Hard Reset SAMSUNG I909 Galaxy S

First method:

1. Power on the phone.
   
2. Then tap this secret code: *2767*3855#
3. Wait until your phone restarts.

Second method:

1. Make sure, that your device is off.
   
2. Now press and hold Volume Up + Home button + Power button.
   
3. Next select option "wipe data/factory reset" with Volume buttons, and accept with Power button.
   * If Power button doesn't work, then press Home button to confirm operations.
   
4. Then choose "yes" with Volume Down, and press Power button to accept operation.
   
5. Afterwards confirm operation "reboot system now".
   

 

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