: Connect your tablet to a PC or a charger using a USB cable. Wait until the battery charging animation appears. Button Combination : Press and hold the Power + Volume Up buttons simultaneously. Vibration/Logo
Check if your tablet case is interfering with the buttons, preventing a clean "press and hold" action. How to Open Recovery Mode on NOKIA T21
: Wait until you see the "Powered by Android" animation followed by the charging sign on the screen. : Connect your tablet to a PC or a charger using a USB cable
If you’re doing a factory reset, choose – then confirm. To exit recovery, select “Reboot system now” . select “Reboot system now” .