- Turn off your phone
- Remove the battery for 5 sec
- Put the battery back
- Press and hold the volume up button and the power button together.
- Release both buttons as soon as you see the recovery Manu pops-up.
- Use the volume buttons to navigate
- Scroll down to "wipe cache" and press the power button to confirm selection.
- Reboot the phone when done.
Please note that' data wont enable for as long as airplane mode is turned on.
Please comment below for further assistance.