How to factory reset TENGDA A9? How to wipe all data in TENGDA A9? How to bypass screen lock in TENGDA A9? How to restore defaults in TENGDA A9?
The following tutorial shows all method of master reset TENGDA A9. Check out how to accomplish hard reset by hardware keys and Android 4.4 KitKat settings. As a result your TENGDA A9 will be as new and your MediaTek MT6582 core will run faster.