CHANGELOG 21.12.29

New - MIUI 13 update
New - Android 12 update [Redmi Note 9 Pro 5G/Mi 10T Lite, Redmi K30, Redmi K30 5G, Redmi K30i 5G, Mi 10 Lite Zoom]
New - New system font, MiSans
New - New dynamic wallpaper shows the beauty of science under the microscope
Optimization - Updated Android Security Patch to December 2021

Lock screen
Fix - "OK Google" didn't work while the screen is off

Fix - Google Lens switch wasn't visible in the Photo mode options

Fix - Disabling the "Play sound when Silent mode is turned off" option had no effect

New - Protective watermark feature allows you to protect your photos from unauthorized copying
New - Media types allow you to view images categorized by how they were taken

Optimization - Improved Mind maps experience

Warning: Camera doesn't work properly on Mi 10T Pro. We don't recommend upgrading to this version if you own Mi 10T Pro. Redmi K30S Ultra/Mi 10T camera works fine.

Tip for Android 12 devices: Because TWRP doesn't work with Android 12, the update needs to be flashed in Fastboot mode. Download the ZIP package, unpack it and run update script (without formatting data if you're moving from Android 11 ROM or with format data if you're flashing it first time).

This changelog doesn't mention all changes made by or Xiaomi.