Hard Reset SAMSUNG T769 Galaxy S Blaze 4G

1. First power off your device.
   
2. Next hold and press Volume Up + Volume Down + Power button.
   
3. When the phone vibrates, then release only Power button.
4. Then you will see Recovery menu, when you should select "wipe data/factory reset", and confirm with Power buttton.
   
5. Now choose option "yes" and confirm that.
   
6. After that select "reboot system now".
   

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