I updated my ipad mini4 and it says "There is a problem with this ipad. This ipad cannot be activated for service. Please contact your service provider or Apple care
iPad mini 4, iPadOS 14
iPad mini 4, iPadOS 14
Have you followed those instructions? Apple has provided this information. It may be of help.
If you can't activate your iPhone or iPad (Wi-Fi + Cellular) - Apple Support
Have you followed those instructions? Apple has provided this information. It may be of help.
If you can't activate your iPhone or iPad (Wi-Fi + Cellular) - Apple Support
I updated my ipad mini4 and it says "There is a problem with this ipad. This ipad cannot be activated for service. Please contact your service provider or Apple care