Iphone 4 stuck in recovery mode

Discussion in 'iOS 5 and earlier' started by itsmeott, Oct 26, 2011.

  1. itsmeott macrumors newbie

    Oct 26, 2011
    Hope some one can help me. I have an Iphone 4 that I updated to IOS5 it worked fine for a couple days then it seemed to crash. Now I am stuck in recovery mode loop, when trying to resore on itunes I get error 21. I took it to att they tried to fix it for me to no avail, at a loss as what to do. it is not jailbroken and it is also older than 1yr so no warranty.
    lost with out my phone
  2. Kyotoma macrumors 68000


    Nov 11, 2010
    Carnegie and Ontario
    Try using TinyUmbrella to kick it out of recovery.
  3. TomH TX macrumors regular

    Oct 18, 2010
    According to an Apple support document I found, but which did NOT link correctly, error 21 arises from security software. Disable the anti-virus on your computer, and try again.

    "Error 20, 21, 34, 37: These errors typically occur when security software interferes with the restore and update process."

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