Karbonn smart A5i Hard Reset:
1. Charge the battery 100 percent.
2 .Turn off your Karbonn Android phone.
3. Turn ON the device by pressing and holding the VOLUME UP key and the power key together.
4. Green screen will appear first, don’t release any key
5. Red screen will appear, press power key and home (left most key).
6. Select Wipe data/Factory reset.
7. Select Yes- delete all user data.
8. Hard reset is done switch ON the mobile.