How to factory reset CELKON A21? How to wipe all data in CELKON A21? How to bypass screen lock in CELKON A21? How to restore defaults in CELKON A21?
The following tutorial shows all method of master reset CELKON A21. Check out how to accomplish hard reset by hardware keys and Android 4.2 Jelly Bean settings. As a result your CELKON A21 will be as new and your MediaTek MT6582 core will run faster.