How to factory reset IRBIS SP571? How to wipe all data in IRBIS SP571? How to bypass screen lock in IRBIS SP571? How to restore defaults in IRBIS SP571?
The following tutorial shows all method of master reset IRBIS SP571. Check out how to accomplish hard reset by hardware keys and Android 8.1 Oreo settings. As a result your IRBIS SP571 will be as new and your MediaTek MT6739 core will run faster.