In order to hard reset a Karbonn A15, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Karbonn A15 device will be brought back to the default configuration of a brand new device.
1. Lets begin. Please press the Power button in order to turn your phone on.
2. Now press and hold the Power and Volume Up buttons until the screen turns red.
3. Now hold down the Home button until an Android logo comes on screen.
4. Choose the wipe data/factory reset option. Confirm by tapping Yes.