iPhone wont go into DFU mode!

Discussion in 'Jailbreaks and iOS Hacks' started by Brannon, Oct 17, 2010.

  1. Brannon macrumors regular

    Joined:
    Nov 28, 2009
    #1
    Okay! i have and iphone 4 previously jailbroken. I upgraded to 4.1 wanting to jailbreak that. And now it wont go into DFU mode.

    DOnt say it is user error. It is not. I have fallowed everything exactly multiple times. I got into DFU mode erlier and the jailbreak failed and since then no luck at all doing the exact same thing..

    Is there anyway to put it into DFU mode on a mac without having to push buttons or anything?

    Everytime i try and put into DFU mode it jus boots back up. Even when i let go of the power button as soon as it goes black. It will either turn off of or boot back up. It boots back up usually. And i am holding the home button the entire time..

    Thank you for your help!
     
  2. jpetticrew macrumors 6502a

    jpetticrew

    Joined:
    May 13, 2009
    Location:
    Texas
    #2
    I know you said not to say this... But it's probably user error. The iPhone is incredibly picky about timing when entering DFU mode. Make sure you've got the timing exact.
     
  3. eastercat macrumors 68040

    eastercat

    Joined:
    Mar 3, 2008
    Location:
    PDX
    #3
    If it isn't user error, then it might be a problem with the phone itself. Make sure the power button and home buttons are actually working. Take your phone out of the case when doing DFU mode (sometimes, the case interferes).
     
  4. Bakakage macrumors 6502

    Joined:
    Jun 18, 2009
  5. f4780y macrumors 6502

    f4780y

    Joined:
    Jul 21, 2009
    Location:
    Troon, Scotland
    #5
    I hate to say this, but it sounds like user error to me. You are not following the instructions correctly if you are doing what you say above.

    YOU MUST NOT LET GO OF THE POWER BUTTON AS SOON AS THE SCREEN GOES BLACK.
    You will never get into DFU mode this way. I know it is counter intuitive, but you must hold the buttons for approx 2 seconds AFTER the screen goes black, and then let go of the power button. The timing is exactly 10 seconds total, but the phone resets after about 8 seconds...

    Try it again. Hold both buttons and count to 10. When the phone resets keep holiding for about another 2 seconds, then let go of the power only. Keep the home button pressed. You will achieve DFU mode a few seconds later.

    I used to think exactly the same way. When it resets, then surely it wont work, but it does. Keep the faith.
     
  6. fuzion11 macrumors 65816

    fuzion11

    Joined:
    Sep 24, 2008
    Location:
    Hamilton, Ontario
    #7
    If I were you.....you could download greenpois0n and use that tool to put you perfectly into DFU mode...it has the proper timers and all that.

    Once into DFU mode, just close GP and open iTunes back up.
     
  7. -aggie- macrumors P6

    -aggie-

    Joined:
    Jun 19, 2009
    Location:
    Where bunnies are welcome.
    #8
    Or you could see my sig to make sure you’re doing it right.
     
  8. thelatinist macrumors 603

    thelatinist

    Joined:
    Aug 15, 2009
    Location:
    Connecticut, USA
    #9
    What you described (releasing the power button as soon as the screen turns black) is not the proper way to put an iPhone into DFU mode, so I can only assume that, despite your protestations, you're doing it wrong. The correct method:

    1) Press and hold both power and home for exactly 10 seconds.
    2) Release the power button, but continue to hold down the home button until iTunes recognizes a phone in DFU mode.

    Getting a phone into DFU mode requires precise timing, and for some people it can be very difficult, but if you keep trying with the correct procedure you will eventually get your timing right.
     
  9. Brannon thread starter macrumors regular

    Joined:
    Nov 28, 2009
    #10
    OKAY!

    I have done all these things. Out of the Bumper. Holding exactly 10 seconds. Fallowing the instructions with GreenPoison and with LimeRa1n.

