LENOVO S820 MIUI

 [Calendar]
 Fix – When switching languages, user was not able to switch time zones properly

 [Security Center]
 Optimization – After you exit Do Not Disturb mode, unread indicators will be cleared 
 Fix – Sometimes virus scan would FC

 [Video]
 Optimization – Merged Video and Video player apps
 Fix – When playing video on a DLNA device, the name displayed by the Video player and the name displayed in the list were different

 [Weather]
 Optimization – Notifications for weather forecasts are enabled by default
 Fix – Sometimes weather data would not be displayed in the correct language after user switched system languages

 [Home screen]
 New – New Edit Home screen interface
 New – View the notificiation shade by swiping down anywhere on the Home screen
 Optimization – Previewing Home screens uses less system memory
 Fix – When user created a shortcut without a name, FC would occur

 [Phone]
 Fix – Sometimes the switch for auto IP identification would display incorrectly

 [Gallery]
 New – Album thumbnails of screen shots will be detected automatically
 Fix – User could not delete albums that they had shared with themselves
 Fix – When Wi-Fi was disabled, photo downloads would be canceled
 Fix – User could not copy photos to shared albums
 Fix – When user rotated phone photo would not maintain its scale or position

 [Contacts]
 New – Added English for importing contacts via Bluetooth

 [Gallery]
 Optimization – Uploaded video names will not display the file extension

 [Weather]
 Optimization – If a city name hasn't been translated into the current system language, it will be replaced by the local language automatically
 Optimization – Sharing features are now the same as system sharing features
 Optimization – Weather warnings are only displayed when system language is set to Simplified Chinese
 Optimization – More ways to share Weather info
 Fix – After switching system language, Weather widget would display incorrectly

 [Lock screen, Status bar, and Notification shade]
 Optimization – Custom notifications will now change along with system language

 [Video]
 New- Mi Link function notification
 Optimization – For Mi Link, when there is only 1 device, it will be displayed directly onscreen

 [Messaging]
  Fix – Marking all notification messages as read will not affect private messages anymore

 [Gallery]
  New – Move pictures to other albums
  Fix – Some bmp pictures with the jpg. extension cannot be set as wallpaper
  Fix – Sometimes there's no response when download original pictures or videos

 [Music]
  New – Support using MiCredits to buy higher quality online music

 [Weather]
  Fix – Weather widget cannot update timely after deleting locations in weather app
  Fix – Some themes cannot get weather data

 [Downloads]
  New – Added Xunlei engine, increasing downloading speed by 70%

 [Video]
  Fix – When watching online videos, connect device with computer will cause the video to reload
  Fix- Sometimes offline videos cannot pause
  Fix – When downloading offline video, click on the video name on status bar will not lead to the correct video

[Lock screen, Status bar, and Notification shade]
 Fix – For 1080p display devices, the lock image wasn't displaying correctly at the lock screen

 [Home screen]
 Fix – When system language was set to traditional characters (Taiwan), “??” was displayed as "Uninstall"

 [Contacts]
 Fix – When user had too many contacts, group delete function would fail

 [Gallery]
 Fix – Going to Settings > Display > Screensaver, would cause app to FC

 [Messaging]
 Optimization – Right arrow added to notification message groups
 Optimization – When you pin a notification message, it will be displayed at the top of the message list view

 [MiCloud App Backup]
 New – User can stop (pause) ongoing backup or restore processes
 Optimization – User can resume paused backup and restore processes
 Optimization – List of completed uploads is automatically displayed during next upload 
 Fix – Too many "Other devices" were displayed

 [Music]
 Fix – In Settings, the Filter by folder function wasn't displaying correctly
 Fix – In File Explorer, when demoing a music file, if headphones were disconnected, the Play button did not refresh

 [Phone]
 Fix – 3G signal transition issues

 [Security]
 New – Security center now includes Optimize, Cleaner, Data usage, Blocklist, Power settings, Virus scan, and Permissions (7 features)
 Optimization – Improved Data usage calibration success rate

 [Settings]
 New – Default app settings

 [Weather] 
 New – New version of weather data module

 [Messaging]
 Optimization – When a notification message is "pinned", it will appear at the top of the main list in Notes
 Fix – When user chose to respond to an incoming call with a Quick response and touched "Compose", app would FC

 [Downloads]
 Optimization – Two items can be downloaded at once
 Fix – When user changed system language, app would FC

 [Notes]
 Fix – Sometimes the horizontal line shading and images in notes would not be aligned properly

