MIUI (pronunciation: Me You I; is UI for Mi) is a mobile UI (User Interface) developed and maintained by manufacturer Xiaomi exclusively for its Smartphone and related communication devices. MIUI is based on the Android Open Source Project (AOSP) version of Android, and serves as the basis for other operating systems created by Xiaomi: MIUI for POCO, MIUI Pad, MIUI Watch, MIUI TV (PatchWall), Redmi and Redmi Note.

There are different versions for each Xiaomi phone model, and each version has variants according to the regions in which the phone is sold, inclusing China, Europe, Indonesia, India, Japan, Pakistan, Russia, Taiwan and Turkey. Xiaomi have also released a few devices running Google's Android One instead of MIUI. Xiaomi devices usually get three Android version updates, but get MIUI updates for four years (less for budget models).

The first MIUI ROM, released in 2010, was based on Android 2.2.x Froyo and was initially developed in Chinese by Xiaomi in its first year. Xiaomi added a number of apps to the basic framework, including Notes, Backup, Music, and Gallery apps.

An organisation named Xiaomi Europe and using Web domain xiaomi.eu, working officially with Xiaomi but not affiliated with the Chinese company, was set up in 2010 as a community for English-language Xiaomi phones running MIUI associated with an Android version. xiaomi.eu issues its own stable and weekly versions of Xiaomi MIUI ROMs, based on the stable, and weekly beta versions of the Chinese ROM. Installing the xiaomi.eu ROM voids the warranty on Xiaomi phones; according to the xiaomi.eu leader, the official ROM must be flashed and the bootloader locked before returning a device for warranty repair.

Xiaomi is currently replacing MIUI with its new Android-based operating system named HyperOS, which will debut on Xiaomi 14 series.

MIUI and Google Play services 
Google has had disagreements with the Chinese government, and the Great Firewall blocks access to many Google services.
MIUI does not ship with Google Play Services in mainland China. However, Xiaomi has expanded its operations outside China; MIUI releases for Android devices outside mainland China have Google Play Services and Google Apps such as Gmail, GMaps, YouTube and Google Play pre-installed and functioning as on any other Android device. MIUI global versions are certified by Google.

Comparison of all MIUI variants

MIUI vs Android 
Although the MIUI is built on the Android platform, the default user interface of its earlier iterations resembled iOS due to the absence of the application tray, with a grid of icons arrayed in the home panels. Other iOS similarities include the app icons being in a uniform shape, the dialer and in-call interface, the organization of the Settings app, and the visual appearance of toggles in the UI. This prompted some observers to cite how the devices running on MIUI could appeal to iOS users wanting to switch to the Android platform. By 2018, MIUI was increasingly shifting towards a design aesthetic more similar to the stock Android. For instance, several elements in the MIUI 10 build resemble Android Pie features such as the multitasking menu and gesture controls. This change was first seen in the MIUI 9 (ver. 8.5.11) that shipped with the Xiaomi Mi MIX 2S. The MIUI firmware already looked like stock Android P.

Another difference from Android is the MIUI's support for themes and custom fonts. Users can download theme packs and fonts, which can change the user interface of the device once installed from the Mi Themes Store. It allows advanced users to tweak the hard-coded firmware of their handsets.

Issues 

MIUI's kernel was proprietary, and in breach of Linux kernel's GPL. Source code for certain components was released to GitHub on 25 October 2013. Kernel sources for a few devices, including the Mi3, Mi4, MiNote, and Redmi 1S, were released in March 2015.

In order to raise funds for the company, MIUI has its own online services from Xiaomi, including cloud services, paid themes and games. Payments are transacted using the Mi Credit digital currency.

After the government of India banned over 100 Chinese apps and services in 2020 due to national security and privacy concerns, including some made by Xiaomi, the company developed a MIUI version without them for India.

Vulnerabilities 
In April 2019, security researcher Arif Khan reported that Xiaomi's browser apps Mi Browser and Mint Browser suffered from a vulnerability that allowed the URL address bar to be spoofed, which affected Indian as well as certain global versions of MIUI. Xiaomi gave Khan a Bug bounty program but opted not to fix this issue. In addition, a vulnerability in a wallpaper carousel app Glance on Indian versions of MIUI allowed a user to bypass the lock screen and access clipboard data. This vulnerability was eventually fixed by Xiaomi.

Performance issues 
MIUI offers great usage until a point. Users complain about overheating, slow performance, drop in framerate, unstable app function and randomly missing files on the phone storage. Compared to MIUI 12.5, the custom skin brings in several performance improvements and adds numerous features.

Version history

See also
 List of custom Android distributions
 Comparison of mobile operating systems
 List of free and open-source Android applications

References

External links
 Chinese official website
 English official website

Custom Android firmware
Embedded Linux
Mobile Linux
Cloud clients
Mobile operating systems
Free mobile software
Xiaomi
Chinese brands
Linux distributions
미유아이(MIUI)는 안드로이드 오픈 소스 프로젝트 (AOSP)를 기반으로 샤오미에서 개발한 안드로이드 기반 커스텀 펌웨어이다. 미유아이라는 이름은 "Me You I"의 발음과 유저 인터페이스의 약자로 통용되는 UI에서 따왔다고 한다.

