743      人物

iPad restore error 3503

Hi support,

I want to restore an iPad Air 1 to iOS 11 because the ipad is stuck on the recovery screen.

But when i use itunes to restore the iOS i receive the 3503 error. (Unknown Error 3503).

How to solve this problem?

Kind regards,

Leon

最後更新：2017-09-25 18:44:30

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