Screenshot of MIUI 4.3.21 (V5)
|Company / developer||Xiaomi Tech|
|Written in||C (core), C++ (some third party libraries), Java (UI)|
|Source model||Closed source (certain components are open source)|
|Latest release||4.8.8 (V5) / August 8, 2014|
|Marketing target||Firmware replacement for Android mobile devices; stock firmware for mobile devices|
|Available in||English, Simplified Chinese, Traditional Chinese|
|Package manager||Google Play (if installed) / Market / APK|
|Platforms||32-bit ARM, MIPS, x86|
|Kernel type||Monolithic, modified Linux kernel|
|Default user interface||Graphical (Multi-touch)|
|License||GNU General Public License v3
Apache License 2.0
|Official website||en.miui.com (International)
hk.miui.com (Hong Kong)
MIUI (pronounced "Me You I", a play on the common abbreviation of the words user interface as UI), developed by Xiaomi Tech, is a stock and aftermarket firmware for smartphones and tablet computers based on the open-source Android operating system. Xiaomi announced their newest Version MIUI V6 to the public on 16.8.2014. The interface competes with iOS's UI and Samsung's TouchWiz UI. XIAOMI  includes new features which will be released soon, some similar to Android's, including theming support. 
The original MIUI ROMs were based on Android 2.2.x Froyo and CyanogenMod 6 sources, and was initially developed in the Chinese language by Chinese startup Xiaomi Tech. Xiaomi added a number of apps to enhance the basic framework; those include Notes, Backup, Music, and Gallery.
Updates are usually provided over-the-air every Friday. MIUI is then translated and ported into unofficial versions in other languages by independent developers and groups of fansites. The list of supported devices may or may not be complete, and ROMs are very similar but not identical. The list of fansites can be found on MIUI's official English website.
MIUI is made up of two parts, MI and UI, where UI stands for User Interface and MI, as stated by Xiaomi Tech, stands for Mobile Internet and Mission Impossible, reflecting the obstacles encountered in starting Xiaomi Tech.
Since MIUI V4, based on Android Ice Cream Sandwich and Jelly Bean, Xiaomi added a virus scanning engine from partner company Tencent (formerly from Kingsoft, whose previous CEO was also Lei Jun) despite the opposition of many users. Methods of removing it have emerged in the MIUI China forum, since the engine was proven not to be helpful.
Also during the development of MIUI V4, Xiaomi started to remove Google services from their ROMs in order to build and monopolize its own environment of Xiaomi, including cloud services, paid themes and games (featuring MiCredit currency). Later, during development of MIUI V5, nearly all Google services were removed due to Chinese censorship laws.
Xiaomi has released nine smartphones: the Xiaomi MI-One / MI-One S, the Xiaomi MI2 / Xiaomi MI2A / Xiaomi MI-2S, the Xiaomi Redmi / Xiaomi Redmi 1S, and the Xiaomi MI3 / Xiaomi Mi3S, all of which come pre-installed with MIUI.
|MIUI version||Android version||Last or major
|Old version, no longer supported: V1||Up to Android Froyo
|Old version, no longer supported: V2||Up to Android Froyo
||N/A||N/A||Redesigned user interface|
|Old version, no longer supported: V3||2.3.x
||N/A||N/A||Redesigned user interface|
|Older version, yet still supported: V4||4.0.x - 4.1.x
||Older version, yet still supported: 3.2.22||22 February 2013||Redesigned user interface|
|Current stable version: V5||4.1.x - 4.2.x - 4.3.x - 4.4.x
||Current stable version: 4.8.15||14 August 2014||Redesigned user interface|
|Future release: V6||4.4.4
||To Be Released||16 August 2014||Redesigned user interface|
- About MIUI Video on YouTube
- 50 Beta Testers Wanted for Official MIUI for Nexus 7 II. Apply here - Beta Team - MIUI Official English Site - Redefining Android, MIUI, 2014-02-26, retrieved 2014-03-05
- MIUI V6 Launch – All Details you need to know!, Oizoioi Tech Blog, 2011-08-16, retrieved 2014-08-17
- MIUI Is a Gorgeous, Super Fast ROM for Android, Lifehacker, 2011-04-25, retrieved 2012-01-17
- Everything You Want To Know About Custom ROM, GeekPrison.com, 2011-04-25, retrieved 2012-01-17
- MIUI Official English Site, En.miui.com, retrieved 2014-02-01
- Jason Lim, MIUI, Lei Jun, TechNode, retrieved 2012-01-17
- MIUI Official English Site, retrieved 2014-04-12
- "Introduction to MIUI" (Press release). Xiaomi. Retrieved 2014-01-31.
- MIUI Official English Site, retrieved 2014-01-31
- "About Us". Xiaomi (Press release). Retrieved 3 October 2013.
- "小米的MIUI被指违反GPL许可证" (in Chinese). Solidot. 21 Nov 2012. Retrieved 6 August 2013.
- "MIUI is accused of non-compliance with open source software license, users request MIUI to be open source (MIUI被指责不遵守开源软件协议，网友要求公开源代码)" (in Chinese). tech2ipo. 21 Nov 2012. Retrieved 6 August 2013.
- "Commits". GitHub. October 25, 2013.
- Install MIUI Gingerbread Custom ROM On Google Nexus S 4G, Redmond Pie, 2011-05-24, retrieved 2012-01-17
- "Search Results for virus scanning engine".
- "Find all the Google Apps in Google installer!". Xiaomi Tech. June 9, 2013.
- Xiaomi Phone with MIUI OS: a $310 Android with 1.5 GHz dual-core SoC and other surprises, Engadget, 2011-08-16, retrieved 2012-01-17