iphone 4 keeps rebooting after 5.0.1 jailbreak

Discussion in 'Jailbreaks and iOS Hacks' started by phryedrice, Dec 28, 2011.

  1. phryedrice macrumors newbie

    Joined:
    Feb 18, 2011
    #1
    is anyone else having this problem? when i try to restore, i get an itunes error saying "Iphone could not be restored. An unknown error has occurred (21)."

    please help
     
  2. electron73 macrumors newbie

    Joined:
    Dec 28, 2011
    #2
    Had the same thing today, found out was a result of previous jailbreak and stuff. Go into DFU mode (google for procedure) and then do a "shift-restore" from within iTunes to a fresh 5.0.1 and voila! It should work like a charm (it did here!)
     
  3. nwlondonlad macrumors 6502a

    nwlondonlad

    Joined:
    Sep 20, 2007
    Location:
    UK London
    #3
    I had this problem last night for hrs. I was using a pc. The only thing that worked for me was doing the restore on my Mac.
     
  4. phryedrice thread starter macrumors newbie

    Joined:
    Feb 18, 2011
    #4
    ya i had to use my brother's mac. did you also jailbreak your phone on the mac too?
     

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