How to factory reset IRBIS SP552? How to wipe all data in IRBIS SP552? How to bypass screen lock in IRBIS SP552? How to restore defaults in IRBIS SP552?
The following tutorial shows all method of master reset IRBIS SP552. Check out how to accomplish hard reset by hardware keys and Android 7.0 Nougat settings. As a result your IRBIS SP552 will be as new and your MediaTek MT6737 core will run faster.
Hard Reset will erase all of your data
All described operations you are doing at your own risk.