Prerequisite:
- Deeptest APK (..choose appropriate android version, RUI2 or RUI3.)
- ADB/Fastboot installed in your Desktop.
- Platform Tools (...latest version preferrably.)
- Do necessary backup of all your important files.
Steps:
- Toggle on USB Debugging and OEM Unlocking in Developer's option.
- About Phone > Version > Tap
Build Number
up to 7 times to access Developer's Option.
- About Phone > Version > Tap
- Install Deeptest APK, make sure to install right app based on your android version.