KARBONN A9+ HARD RESET

[-switch off
-press vol up and power on key together (it takes pretty long time)
-You will enter green screen, but need to press the power key again
-Now you will enter the red screen.
-There on your android will appear and all the options too.
-For selecting use the volume up and down keys, but to select an entry you need to press the power on key for a little longer.

Power on and vol down key will probably lead you to download mode.

do factory reset & its done