Unlock too many pattern attempt lock if you have not remember your pattern or some one enter wrong pattern many times. When wrong pattern entered many time mobile ask for Google account to reset pattern over WiFi or 3g networks. If you have no access to internet then only Hard reset method is useful to hard reset mobile urgently. Remember all data will be lost by using this trick, so take backup before hard reset your Karbon A51 cellphone to its factory default settings.
1. Power off mobile.
2. Press and hold Volume Down + Power button together for some seconds.
3. Release Keys when logo appear.
4. Press Volume Up one time to show recovery menu.
5. Select with volume keys “Clear Flash” and press power to confirm.
6. When format complete reboot mobile to complete the method.