If you have installed a custom recovery like TWRP (Team Win Recovery Project) on your Nokia T21, the process is very simple.
Used by technicians to verify screen and GPU health.
: Plug the tablet into a computer or a wall charger using a USB cable.
The recovery key combination will not work if the device is in sleep mode or restarting. Press and hold the on the side of the tablet. Select Power Off from the on-screen menu.
If you have a computer with ADB installed, you can use it to open Recovery Mode on your NOKIA T21. Here's how:
Clears temporary system files without losing personal data. (Note: This option may be hidden on certain Android versions utilizing seamless dynamic partitions).
The official Android Recovery Menu will now display on your screen in a text-based format. Navigating and Using the Recovery Menu
Android utilizes Factory Reset Protection (FRP). If you wipe the device via recovery, you must log in with the Google account previously linked to the tablet to unlock it. Step-by-Step Guide: Booting Nokia T21 into Recovery Mode
Before you start, make sure you have:
To protect your information, follow these steps first:
Here is what the most common options do:
Access the Recovery interface.
This is a hidden safety feature to prevent accidental entry.
If your tablet is functional, back up your photos, documents, and accounts. A factory reset in recovery mode permanently deletes all local files.