How to Samsung I9001 Galaxy S Plus hard reset:

Samsung I9001 Galaxy S Plus hard reset quit RAMDUMP mode

 Your all will be lost:
1. Phone turned off. Plug in USB cable first.
2. PRESS AND HOLD VOLUME UP + POWER Buttons (or step 2 press VOL UP and DOWN + POWER )
3. When you see Samsung LOGO release buttons, then press MENU button (lower LEFT) when you see android figure.
If that not working
(Press these 2 buttons VOL UP and HOME + press Power button for 2-3 Seconds)

                                             or

1. Menu 
2. Settings 
3. Privacy 
4. Factory Data Reset 
5. Reset phone 
6. Erase everything.