Hard Reset TENGDA Z4

How to factory reset TENGDA Z4? How to wipe all data in TENGDA Z4? How to bypass screen lock in TENGDA Z4? How to restore defaults in TENGDA Z4?

The following tutorial shows all method of master reset TENGDA Z4. Check out how to accomplish hard reset by hardware keys and Android 4.4 KitKat settings. As a result your TENGDA Z4 will be as new and your MediaTek MT6572W  core will run faster.

First method:

  1. Start by turning off the device by holding the Power rocker. Wipe data on TENGDA Z4
  2. Next, press and hold together Volume Up and Power button for a few seconds. Format TENGDA Z4
  3. Release held keys when you see the Android Robot on the phone's screen.
  4. To enter the Recovery Mode hold down the Power key for a short while. Wipe data on TENGDA Z4
  5. In this step use Volume buttons to select "wipe data/factory reset" and tap the Power button to confirm. Restore TENGDA Z4
  6. Then choose "yes" from the menu, and accept it with Power key.
  7. After a while accept option "reboot system now" using Power rocker. Restore TENGDA Z4
  8. That's all. The hard reset operation should be completed.

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WARNING !
Hard Reset will erase all of your data.
All described operations you are doing at your own risk.
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