How to factory reset IRBIS SP401? How to wipe all data in IRBIS SP401? How to bypass screen lock in IRBIS SP401? How to restore defaults in IRBIS SP401?
The following tutorial shows all method of master reset IRBIS SP401. Check out how to accomplish hard reset by hardware keys and Android 7.0 Nougat settings. As a result your IRBIS SP401 will be as new and your Spreadtrum SC7731C core will run faster.