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iTunes error code 3503

Hi,

 

I tried to upgrade my iPad to iOS 11 using iTunes since my iPad could not connect to wifi but all of sudden, the operating system broke during upgrade, caused iTunes logo to appear on screen on boot. I restart my PC, reconnect iPad and restore to iOS 11 but it failed with an unknown error code 3503. I entered DFU mode and restore again but it also failed with an unknown error code 3503. Tried other computers to restore with different network, still same error.

 

Apple and the internet does not give me infomation about error code 3503. An user said "Find my iPad" must be turned off but i can't access the system.

 

How do I do now?

See this thread post.

Appears to be a common problem at the moment.

 

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

最後更新：2017-09-25 17:32:21

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