Wrong itunes account when updating apps
Essentially this means the i Phone or i Pad will be bricked and unusable until it can be restored or successfully updated with i Tunes and a computer.Update: Apple has apparently fixed the problem with the OTA update.Some users who restore the effected i Phone or i Pad through i Tunes discover the device is being downgraded to i OS 9.3.5, rather than updating to i OS 10.If this happens, it may be a good idea to stay on i OS 9.3.5 for a while until the trouble with the i OS 10 update is resolved, or use i Tunes to install the i OS 10 update instead of the on-device OTA mechanism.Or if the payment method has expired, you can choose “None” too and bypass the ‘Verification Required’ message that way as well, and then later go back and update the payment details if need be.
There are also mixed reports of resolving i Tunes error 1671 by restarting the i Phone or i Pad and the Mac or PC.
i OS 10 update totally failed and now you can’t use an i Phone or i Pad at all?
This is pretty rare, but if it happens you may need to try a Recovery Mode Restore.
You can check what the outstanding bill or App Store purchase is that has an outstanding balance by doing the following: If the outstanding purchase is not something you are interested in, you can also attempt to contact Apple for a refund on that balance due.
Regardless of whether you pay the balance with updated payment information, or have it canceled, you must clear the due balance on the Apple ID to be able to fix the “Verification Required” message on the App Store for i Phone or i Pad and then you can select the ‘none’ payment option.