How to factory reset BLACK FOX B4? How to wipe all data in BLACK FOX B4? How to bypass screen lock in BLACK FOX B4? How to restore defaults in BLACK FOX B4?
The following tutorial shows all method of master reset BLACK FOX B4. Check out how to accomplish hard reset by hardware keys and Android 8.1 Oreo settings. As a result your BLACK FOX B4 will be as new and your MediaTek MT6739 core will run faster.
Hard Reset Black Fox BMM533D B3 - video