How to Reset iPhone 4S, 4 or 3GS
If your iPhone is not responding and frozen, a reset may help you.
Follow these steps
- Press and hold the Sleep/Wake button on the top of the unit until a red slider appears
- Drag the slider on the screen.
- Press and hold the Sleep/Wake button until the Apple logo appears.
- Press and hold both the Sleep/Wake button and the Home button simultaneously for about ten seconds
- Wait, until the Apple logo appears.
- You have successfully completed a hard reset.