Hard Reset SAMSUNG I9500 Galaxy S4

First method:

1. Power off your phone.
   
2. Press together Volume Up + Home button + Power button.
   
3. When you see Samsung logo leave only Power button.
4. If you see menu of Recovery mode, then release rest buttons.
5. Select "wipe data/factory reset" with Volume buttons.
   
6. Press Power button to confirm.
7. Select "yes" with volume buttons.
   
8. Press Power button to confirm.
   
9. Wait untill format is complete.
10. Select "reboot".
    
11. Wait until the phone restarts.

Second method:

1. Power on your device.
   
2. Open the dial pad on your phone and enter: *2767*3855#
3. Now your phone will reset and restart.
4. Done!

Third method:

1. Make sure, that your phone is on.
   
2. Go in to Menu.
3. Choose Settings -> Back up and reset -> Reset device -> Delete all.
4. Confirm all informations, and wait until your phone will reset and reboots.
5. Finito!

WARNING !
Hard Reset will erase all of your data
All described operations you are doing at your own risk.