Itunes
I have a iPad mini 4 A1550 Says it needs to be updated ..but I run it in iTunes and comes up iTunes could not connect to this iPad due to unknown error
iPad mini 4 Wi-Fi, Cellular
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See If you can't update or restore your iPhone, iPad, or iPod touch - Apple Support. If you're trying to update using iTunes try over the air instead, or vice versa.
Note if you're getting a -4000 error when updating from iTunes for Windows you need to remove your device passcode, update, then enable again afterwards.
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