To restore iPhone to its previous state we need to put it under Recovery Mode. But under some circumstances , Recovery Mode wont just work. In that case you need to put your phone in DFU mode .
How to enter DFU Mode ?
- Enter iTunes and connect your iPhone via USB.
- Hold down the Home key and Sleep – Wake button at the same time.
- Keep holding both the buttons for exactly 10 secs. Then release the Sleep – Wake button. Keep holding the Home key until the dialog box appears saying “iTunes has detected an iPhone in Recovery Mode”.
Note : If you hold the home button too long , your device [iphone ipod touch ipad] will enter Recovery Mode instead of DFU Mode and show the “Connect to iTunes” screen as shown in the image below .
You must now launch TinyUmbrella and click on Exit Recovery [shown in the image below] to get your device out of this recovery state and try the above step again to enter DFU Mode . Watch the video below to follow the exact steps as demonstrated .
How to put your device in DFU Mode – YouTube Video in HD