Used by technicians to verify screen and GPU health.
: Useful for diagnosing screen or GPU issues. Alternative: Reset via Settings How to Open Recovery Mode on NOKIA T21
If Method 1 does not work (which is common on newer Nokia tablets due to updated Android security), use this method involving a computer. Used by technicians to verify screen and GPU health
: Erases all user data to restore the tablet to factory settings. How to Open Recovery Mode on NOKIA T21
: When the device vibrates or the Nokia/Android logo appears, release the Power button but continue to hold Volume Up .
: Simultaneously press and hold the Power button and the Volume Up button .