Error 21 on iph4

Discussion in 'iPhone 4' started by Tristan, Jun 28, 2013.

  1. Tristan

    Tristan Active Member

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    Does any one know what error21 is, and what I need to do to fix it?
     
  2. willerz2

    willerz2 Super Moderator Staff Member

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    Error 21 often times is an IPSW and/or DFU issue, particularly if you're attempting to restore to a custom IPSW.
     

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