Unable to activate, An update is required.
Hello.
i have an unlocked iPhone 7. been using it for 2 years. Upon updating it to iOS 12, the following message appears:
When I try to connect it to iTunes, It doesn't appear as it shows another activation error message like the following:
Apple chat couldnt solve it.
Note: the iphone is unlocked. out of warranty, and with valid sim-card trials each with a different sim card.
Any help please? ive done everything.
iPhone 5, iOS 7.1