If you've already tried holding the home button (only) while you plug the iPhone into your computer and it doesn't work, then you need to put your phone into DFU mode using one of the following methods. Method 1 works in most cases, but there are a couple of exceptional circumstances where methods 2 or 3 are necessary:
Method 1)
- Attach the phone to the pc
- Turn the phone off
- Hold power and home together for *exactly* 10 seconds
- Release power but keep holding home until the computer beeps as a USB device is recognized.
- At no point should the display come on. Now your restore should work.
Having problems? Try adjusting the 10 seconds to be slightly less like 9 seconds, then 8, then 7. It’s a tricky timing but you will eventually get it.
Method 2)
- Hook up the phone powered on to the computer with the phone on
- Now hold home / power until the phone turns off and keep holding for 10 seconds. If the phone ever turns on during this phase,start over and hold for less time.
- Now release power and continue holding home until the computer recognizes the phone.
Method 3)
- Attach the phone to the pc
- Turn the phone off
- Press and hold power. Keep holding power. As soon as you see display on the screen of any sort press and hold home.
- Hold power and home together for *exactly* 10 seconds
- Release power but keep holding home until the pc beeps as a USB device is recognized.
- At no point will the display come on. Now your restore should work.
Max.
