How to factory reset TENGDA N9389? How to wipe all data in TENGDA N9389? How to bypass screen lock in TENGDA N9389? How to restore defaults in TENGDA N9389?
The following tutorial shows all method of master reset TENGDA N9389. Check out how to accomplish hard reset by hardware keys and Android 4.2 Jelly Bean settings. As a result your TENGDA N9389 will be as new and your MediaTek MT6589 core will run faster.