeezing the features of a cell phone, pager, fax machine, and computer into an 18-ounce black brick.
- Schneidawind, John (November 23, 1992). "Poindexter putting finger on PC bugs; Big Blue unveiling". USA Today. p. 2B.
- Connelly, Charlotte. "World's first 'smartphone' celebrates 20 years". BBC News. BBC News. Retrieved August 16, 2014.
- History of first touchscreen smartphone Archived May 1, 2016, at the Wayback Machine Spinfold.com
- Savage, Pamela (January 1995). "Designing a GUI for Business Telephone users". Association of Computing Machinery. Retrieved September 13, 2014.
...It is at this point that early usability test participants met impasse. The switch connected to our "smart phone" is expecting the typical "dumb end-point"... AT&T's PhoneWriter was demonstrated at the 1993 Comdex Computer Show...
- "Qualcomm's pdQ Smartphone" (Press release). Qualcomm.
- "PDA Review: Ericsson R380 Smartphone". Geek.com. Archived from the original on July 12, 2011. Retrieved April 27, 2011.
- "Ericsson Introduces The New R380e". Mobile Magazine. Archived from the original on March 25, 2012. Retrieved April 27, 2011.
- Brown, Bruce (April 24, 2001). "Ericsson R380 World Review & Rating". PC Magazine.
- "Kyocera QCP 6035 Smartphone Review". Palminfocenter.com. March 16, 2001. Retrieved September 7, 2011.
- Segan, Sascha (March 23, 2010). "Kyocera Launches First Smartphone In Years | News & Opinion". PCmag.com. Retrieved September 7, 2011.
- "Handspring Treo Communicator 180". mobiletechreview.com. Archived from the original on June 17, 2016. Retrieved February 1, 2016.
- Tabuchi, Hiroko. "Why Japan's Smartphones Haven't Gone Global". The New York Times. Retrieved October 6, 2018.
- Barnes, Stuart J, Huff, Sid L. (November 1, 2003). Rising Sun: iMode and the Wireless Internet, Vol. 46, No. 1. Communications of the ACM. pp. 79–84.
- Anwar, Sayid Tariq. "NTT DoCoMo and M-Commerce: A Case Study in Market Expansion and Global Strategy" (PDF). The American Graduate School of International Management. Retrieved February 16, 2014.
- Rose, Frank (September 2001). "Pocket Monster: How DoCoMo's wireless Internet service went from fad to phenom - and turned Japan into the first post-PC nation". Wired. 9 (9). Retrieved January 24, 2014.
- "Why Japanese smartphones never went global". PC World AU. Retrieved October 6, 2018.
- "Info Addicts Are All Thumbs: Crackberry Is the 2006 Word of the Year". PR Newswire. November 1, 2006. Retrieved January 24, 2014.
- "The Nokia E Series Range of Smartphones". Brighthub.com. September 27, 2010. Retrieved September 6, 2017.
- Schroeder, Stan (February 23, 2010). "Smartphones in 2009: Symbian Dominates, iPhone, RIM and Android Rising Fast". Mashable. Retrieved September 3, 2013.
- Whitwam, Ryan. "How Steve Jobs killed the stylus and made smartphones usable". ExtremeTech. Retrieved April 4, 2018.
- Temple, Stephen. "Vintage Mobiles: LG Prada – First mobile with a capacitive touchscreen (May 2007)". History of GMS: Birth of the mobile revolution.
- "The iPhone is not a smartphone". Engadget.com. January 9, 2007. Retrieved July 11, 2010.
- "Manifesto". A History of Mobile Application Development. Retrieved April 17, 2019.
- "Tracing the History and Evolution of Mobile Apps". Tech.co. Retrieved April 17, 2019.
- Grandoni, Dino (October 5, 2011). "How Long People Waited to Be First in Line to Buy Apple Products". The Atlantic. Retrieved October 6, 2018.
- "The Day Google Had to 'Start Over' on Android". The Atlantic. Retrieved December 20, 2013.
- Elgin, Ben (August 17, 2005). "Google Buys Android for Its Mobile Arsenal". Bloomberg Businessweek. Bloomberg. Archived from the original on February 24, 2011. Retrieved February 20, 2012.
