How to factory reset VSUN i9? How to wipe all data in VSUN i9? How to bypass screen lock in VSUN i9? How to restore defaults in VSUN i9?
The following tutorial shows all method of master reset VSUN i9. Check out how to accomplish hard reset by hardware keys and Android 4.1 Jelly Bean settings. As a result your VSUN i9 will be as new and your MTK6577 core will run faster.
Hard Reset will erase all of your data
All described operations you are doing at your own risk.