5 Replies Latest reply: Oct 19, 2010 12:32 AM by chcn
MoneyG Level 1 Level 1 (0 points)
okay well I've tried just about everything to get my iphone 3G to go into DFU mode but it just wont work. It wont even go into recovery mode. Can anyone help me and tell me whats wrong with it and how to fix it? thanks

Windows 7, my current software is 4.0 because I downgraded
  • XanderCDN Level 1 Level 1 (0 points)
    Why do you need to go in DFU mode?

    In most cases, you don't need to do anything on the iPhone to put it in restore mode. You just connect it, and when it appears in iTunes, you click the "Restore" button and the iPhone will automaticly restart in recovery mode.
  • MoneyG Level 1 Level 1 (0 points)
    I need to put it into DFU mode so I can downgrade it again.
  • Dr_AL Level 3 Level 3 (670 points)
    Well unfortunately Apple doesn't support downgrading the iOS firmware, so you might not get much help here. I'd suggest Google, to make sure you are completing the process of DFU mode properly as it can be very difficult to enter.

    What happens when you turn the unit on? Anything? You should at least be able to get the unit into Restore mode and the load the 4.1 onto the 3G.
  • Kurt Tappe1 Level 1 Level 1 (10 points)
    I have the same problem with my new iPhone 4. It absolutely refuses to go into DFU mode no matter what I do. I am wondering if Apple has disabled DFU mode in iOS 4.1.
  • chcn Level 1 Level 1 (45 points)
    I just successfully put my iPhone 4 into DFU mode (at the suggestion of a Genius bar tech). It can be tricky and I think you have to follow these instructions quite closely:

    1) Start iTunes and connect the phone via USB.
    2) Hold down Home button and the Sleep/Wake button simultaneously.
    3) Keep holding both buttons exactly 10 seconds, then release the Sleep/Wake button while continuing to hold the Home button until the dialog box appears saying "iTunes has detected an iPhone in recovery mode."

    If you've done it right the iPhone screen will be blank, not displaying the normal recovery mode graphics (the plug-me-into-iTunes graphics). On my system a new USB driver was installed too.