특징 
스마트폰을 사면서 기본 탑재되는 애플리케이션 중에 디램을 많이 소모하는 애플리케이션이나 사용 빈도가 낮은 애플리케이션을 모두 삭제하고 필요한 기본 앱만 깔려 있다. 이 커스텀 펌웨어는 애플의 iOS 같은 유저 인터페이스(UI)를 제공한다.

개발 
현재 공식 MIUI 개발팀은 400명이 있으며, 매주 금요일 MIUI 공식 지원 기기의 업데이트를 빌드한다. 오픈소스라는 안드로이드와는 반대로 미유아이는 클로즈드 소스이다.

MIUI 버전 
 MIUI V1,V2 - CM6 기반 (개발 중단, 배포 중단)
 MIUI V3 - CM7 기반 (개발 중단, 배포 중)
 MIUI V4 - ICS, JB AOSP 기반 (개발, 배포 중)
 MIUI V5 - JB 기반 (개발, 배포 중)
 MIUI 6 - KK,LP(5.0.X)기반 (개발, 배포 중)
 MIUI 7 - KK,LP(5.0.X)(5.1.1),M(비공개beta)기반 (개발, 배포 중)
 MIUI 8 - 안드로이드M (개발,배포중)또는 안드로이드N (개발,배포중)
 MIUI 9 - 안드로이드 N로 출시 함 (개발중,배포중),안드로이드 O버전 출시 (개발중,개발자룸 모집중)(※단 미6만)
 MIUI 10 - 안드로이드 o,p버전 출시 6월 최신폰 업데이트 7월 구폰 업데이트

개발팀 공식 지원 기기 
미유아이의 지원기기는 대부분 로컬라이징이 되지 않은 글로벌 폰을 대상으로 제공된다. (굵은 글씨는 기본으로 한글을 지원하는 기기)

진저브레드 

HTC
 넥서스 원
 디자이어
 HD2
 디자이어 HD
 디자이어 Z
 디자이어 S
 인크레더블 S

모토로라 모빌리티
 모토쿼티
 디파이

삼성전자
 갤럭시 S - 해외판

LG전자
 옵티머스 2X - 해외판
 LG 옵티머스 블랙 - 해외판

아이스크림 샌드위치 

샤오미테크
 샤오미폰

삼성전자
 넥서스 S
 갤럭시 넥서스
 갤럭시 S II
 갤럭시 S III

HTC
 센세이션 / 센세이션 XE
 원 X
 원 S
 디자이어 S
 인크레더블 S
 HTC EVO 3D - GSM 버전

소니에릭슨
 아크 / 아크 S
 엑스페리아 S

모토로라 모빌리티
 드로이드 레이저

화웨이
 아너(Honor)
 어센드 P1 (Ascend P1)

젤리빈 

삼성전자
 넥서스 S
 갤럭시 넥서스

에이수스
 넥서스 7

MIUI 6 

샤오미
 Xiaomi Mi 4
 Xiaomi Mi Note
 Xiaomi Mi Pad
 Xiaomi Mi Note Pro
 Redmi 2
 Xiaomi Mi 4i
 Redmi Note
 Xiaomi Mi 3
 Redmi 1S
 Redmi 1
 Xiaomi Mi 2/2S

구글
 Google Nexus 4
 Google Nexus 5

HTC
 HTC ONE
 HTC One (M8)
 HTC One S(S4)
 HTC One S(S3)

삼성
 Samsung S3 SC03E
 Samsung I9300
 Samsung Galaxy S5
 Samsung Galaxy J
 Samsung N7105
 Samsung Note3 N9005
 Samsung I9308
 Samsung N9008V
 Samsung I9305

화웨이
Huawei Honor 3C (4G)
Huawei Honor 6

소니
Sony Z2
Sony L36h
Sony Z1
Sony Xperia Ion

LG
LG G2
LG G Pro
LG G

ZTE
nubia Z7 mini
nubia Z5S
ZTE Redbull
nubia Z5S mini
ZTE U988s
ZTE Grand SII
nubia Z5 mini
ZTE Star 1
OPPO Find 5
OPPO Find 7

OnePlus One

정식 탑재된 스마트폰 
MIUI가 정식으로 탑재된 스마트폰은 MIUI가 OS 역할을 하며 따라서 샤오미 전 기종이 MIUI가 탑재되어 출시된다. 하지만 미a1은 순정 안드로이드 탑재함

구글과의 소송전 
MIUI는 초기 개발 때부터 구글 앱스(Google Apps)를 탑재하고 배포하였다. 본래 안드로이드 시스템을 완벽히 이용하려면 구글앱스가 필수적으로 탑재되어야 하지만, 구글의 저작권 침해문제로 인해 CM 개발 팀들도 구글 앱스를 업데이트 스크립트로 제작하여 따로 배포하고 있다. 그러나 MIUI는 기본 탑재를 방침으로 하여 계속 배포하였고, 구글과 MIUI 개발 팀은 저작권 문제를 가지고 민사소송을 진행하였고, 결국 장기소송전에 지친 미원 팀은 구글에게 정식 허가를 받고 구글앱스를 탑재할 수 있게 되었다.

각주

외부 링크 
 미유아이 공식 홈페이지
 미유아이 커스터밍 홈페이지

커스텀 안드로이드 펌웨어
자유 모바일 소프트웨어
중국의 브랜드
클라우드 클라이언트
모바일 리눅스