Karbonn A19 Hard Reset:
1. Charge the battery upto 70 percent.
2.Turn off your Karbonn Android phone.
3.Turn ON the device by pressing and holding the VOLUME UP and Power key together.
4. Android logo with red exclamation mark appear, Press power key to derive Recovery mode.
5. Select wipe data/Factory reset using volume down and Volume up to enter.
6. Select Yes-delete all user data and Volume up to enter.
7. Hard reset is done switch ON the mobile.