- Block, Ryan (August 28, 2007). "Google is working on a mobile OS, and it's due out shortly". Engadget. Retrieved February 17, 2012.
- "All T-Mobile retail stores to carry G1". CNET. CBS Interactive. Retrieved June 17, 2013.
- "Kantar Worldpanel ComTech's Smartphone OS market share data Q3 2012". Kantar. Retrieved November 17, 2013.
- It's official: Windows 10 Mobile is irrelevant
- Mat Smith (December 29, 2011). "1 million Galaxy Notes shipped worldwide, US fans throw money at their screens". Engadget.
- "Samsung: 10M Galaxy Notes sold in nine months". CNET. Retrieved January 18, 2013.
- George Monbiot (September 23, 2013). "Why is Apple so shifty about how it makes the iPhone?". The Guardian. Retrieved September 24, 2013.
- Schröder, Horst (April 4, 2016). "So gut ist das erste Fairphone aus Deutschland". www.gruenderszene.de. Retrieved September 5, 2018.
- Darrell Etherington (October 10, 2013). "Quasar IV Encrypted Ninja Smartphone Goes Into Production, Despite Indiegogo Failure". TechCrunch. Verizon Media. Retrieved October 10, 2013.
- "Samsung's Galaxy Round is the first phone with a curved display". The Verge. Vox Media. Retrieved March 21, 2017.
- "LG G Flex appears on the FCC with AT&T-friendly LTE". Engadget. Retrieved March 9, 2014.
- "LG G Flex announced with vertically curved 6-inch 720p screen, 'self-repairing' back cover". Engadget. Verizon Media. Retrieved March 9, 2014.
- Byford, Sam (October 29, 2013). "Motorola reveals ambitious plan to build modular smartphones". The Verge. Vox Media. Retrieved October 29, 2013.
- Musil, Steven (October 29, 2013). "Motorola unveils Project Ara for custom smartphones". CNET. CBS Interactive. Retrieved October 29, 2013.
- Pierce, David. "Project Ara Lives: Google's Modular Phone Is Ready for You Now". Wired. Retrieved May 20, 2016.
- "Google confirms the end of its modular Project Ara smartphone". The Verge. Vox Media. Retrieved September 2, 2016.
- "LG G5 hands-on—LG may have made the most innovative phone of MWC". Ars Technica. Retrieved February 21, 2016.
- "Motorola's new Moto Z ditches the headphone jack, adds hot-swapping magnetic modular accessories". CNET. CBS Interactive. Retrieved June 9, 2016.
- "Fingerprint Scanner On Phones: History & Evolution, But Do We Really Need That?". Web cusp.
- Newton, Casey (September 10, 2013). "Apple's new iPhone will read your fingerprint". The Verge. Retrieved September 11, 2013.
- Steve Dent (February 18, 2014). "Do you really need a 4K smartphone screen?".
- "Sony's 4K smartphone shows most content in 1080p". Engadget. Retrieved March 21, 2017.
- "Inside Microsoft's Plan to Unlock the Full Power of Your Phone". Time.com. Retrieved March 21, 2017.
- Miller, Ross. "Microsoft's new Display Dock transforms your Windows 10 mobile into a PC". The Verge. Vox Media. Retrieved October 6, 2015.
- "7 exciting smartphone trends to watch in 2016: VR, super-fast LTE, and more". PC World. Retrieved March 21, 2017.
- "This map shows the percentage of people around the world who own smartphones". Business Insider.
- "Number of smartphone users worldwide 2014-2020 | Statista". Statista. Retrieved May 23, 2017.
- "LG G6 With 5.7-Inch FullVision Display, Google Assistant Launched at MWC 2017". Gadgets360. NDTV. Retrieved February 26, 2017.
- "The LG G6 is sleek, solid, and surprisingly sensible". The Verge. Vox Media. Retrieved February 26, 2017.
- "This is the Samsung Galaxy S8, coming April 21st". The Verge. Retrieved October 4, 2018.
- "Google thankfully bans Android phones with three notches or other exotic configurations". PCWorld. Retrieved October 4, 2018.
- Mathur, Vishal (April 29, 2018). "Why do Android phones want a notch?". Livemint. Retrieved October 4, 2018.
