How to factory reset CHANGHONG M688? How to wipe all data in CHANGHONG M688? How to bypass screen lock in CHANGHONG M688? How to restore defaults in CHANGHONG M688?
The following tutorial shows all method of master reset CHANGHONG M688. Check out how to accomplish hard reset by hardware keys and Vendor settings. As a result your CHANGHONG M688 will be as new and your core will run faster.
Hard Reset will erase all of your data
All described operations you are doing at your own risk.