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

Factory reset:
1. On the main home screen, select menu
2. Tap Settings, then Privacy
3. Select Factory data reset
4. Select Reset phone
5. Enter the password if prompted, then confirm by tapping Erase everything
Hard Reset:
1. Turn the power off. Take the battery out from the phone and reinsert it back again
2. Hold the Volume Down button
3. Press and release the Power button
4. You are now presented with a menu that allows for Fastbook, Recovery, Clear Storage, and Simlock
5. Select Clear Storage by pressing the Volume Down button
6. Press and release the Power button
7. Confirm by selecting: Volume Up for YES and Volume Down for NO
Google Nexus S 4G Restore Factory Hard Reset Format Phone.So lets start the Google Nexus S 4G Restore Factory, Google Nexus S 4G Hard Reset.Turn Off the mobile phone for few mints.Google Nexus S 4G 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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