Hard Reset MYSTERY MID-821

How to factory reset MYSTERY MID-821? How to wipe all data in MYSTERY MID-821? How to bypass screen lock in MYSTERY MID-821? How to restore defaults in MYSTERY MID-821?

The following tutorial shows all method of master reset MYSTERY MID-821. Check out how to accomplish hard reset by hardware keys and Android 4.2 Jelly Bean settings. As a result your MYSTERY MID-821 will be as new and your Allwinner A20  core will run faster.

First method:

  1. Power on the device by pressing the Power button for a short while. Wipe data on MYSTERY MID-821
  2. Go the Menu and find and select Settings.
  3. In the next step choose Backup & Reset and tap Factory data reset. Remove Screen Lock on MYSTERY MID-821
  4. Choose Reset device and select Erase everything to confirm the whole operation.
  5. Success! You have just performed a hard reset operation!

rating star rating star rating star rating star rating star
No rating


Hard Reset will erase all of your data.
All described operations you are doing at your own risk.
Help! This doesn't work.