How to factory reset TENGDA I6S? How to wipe all data in TENGDA I6S? How to bypass screen lock in TENGDA I6S? How to restore defaults in TENGDA I6S?
The following tutorial shows all method of master reset TENGDA I6S. Check out how to accomplish hard reset by hardware keys and Android 4.2 Jelly Bean settings. As a result your TENGDA I6S will be as new and your MediaTek MT6582 core will run faster.