Xiaomi Mi 4
|Slogan||Since July 2014: "The Fastest & Most Gorgeous MiPhone Ever."|
|Compatible networks||GSM, CDMA, 3G, EVDO, HSDPA, LTE|
|First released||August 2014|
|Availability by country||August 2014|
|Dimensions||139.2 mm (5.48 in) H
68.5 mm (2.70 in) W
8.9 mm (0.35 in) D
|Weight||149 g (5.26 oz)|
|Operating system||Original: MIUI 5
Current: MIUI 6, released August 16, 2014
|CPU||2.5 GHz quad-core|
|Memory||3 GB RAM|
|Storage||16 or 64 GB|
|Data inputs||Multi-touch touchscreen display,
ambient light sensor
|Display||5 in (130 mm) diagonal
(16:9 aspect ratio),
LED backlit IPS TFT LCD,
1080x1920 pixels at 441 ppi
|Rear camera||13 MP back-side illuminated sensor,
HD video (2160p) at 30 frame/s,
dual warm/cool LED flashes,
|Front camera||8 MP, HD video (1080p)|
The Xiaomi Mi4 (Chinese: 小米手机4) is a smartphone developed by Xiaomi Inc. It is part of Xiaomi's high-end smartphone line, and was released on August 2014. Xiaomi held an event to formally introduce the high-end phone, and its complementary smart-accessory, the Xiaomi MiBand, during the Xiaomi New Product Launch Event 2014 on July 22, 2014.
Similar to the principle of the Xiaomi Mi2, the Mi4 is a highly revamped version of its predecessor, the Xiaomi Mi3. The phone is of a very different design to its predecessor. It was also the first Xiaomi device to ship with an older version of the MIUI mobile operating system, MIUI 5, which was introduced in August 2013 compared to its successor, the MIUI 6, which was introduced in August 2014.
Reception towards the device was generally positive, though there were still a high amount of negative feedback from users of Apple's iPhone due to its similar design and quality, some media companies hailed it to be one of the best smartphones available in the market due to its high-end hardware which is sold for a comparably at a lower price compared to competitor smartphones. However, others criticized it for being too similar to Apple's iPhone and iOS.
Before its official unveiling, media speculation primarily centered around leaks; including photos of the early prototypes of the device and screenshots of the MIUI 6, these leaks were later proven to be fake.
Xiaomi announced the Xiaomi Mi4 and MiBand during a media event at the CNCC on July 22, 2014. While the device was announced in July 2014, it didn't become available until August 2014, shortly before the unveiling the MIUI 6.
On August 2014, the Xiaomi Mi4 was released in China and then began branching out to other countries. Xiaomi operated in a limited, however expanding, list of countries and consumers outside of the countries it operates in have to buy it online if the want to.
Operating system and software
The Xiaomi Mi4 features MIUI 5, Xiaomi's variant of the Android operating system. The user interface of MIUI is similar to Apple's iOS and Samsung's TouchWiz and is based on the concept of direct manipulation, using multi-touch gestures. Interface control elements consist of sliders, switches, and buttons. Interaction with the OS includes gestures such as swipe, tap, pinch and reverse pinch, all of which have specific definitions within the context of the Android operating system and its multi-touch interface. Internal accelerometers are used by some applications to respond to the movement of the device such as rotating it vertically (one common result is switching from portrait to landscape mode).
The Xiaomi Mi4 is surprisingly supplied with MIUI 5, released on August 16, 2013, instead of MIUI 6 which was released at roughly the same time as the device. The device includes an updater application which allows it to update its OS to the latest version of MIUI available for it. MIUI 6 adds a more iOS-like user interface as well as various other features. MIUI comes preinstalled with a pre-installed back-up and sync application called MiCloud, similar to Apple's iCloud.
The device has a 5 in (12.7 cm) Sharp/JDI OGS fully laminated touchscreen, with a screen resolution of 1080x1920 at 441 ppi. Its home button is similar to its predecessor and is mainly touch-based with adjustable haptic feedback. The phone itself weighs 149 grams (5.26 oz) and uses an aluminum composite frame. The device is currently available in two color finishes, black and white, and is expected to be available in various other colours in the near future like most of Xiaomi's previous devices.
The Xiaomi Mi4 is powered by the new Qualcomm Snapdragon 801 (MSM8974-AC) chipset, making it the fastest Android smartphone to date according to the AnTuTu benchmark application. Its processor is a Quad-core 2.5 GHz Krait 400 and its graphics card is an Adreno 330.
The phone includes a 3080 mAh battery, which provides 280 hours of standby time. The battery is contained inside of a compartment with an exchangeable back plate.
The Xiaomi Mi4 was announced with a complementary US$12 smart-accessory known as the Xiaomi Mi Band which is a waterproof sleep-cycle smart alarm, fitness monitor, sleep tracker and remote smartphone unlocker. It comes in various exchangeable bands and has a 30 day battery capacity.