Karbonn A21 Hard Reset

Hard Reset:

• Press and hold VOLUME UP + POWER KEY
• now you see green screen don't release volume up key
• after 10 seconds you see red screen, now release Volume up key.
• now you see recovery options.
• select wipe data with factory reset and press power key for 2 sec.
• now select yes and press power key for 2 second.
• now reboot device.