 [FM Radio]
 Optimization – Canceled requirement to connect headphones before user could use Radio (connecting headphones improves performance)

 [Recorder]
 Fix – Fixed a problem that led to app quitting unexpectedly

 [Security]
 Fix – Sometimes virus scan details would display incorrectly

 [Themes]
 New – "My account" tab added on the "My themes" page
 Fix – Sometimes when user applied a theme immediately after purchasing, app would FC

 [Video]
 Optimization – Faster discovery for DLNA equipment
 Optimization – "My videos" list is displayed with the most recent videos at the top
 Fix – Videos that were hidden, were still displayed in player history
 Fix – When editing files, user couldn't select the first file in the folder
 Fix – User couldn't take screen shots when watching some locally stored videos
 Fix – Sometimes the player history would be saved incorrectly
 Fix – Sometimes videos couldn't play in full-screen
 Fix – Sometimes after user quit video app, it would keep running in the background

 [Weather]
 New – New version of weather data module

 [Phone]
 Fix – When user was answering call, the status of the upper Status bar was irregular

 [Locks screen, Status bar, and Notification shade]
 Optimization – The push icon displays pushed apps' icons

 [Home screen]
 Optimization – Improved Gaussian blur effect for 1080p devices

 [Browser]
 Optimization – When a page is added to the Useful tab, the corresponding shortcut square's background is the same color as the page's (11-27)

 [Music]
 Optimization – MiSound prompt added
 Fix – Sometimes playing default video would cause FC

 [Downloads]
 Fix – Sometimes changing the system language would cause app to FC

 [Gallery]
 New – Cloud images can be played as slide show
 New – User can share cloud images using third-party apps
 Optimization – Faster loading time for start page and local images page
 Optimization – Screen saver settings moved to system settings
 Fix – When Gallery was open, the bar along the bottom of the screen would flicker
 Fix – Sometimes an error would cause cloud images to increase to over 1000
 Fix – When user closed cloud album, cloud album images would still be displayed as screen saver
 Fix – The on the local storage page, the phone's internal storage and external SD card were being displayed with the same name

 [Themes]
 Fix – Themes with incompatible components cannot be applied

 [Video]
 Optimization – Improved display for details page when viewing with lager system font sizes
 Optimization – When DLNA devices are found, they are displayed in the same directory
 Fix – Sometimes, when coming from the player interface, the details page would FC
 Fix – When system was set to English, some menu titles were still displayed in Chinese
 Fix – When user tapped search button, two loading animations would appear
 Fix – Sometimes app would FC in list view

 [Weather]
 New – Weather data for cities out side of China added
 New – Inclement weather warning feature
 New – Trends data now includes weather data from the previous day
 Optimization – Improved weather animation for clouds at night
 Optimization – User can swipe between pages
 Fix – Some themes couldn't get weather data

 [Security Center]
 Optimization – Increased efficiency for virus scans using cloud definitions
 Fix – After virus scan, app names and icons weren't displaying properly in virus detail list
 Fix – When system language was set to English, part of the Power settings interface was still in Chinese
 Fix – When cleaning up trash, checking for large install packages would cause FC
 Fix – Sometimes in Permissions, when user was looking at logs, app would FC
 Fix – Sometimes during "Clean up" process app would FC
 Fix – Sometimes the number of items cleaned up would display "-1"
 Fix – Sometimes changing configurations in Power settings would also enable vibrate
 Fix – When using a custom power configuration, notification sound on touch feature didn't work
 Fix – Sometimes in the auto-clean configuration for cache, the "Never" setting didn't work
 Fix – Sometimes power configuration would continuously change back and forth between Sleep and Default

[Contacts]
 Fix – In some cases, delete account after entering the contact’s details page causes FC errors
 Fix – New SIM contacts can not be displayed immediately after adding card

[Lock screen, status bar, notification bar]
 Fix – In some cases, long pressing the power button for dialog menu, Airplane mode does not initialise

[Gallery]
 New – Gallery Cloud album sharing

[Music]
 Optimisation – Opening music, click on “all the songs play in order” not to enter the music player interface
 Fix – In some cases, the Home tab below the indicator arrow shows the wrong details

[Settings]
 Optimisation – DND mode “schedule” time modified to 23:00 and morning 7:00
 Optimisation – Add to DND mode by caller frequency

[FM Radio]
 New – Favourite stations list in FM app

[Other]
 Fix – Changing theme calculator digital display caused errors