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Custom ROM in Mi A2

Revert back to stock Android in Mi A2

This tutorial assumes that, Ubuntu Touch is installed successfully, and now it is desired to revert to stock ROM. Read how to Flash Ubuntu Touch for more detail about basic procedure.

Requirements

  1. SDK Platform Tools (Download Link)
  2. Stock Android ROM for Mi A2 (Download Link)
  3. Xiaomi Mi A2 with TWRP recovery installed.
  4. Windows or Linux (preferably) PC.

Process

Step 1 : Boot the phone in Fastboot mode and connect it using correct USB cable.

Step 2 : Open up a Terminal in the directory which has SDK platform tools. Check if the files fastboot and adb are executable or not. If not, type chmod u+x fastboot to make it executable.

Step 3 : Once the phone is in Fastboot mode, check which slot is active. There are two slots A and B and you have to flash the ROM in both the slots. To check type, 

./fastboot getvar current-slot

Step 4 : To change the slot type, 

./fastboot --set-active=<a|b>
Step 5 : Once correct slot is picked, boot in TWRP using, 
./fastboot boot ~/Downloads/twrp-3.5.2_9-0-jasmine_sprout.img
Step 6 : In the TWRP menu, select Advanced > ADBsideload and then type in the Terminal 
./adb sideload ./jasmine_sprout_stock_android9.zip

Step 7 : Once the flashing of the image in the slot is done, reboot the system in Fastboot and repeat the process but change the slot from the earlier slot.

Once this is done, simply reboot the system and stock ROM would be installed now.

  • For me the name of TWRP image was twrp-3.5.2_9-0-jasmine_sprout.img the stock ROM was jasmine_sprout_stock_android9.zip. The name should be changed accordingly.
  • Sometimes the system might ask for factory reset. Use the volume keys to navigate the options and power key to select the choice.
  • Any custom ROM can be flashed in the same fashion as above. List of Best Custom ROM for Xiaomi Mi A2