- Petrov, Daniel. "What was the first phone with a notch? Answer may surprise you". Phone Arena. Retrieved October 4, 2018.
- Axon, Samuel (November 25, 2017). "How app developers and designers feel about the iPhone X—and the notch". Ars Technica. Condé Nast. Retrieved December 4, 2017.
- "I tried the first phone with an in-display fingerprint sensor". The Verge. Retrieved October 4, 2018.
- Seifert, Dan (February 20, 2019). "Samsung officially announces the Galaxy S10 and S10 Plus, starting at $899". The Verge. Retrieved February 20, 2019.
- King, Ian (December 15, 2013). "Bendable smartphones aren't coming anytime soon". The Sydney Morning Herald. Retrieved February 5, 2019.
- Warren, Tom (November 8, 2018). "The foldable phones are coming". The Verge. Retrieved February 5, 2019.
- Statt, Nick (November 5, 2018). "We tried the world's first folding phone, and it actually works". The Verge. Retrieved February 5, 2019.
- Warren, Tom (November 7, 2018). "This is Samsung's foldable smartphone". The Verge. Retrieved February 5, 2019.
- Swearingen, Jake (January 29, 2019). "How Much Would You Pay for a Foldable Smartphone?". Intelligencer. Retrieved February 5, 2019.
- Warren, Tom (January 23, 2019). "Xiaomi's folding phone is the best we've seen so far". The Verge. Retrieved February 5, 2019.
- Dunn, Jeff (February 20, 2019). "Samsung's foldable phone is finally official—meet the Galaxy Fold". Ars Technica. Retrieved February 23, 2019.
- "CPU Frequency". CPU World Glossary. CPU World. March 25, 2008. Retrieved January 1, 2010.
- "Don't call it a phablet: the 5.5" Samsung Galaxy S7 Edge is narrower than many 5.2" devices". PhoneArena. Retrieved April 3, 2017.
- "We're gonna need Pythagoras' help to compare screen sizes in 2017". The Verge. Retrieved April 3, 2017.
- "The Samsung Galaxy S8 will change the way we think about display sizes". The Verge. Vox Media. Retrieved April 3, 2017.
- Ward, J. R.; Phillips, M. J. (April 1, 1987). "Digitizer Technology: Performance Characteristics and the Effects on the User Interface". IEEE Computer Graphics and Applications. 7 (4): 31–44. doi:10.1109/MCG.1987.276869. ISSN 0272-1716.
- Jeff Hecht. "Why Mobile Voice Quality Still Stinks—and How to Fix It". ieee.org.
- Elena Malykhina. "Why Is Cell Phone Call Quality So Terrible?". scientificamerican.com.
- Alan Henry. "What's the Best Mobile VoIP App?". Lifehacker. Gawker Media.
- "6 phones with the best battery life". Retrieved October 31, 2017.
- "J.D. Power and Associates Reports: Smartphone Battery Life has Become a Significant Drain on Customer Satisfaction and Loyalty". Retrieved September 11, 2014.
- Kendrick, James (August 4, 2014). "The secret behind poor smartphone battery life". ZDNet. Retrieved November 2, 2017.
- "Peak Battery: Why Smartphone Battery Life Still Stinks, and Will for Years". TIME.com. April 1, 2013.
- "Refurbished version of ill-fated Galaxy Note 7 will soon be available overseas". May 5, 2017.
- "The Most Impactful New iPhone Feature May Be the Most Boring". WIRED. Retrieved September 22, 2017.
- "Gartner Says Worldwide Sales of Smartphones Returned to Growth in First Quarter of 2018". Gartner, Inc. Gartner. May 29, 2018. Retrieved August 25, 2018.
- Thom Holwerda, OSNews, November 12, 2013, The second operating system hiding in every mobile phone Archived November 13, 2013, at the Wayback Machine
- W3C Interview: Vision Mobile on the App Developer Economy with Matos Kapetanakis and Dimitris Michalakos Archived June 29, 2016, at the Wayback Machine. February 18, 2014. Retrieved February 24, 2015.
- Erica Ogg (December 22, 2011). "Smartphones killing point-and-shoots, now take almost 1/3 of photos". GIGAOM. GIGAOM. Retrieved June 27, 2013.
