Samsung Galaxy S4 mini GT-I9195 And I9190 Hard Reset via key combination easy trick. Follow the instructions below to remove pattern screen lock. You can use simple method to reset device on both models.
1.Power off your phone
2.Push together volume up+home key+power button
3.Select with volume keys "wipe data/factory reset" and press power to confirm
4.Select "yes___ delete all user data" and press power to confirm
5.Wait until format ends
6.Press power key to confirm "reboot"
7.Wait until the phone restarts
If your phone or tab hangs or does not responding, try to Press and hold power key about 10 seconds. It will rebooting automatically. Or try to remove and re insert the battery and SIM Card.