How to factory reset ETULINE S4521? How to wipe all data in ETULINE S4521? How to bypass screen lock in ETULINE S4521? How to restore defaults in ETULINE S4521?
The following tutorial shows all method of master reset ETULINE S4521. Check out how to accomplish hard reset by hardware keys and Android 4.2 Jelly Bean settings. As a result your ETULINE S4521 will be as new and your MediaTek MT6572 core will run faster.
ETULINE S3521 HARD RESET . ОБШИЙ СБРОС - video