- Leena Rao (September 19, 2012). "comScore: 4 Out Of 5 Smartphone Owners Use Device To Shop; Amazon Is The Most Popular Mobile Retailer". TechCrunch. AOL Inc. Retrieved June 27, 2013.
- "Worldwide Smartphone Shipments Top One Billion Units for the First Time, According to IDC". IDC. January 2014. Archived from the original on January 31, 2014. Retrieved January 27, 2014.CS1 maint: BOT: original-url status unknown (link)
( via Wayback)
- Daniel van Boom (April 27, 2016). "It's not just Apple: Global smartphone market shrinks for the first time ever".
- "Gartner Says Huawei Secured No. 2 Worldwide Smartphone Vendor Spot, Surpassing Apple in Second Quarter 2018". Gartner. Retrieved November 11, 2018.
- "Top Five Smartphone Vendors, Shipments, Market Share, and Year-Over-Year Growth, Q2 2018". International Data Corporation. Retrieved November 11, 2018.
- Jon Fingas (January 28, 2014). "Smartphone sales may have topped 1 billion in 2013, depending on who you ask". Engadget.
- Steven Millward (May 13, 2014). "Xiaomi breaks into global top 10 for smartphone shipments, kicks out HTC". Tech In Asia. Retrieved September 9, 2014.
- Brett Molina and Marco della Cava, USA TODAY (March 3, 2015). "Apple beats Samsung in Q4 smartphone sales". USA TODAY.
- Frank Hersey (July 4, 2017). "6 of the world's top 10 smartphone brands are Chinese". technode. Retrieved July 7, 2017.
- Dunn, Jeff (February 28, 2017). "Samsung introduced 10 times as many phones as Apple last year, but its mobile division made half as much revenue". Business Insider.
- "SMARTPHONES make TEENS have SEX with STRANGERS". theregister.co.uk. Retrieved January 18, 2016.
- Colaner, Seth (August 27, 2012). "Your Tablet and Smartphone Could Be Ruining Your Sleep". Retrieved January 22, 2014.
- Cheever, N. A., Rosen, L. D., Carrier, L. M., & Chavez, A. (2014). Out of sight is not out of mind: The impact of restricting wireless mobile device use on anxiety levels among low, moderate and high users. Computers in Human Behavior, 37, 290-297.
- Hookham, Mark; Togoh, Isabel; Yeates, Alex (February 21, 2016). "Walkers hit by curse of the smombie". The Sunday Times. UK. Retrieved February 23, 2016.
- Hatton, Celia (September 15, 2014). "Chongqing's 'mobile lane'". BBC News. UK: BBC. Retrieved February 23, 2016.
- Rick Noack (April 25, 2016) This city embedded traffic lights in the sidewalks so that smartphone users don’t have to look up The Washington Post. Retrieved 5 May 2016.
- "Branchless banking to start in Bali". The Jakarta Post. April 13, 2012. Retrieved June 4, 2012.
- ""Zidisha Set to "Expand" in Peer-to-Peer Microfinance", Microfinance Focus, Feb 2010". Microfinancefocus.com. February 7, 2010. Archived from the original on September 21, 2012. Retrieved June 4, 2012.
- Feig, Nancy (June 25, 2007). "Mobile Payments: Look to Korea". banktech.com. Archived from the original on March 26, 2010. Retrieved January 29, 2011.
- Ready, Sarah (November 10, 2009). "NFC mobile phone set to explode". connectedplanetonline.com. Archived from the original on January 24, 2010. Retrieved January 29, 2011.
- Tofel, Kevin C. (August 20, 2010). "VISA Testing NFC Memory Cards for Wireless Payments". gigaom.com. Retrieved January 21, 2011.
- "Quit Googling yourself and drive: About 20% of drivers using Web behind the wheel, study says". Los Angeles Times. March 4, 2011.
- Atchley, Paul; Atwood, Stephanie; Boulton, Aaron (January 2011). "The Choice to Text and Drive in Younger Drivers: Behaviour May Shape Attitude". Accident Analysis and Prevention. 43: 134–142. doi:10.1016/j.aap.2010.08.003.
- "Text messaging not illegal but data clear on its peril".
