iPhone disabled - Connect itunes - No luck

[Khizer Hayat2]

Hi there,

I just updated my iPhone 6S to iOS 11 on 20th September 2017, due to heating issues I reset all the settings. So after that I set the passcode again but unluckily my iphone didn't recognized that and after a few attempts it is disabled now.

I tried to connect to itunes and it is not recognizing my device. The I started that in recovery mode to restore, itunes said you need to download ios software which it did, but after extracting software it doesn't work with error 3503.

I am backing up my device to itunes and now I cannot erase it from icloud as it says device is offline.

Please help me in this regard.

Thank you

 

[pkcable]

Reading this support post I'm thinking you MIGHT need to turn off "find my iPhone"

https://discussions.apple.com/thread/7768437?start=0&tstart=0

WORSTCASE if you can't manage to resolve this yourself you may need Apple's help, you can get them here.....

https://support.apple.com/en-us/HT201232

(Note: There ARE numbers for many countries so in case you are not in North America you should still be able to call)