Is there a chaneglog about this version? Does it fix the BT drop problem?
According to en.miui.com
MIUI 7.2 China Stable ROM Full Changelog
Lockscreen, Status Bar, Notification Bar
Optimization - Optimized notifications style (11-27)
Fix - Status bar was black in some situations (12-08)
Fix - Sometimes status bar disappeared (12-24)
Fix - Power button menu could not be read out or operated on in Accessibility mode (01-12)
Home screen
Optimization - Home screen icons animated effects at unlocking (12-08)
Fix - Home screen crashed in some situations. (12-02)
Fix - When using Snow fairy theme, icons would disappear for a moment after unlocking (01-06)
Fix - Sometimes daily lockscreen did not work (01-06)
Fix - It asked to change folder name when first open the folder in Mi Space mode after rebooting (01-12)
Music
New - Added music videos section (12-16)
Optimization - In random playing mode, pressing 'Play all' in song list will not always start playing from the first song in the list (12-15)
Backup
Optimization - New design for Mi Mover (01-25)
Weather
New - Brand new Weather app. Added 24 hours forecast, air quality forecast, wind speed forecast (12-11)
File Explorer
New - Double tapping top bar will go to the top of the page (12-08)
Optimization - Optimized data source analysis for images using quick URL (11-23)
Optimization - 'Forgot password' option will show after entering wrong password for private folder repeatedly (12-02)
Optimization - A confirmation prompt will show before setting a folder as private (12-08)
Optimization - Optimized search function to show more information of search results (12-08)
Fix - Unrecognizable file names after ZIP files are decompressed (11-30)
Fix - Private folders could not be decrypted (12-08)
Data Usage
Optimization - Data connection will be disabled if extra data plan is also used up after the original data plan reached its limit (01-11)
Mi Drop
Fix - Status bar always showed 0% when receiving files using Mi Drop (12-02)
Fix - Sometimes WiFi did not connect after files were sent (12-10)
Cleaner
New - Support adding apps to exception list in one press (11-30)
New - New version of Deep clean. Added available storage space (12-15)
New - New version of photos cleaning feature. Added duplicate photos/accidental photos/under and overexposed/screenshots sections (12-15)
New - Added 'save the sharpest photos' option when cleaning duplicate photos (12-15)
New - Deep clean supports cleaning APK. files (01-05)
New - Deep clean supports managing videos (01-05)
Optimization - Logic of defining rarely used apps (12-15)
Fix - Errors in calculating sizes of deep clean big files (01-05)
Mi Cloud
New - Added account lock after flashing phone in Find device. Avoid risks of lost phone being used by others (12-22)