- de Waard, Dick; Schepers, Paul; Ormel, Wieke; Brookhuis, Karel (January 2010). "Mobile phone use while cycling: Incidence and effects on behaviour and safety". Ergonomics. 53 (1): 30–42. doi:10.1080/00140130903381180. PMID 20069479.
- "Drivers still Web surfing while driving, survey finds".
- "Reaching the Mobile Respondent: Determinants of High-Level Mobile Phone Use Among a High-Coverage Group" (PDF). Social Science Computer Review. doi:10.1177/0894439309353099.
- "BBC NEWS - UK - UK Politics - Drivers face new phone penalties". news.bbc.co.uk.
- "BBC NEWS - UK - Magazine - Careless talk". news.bbc.co.uk.
- "Illinois to ban texting while driving - CNN.com". CNN. August 6, 2009. Retrieved May 12, 2010.
- Steitzer, Stephanie (July 14, 2010). "Texting while driving ban, other new Kentucky laws take effect today". The Courier-Journal. Archived from the original on January 19, 2013. Retrieved July 15, 2010.
- "Distracted Driving Laws". Public Health Law Research. July 15, 2011. Retrieved June 27, 2014.
- Yetisen, A. K.; Martinez-Hurtado, J. L.; et al. (2014). "The regulation of mobile medical applications". Lab on a Chip. 14 (5): 833–840. doi:10.1039/C3LC51235E.
- Mobile Malware Development Continues To Rise, Android Leads The Way.
- Mylonas Alexios; Tsoumas Bill; Dritsas Stelios; Gritzalis Dimitris (2011). 8th International Conference on Trust, Privacy & Security in Digital Business (TRUSTBUS-2011). Springer Berlin / Heidelberg. pp. 49–61.
- "The Mother Of All Android Malware Has Arrived". Android Police. March 6, 2011.
- Perez, Sarah (February 12, 2009). "Android Vulnerability So Dangerous, Owners Warned Not to Use Phone's Web Browser". Readwriteweb.com. Archived from the original on August 10, 2011. Retrieved August 8, 2011.
- "Lookout, Retrevo warn of growing Android malware epidemic, note Apple's iOS is far safer". Appleinsider.com. August 3, 2011. Retrieved January 5, 2012.
- "Plea urges anti-theft phone tech". The San Francisco Examiner.
- "Getting started with Anti-Theft Protection in BlackBerry 10 OS version 10. - Inside BlackBerry Help Blog". blackberry.com. Retrieved January 18, 2016.
- "Vault 7: Wikileaks reveals details of CIA's hacks of Android, iPhone Windows, Linux, MacOS, and even Samsung TVs". Computing. March 7, 2017.
- Greenberg, Andy (March 7, 2017). "How the CIA Can Hack Your Phone, PC, and TV (Says WikiLeaks)". WIRED.
- Murugiah P. Souppaya; Karen A. Scarfone (June 21, 2013). "Guidelines for Managing the Security of Mobile Devices in the Enterprise". National Institute of Standards and Technology. doi:10.6028/NIST.SP.800-124r1. Special Publication (NIST SP) - 800-124 Rev 1.
- "Use Your Smartphone As Securely As Possible". Security in-a-box.
- "Stop your gadgets from keeping you awake at night". CNET. Retrieved June 1, 2016.
- Kalsbeek, Andries (2012). The Neurobiology of Circadian Timing Elsevier. pp. 382.
- Luisa Dillner. "Should I keep my smartphone and tablet out of my bedroom?". The Guardian. Retrieved June 17, 2014.
- "Are smartphones disrupting your sleep?". ScienceDaily. Retrieved June 17, 2014.
- Mahesh Sharma. "Switching off your smartphone at night makes you more productive". Smh.com.au. Retrieved June 17, 2014.
- "Here's what 'bokeh' is, and how the iPhone 7 Plus fakes it". Retrieved March 30, 2018.
- ABHISHEK BAXI (February 8, 2018). "Honor 9 Lite review: four lenses on a budget". Retrieved March 30, 2018.
- Khoirunnisa (February 20, 2018). "Saingi Nova 2i, Evercoss U50A Max Usung 4 Kamera". Retrieved March 30, 2018.
- Andy Boxall (June 4, 2018). "Huawei P20 Pro review".
- Media related to Smartphone at Wikimedia Commons