Hard Reset TENGDA S1

How to factory reset TENGDA S1? How to wipe all data in TENGDA S1? How to bypass screen lock in TENGDA S1? How to restore defaults in TENGDA S1?

The following tutorial shows all methods of master reset TENGDA S1. Check out how to accomplish Hard Reset by hardware keys and Android 4.2 Jelly Bean settings. As a result your TENGDA S1 will be as new and your MediaTek MT6582 cores will run faster.

How to hard reset TENGDA S1

1. For this operation, you should turn your TENGDA S1 off, so hold down Power Key for a few seconds to do that.
2. Wait till your device turns off completely, and then hold down combination Power Key + Volume Up for about 5 seconds.
3. After you see Android robot appeared on screen, you have to hold down Power Key and press Volume Up once.
4. In the appeared menu, select option "wipe data/factory reset", using Volume Keys to navigate and Power Key to select.
5. Next you should confirm this operation by tapping on "Yes -- delete all user data".
6. Wait till data wipe completes, and after that you should select option "reboot system now" to restart your smartphone.
7. Your TENGDA S1 will be restarted within a few minutes after that, and that's it.