Hard Reset TENGDA S9800

How to factory reset TENGDA S9800? How to wipe all data in TENGDA S9800? How to bypass screen lock in TENGDA S9800? How to restore defaults in TENGDA S9800?

The following tutorial shows all method of master reset TENGDA S9800. Check out how to accomplish hard reset by hardware keys and Android 4.2 Jelly Bean settings. As a result your TENGDA S9800 will be as new and your MediaTek MT6592  core will run faster.

First method:

  1. Turn off the device by holding the Power rocker.Hard Reset TENGDA S9800
  2. Afterwards press and hold together Volume Up and Power button for a few seconds.HardReset TENGDA S9800
  3. You should release held keys when you see the Android Robot.
  4. To enter the Recovery Mode hold down the Power key for a short while.Hard Reset TENGDA S9800
  5. In the next step use the Volume buttons to select "wipe data/factory reset" and tap the Power button to confirm.Factory Reset TENGDA S9800
  6. Then choose "yes" from the menu, and accept it with Power button.
  7. After a while accept option "reboot system now" using Power rocker.Factory Reset TENGDA S9800
  8. That's all. The hard reset operation should be completed.

Help! This doesn't work