How to enter ANDROID SYSTEM RECOVERY ?
1. Turn off your device, then press and hold Volume UP (+) button  followed by pressing
the power button altogether.
2. Upon seeing the image shown below, you may now let go of your fingers (both holding
the volume and power button).
3. Again, this time, press and hold down power button followed by the Volume UP (+)
button.
4. Upon seeing the image shown below, you may now let go of your fingers (both holding
the power and volume button). Then press Volume DOWN (-) button and select “wipe
date/factory reset”, press power button to enter the selection.
5. When prompted to screen shown below, press volume DOWN (-) button and select
“Yes—delete all user data”, then press power button to enter selection.
This action will
wipe all use data stored in the system.
6. After system has finished deleting all user data, the status will be displayed as “Data wipe
complete.” Then will proceed to step 7 once done.
7. Select “reboot system now”, then press power bottom to system restart.