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Realme C11/ C12/ C15/ C20/ C21 (mediatek) | Downgrade Realme UI 2 to RUI1

Step by step guide how to downgrade Realme C11/C12/C15 (mediatek) fom Realme UI version 2 to version 1 using TWRP.  Phone must be unlock bootloader.


Prerequisite

  • Use at your own risk! I am not responsible for your actions
  • Unlock bootloader is a must
  • Backup EFS Modem
  • Use the provided Xiaomi firmware update

Video Tutorial 

Files

Instruction

  • Unlock Bootloader use the indepth test apk
  • Go to fastboot (press and hold >>> power+volume down)
  • open command prompt in C:\ADB and Fastboot then type this code one by one carefully
  • fastboot -w
  • fastboot erase userdata
  • fastboot --disable-verification flash vbmeta vbmeta.img
  • fastboot flash recovery filename.img
  • fastboot reboot bootloader
  • fastboot reboot recovery
  • backup nvram , nvdata, nfcfg
  • Select ‘Skip Treble Compatibility error’ in Settings
  • Flash RUI 1 ozip
  • reboot recovery
  • Format Data and wipe cache
  • Reboot