It will remove all the data ,contacts and apps that you installed

1. REMOVE BATTERY & PUT IT BACK
2. HOLD VOLUME UP BUTTON & MIDDLE BUTTON (HOME BUTTON)
3 WHILE HOLDING THIS TWO BUTTON PRESS POWER BUTTON AND REALEASE(PRESS POWER BUTTON ONLY ONCE)
4.IT WILL POP UP WITH HARD RESET MENU
5. SCROLL DOWN TO FACTORY RESET WITH VOLUME DOWN BUTTON THEN PRESS CENTER BUTTON OR HOME BUTTON
6. THEN PRESS VOLUME DOWN BUTTON TO SELECT YES FACTORY SETTINGS THEN PRESS CENTER BUTTON
7. SELECT REBOOT DEVICE AND PRESS CENTER BUTTON
Samsung Galaxy S I9000 Restore Factory Hard Reset Format Phone.So lets start the Samsung Galaxy S I9000 Restore Factory, Samsung Galaxy S I9000 Hard Reset.Turn Off the mobile phone for few mints.Samsung Galaxy S I9000 Remove Pattern Lock.
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Restore Hard reset will set your phone in origional factorry settings. It will remove all the data and apps that you installed. Your contacts will be removed and you have to add them again.
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