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  1. Thread AuthorThread Author   #1  
    iMore Question
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    Default Iphone boot loop problem

    Currently my iphone 4s went into Boot Loop! I have tried almost all the given techniques given on YouTube but nothing has helped me fix my problem! I tried updating and restoring the phone via Itunes but it shows error(21) and doesn't help! Can anyone provide some help?
  2. #2  
    Fit24's Avatar
    iMore Expert

    835 Posts

    Default Re: Iphone boot loop problem

    I recommend taking it to an Apple Store if you have one nearby.

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