How to factory reset CUBE U21GT? How to wipe all data in CUBE U21GT? How to bypass screen lock in CUBE U21GT? How to restore defaults in CUBE U21GT?
The following tutorial shows all method of master reset CUBE U21GT. Check out how to accomplish hard reset by hardware keys and Android 4.1 Jelly Bean settings. As a result your CUBE U21GT will be as new and your RK3066 core will run faster.