How to factory reset BLU J4? How to wipe all data in BLU J4? How to bypass screen lock in BLU J4? How to restore defaults in BLU J4?
The following tutorial shows all method of master reset BLU J4. Check out how to accomplish hard reset by hardware keys and Android 8.0 Oreo settings. As a result your BLU J4 will be as new and your core will run faster.