How to factory reset GRETEL A9? How to wipe all data in GRETEL A9? How to bypass screen lock in GRETEL A9? How to restore defaults in GRETEL A9?
The following tutorial shows all method of master reset GRETEL A9. Check out how to accomplish hard reset by hardware keys and Android 7.0 Nougat settings. As a result your GRETEL A9 will be as new and your MediaTek MT6737 core will run faster.
Mở Khóa Màn Hình Máy Gretel G9. - video