Hard Reset SAMSUNG D700 Epic 4G

First method:

1. Remove and insert the battery.
2. Next hold and press Volume Down + Camera button + Power button.
   
3. When Samsung logo appears release only Power button.
4. Now browse to option "wipe data/factory reset" with Volume Down, and accept with Home button.
   
5. Select "yes" from the menu, and confirm with Home button.
   
   
6. Afterwards press Home button to enter option "reboot system now".
   

Second method:

1. Make sure, that your device is on.
2. Then press Up arrow -> Menu -> Settings -> Privacy -> Factory data reset.
   * You will see a disclaimer.
3. Now read information and tap Reset Phone.
4. Next select Erase everything.

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