    What i meant by letting it go right after it went black was that is something i have tried but i know that that is not tghe proper way toj do it. It was jus something i saw on another forum that got suggested and supposedly worked.

    I have held down for about two seconds right after it goes black also. It jus will not work for me for some reason.

    I have tried plugged into the latest iTunes on both Mac and PC.

    I will keep trieing as there seems to be no other option. I already miss my jailbreak;[.

    Is there a way to do it on a MAc or PC without having to press the buttons?

    I know limeRa1n puts it into Recover Mode is there something thatn will put it into DFU mode?

    Thanks!

    Again....
     
  10. thelatinist macrumors 603

    thelatinist

    Joined:
    Aug 15, 2009
    Location:
    Connecticut, USA
    #11
    DFU mode is designed to be invoked by hardware; that's how it is isolated from the phone's software to ensure that it can always be used as a final, failsafe restore option. That's why we say that it is impossible to "brick" an iPhone through any software, because there is always a way to get your phone into DFU mode.

    And, no, there is no method of putting an iPhone into DFU mode using software. I understand that there was an unreliable method for invoking DFU mode through software on the original iPhone on OS 1.x, but that was a long time ago, back when it was actually possible to brick an iPhone.
     
  11. spamdumpster macrumors 6502a

    Joined:
    Jan 22, 2008
    #12
    The link I posted about 5 posts up allows you to put an iPhone in DFU mode without using the home button. Check it out. It was tweeted by musclenerd this morning.
     
  12. TMar macrumors 68000

    TMar

    Joined:
    Jul 20, 2008
    Location:
    Ky
    #13
    Yeah, that's easier then holding buttons. All it does is break the boot chain but it is interesting that breaking it at the LLB will cause it to go into DFU.

    Edit: After rereading it the author got a couple of points wrong. It doesn't invalidate iboot because it ever gets to that point. The bootrom validates the LLB then the LLB validates iboot before iboot validates the iOS kernel.
     
  13. thelatinist macrumors 603

    thelatinist

    Joined:
    Aug 15, 2009
    Location:
    Connecticut, USA
    #14
    Hmm. Very interesting. This isn't really invoking DFU Mode, though; it's just deliberately breaking the low-level bootloader (LLB) so that your phone must go into DFU mode by default. Clever, but really not the best way of going about it, since it will be impossible to get out of DFU mode (and there are several reasons one might want to enter into DFU mode while not wishing to completely restore their phone).

    And of course this method will only work if you are able to restore via iTunes.

    Really? It's never taken me more than a couple of tries to get into DFU mode.
     
  14. TMar macrumors 68000

    TMar

    Joined:
    Jul 20, 2008
    Location:
    Ky
    #15
    Come on now did I really need to put the sarcasm tags in there?
     
  15. thelatinist macrumors 603

    thelatinist

    Joined:
    Aug 15, 2009
    Location:
    Connecticut, USA
    #16
    Sorry. On the Internet your sarcastic voice sounds a lot like your regular voice.
     
  16. Night Spring macrumors G5

    Night Spring

    Joined:
    Jul 17, 2008
    #17
    If you do it on a PC, you can use the "pings" of USB device connect/disconnect to guide you. Connect your phone to PC (ping). Press and hold both power and home until you hear the disconnect ping. Release power while keeping home down and hold it until you hear the connect ping. At this point, you should also get a message saying something like "new device found, installing driver."
     
  17. Brannon thread starter macrumors regular

    Joined:
    Nov 28, 2009
    #18
    I got it.

    Randomly tried it and it worked.

    I didnt even count. I jus waited till it went back and jus let off when i felt it was time...

    Kinda feel stupid now....

    Thank all of yall for all your suggestions!!!
     
  18. TMar macrumors 68000

    TMar

    Joined:
    Jul 20, 2008
    Location:
    Ky
    #19
    Problems getting into DFU are always user error. Most find it hard at first but once you've done it a couple of times it becomes easy.
     

Share This Page