How to factory reset IRBIS SP455? How to wipe all data in IRBIS SP455? How to bypass screen lock in IRBIS SP455? How to restore defaults in IRBIS SP455?
The following tutorial shows all method of master reset IRBIS SP455. Check out how to accomplish hard reset by hardware keys and Android 7.0 Nougat settings. As a result your IRBIS SP455 will be as new and your MediaTek MT6737M core will run faster.
Hard Reset Irbis SP455 - video