Hard Reset Samsung Galaxy A3
If you are having issues with your A3, you can easily try to hard reset. First of all, go and turn off your smartphone by holding down the power button long enough.
Next, press and hold power, volume up and home screen buttons together and thus enter recovery mode.
Now use the volume down button and navigate to the wipe data/factory reset. Press the power button to confirm it.
Now navigate to the Yes –delete all user data and press the power button again to confirm the choice.