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itunes 3503 error help

update ipad mini2 ios10.3.2 -ios 11 

happend error 3503 

no answer in google youtube

my iphone7 successfully updated ios11 using itunes11 4days ago 

help

This appears to be an issue currently.

See this thread post here.

https://discussions.apple.com/thread/7768437

最後更新：2017-09-25 17:32:24

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