Hard Reset APPLE iPhone 3G
- Press Home button, until you see Home screen.
* If this doesn't work, then power off, and turn on your device.
- Now hold and press Power button for a few seconds until a red slider appears, and then drag the slider.
- Then you should press and hold Power button until you see the Apple logo.
* If this doesn't work, then reset your handset.
A: How to Erase and Factory Reset an iPhone 4S / 4 / 3GS / 3G - How to Use My iPhone Tutorial 3 - video
Factory hard reset iphone 5 5S 5C SE - video
Hard reset iphone 4 - video
Help! This doesn't work
Hard Reset will erase all of your data
All described operations you are doing at your own risk.