Can't restore iPhone iOS 4.2.1 ! Help please !

Discussion in 'iPhone Tips, Help and Troubleshooting' started by sPwism, Jan 17, 2011.

  1. sPwism macrumors newbie

    Jan 17, 2011
    I recently purchase my iPhone4 and jailbreaked it with RedSnow.

    It appears that my camera flash light is faulty now as it wont turn on when i use my camera or any flashlight apps. I believe it's a software fault as i did not drop my phone and have been very gentle with it.
    I have tried to reset the settings but the flash light still does not work.
    I need to restore my phone back to factory state so that i can send it back for a warranty exchange.

    However when i tried to restore with the iTunes, after verification with apple,error code " Your iPhone could not be restored, this device isn't eligible for the requested build 4.2.1 "

    Would appreciate if i receive help and tips on this issue.
    Thanks !
  2. yayitsezekiel macrumors 6502a


    Aug 1, 2008
    Irvine, CA
    have you tried putting your iPhone in DFU mode before restoring?
  3. sPwism thread starter macrumors newbie

    Jan 17, 2011
    Oh, DFU mode ? how do i put my iPhone into DFU mode ?
  4. sPwism thread starter macrumors newbie

    Jan 17, 2011
    Oh ok i managed to get it into DFU mode and it worked ! thanks !
  5. NathanA macrumors 6502a

    Feb 9, 2008
    Interesting...the other thread I responded to in this forum had the same issue, also with an iPhone 4. I wonder if Apple's update servers are just being wonky...

    -- Nathan

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