iPhone 6s 'Activation Required' issue
I just switched to an iPhone 6s over the weekend. It went alright, no issues with making calls, receiving texts, wifi, mobile data, etc. until I returned to the office yesterday where mobile signal is none. wifi is still working, but the phone keeps showing 'Activation Required' message, and when I pop in the details the message goes away then another message about iCloud t&c's, so I agree to the t&c's and it goes away. After a while, it comes back again and I go through the cycle again. When the mobile signal returns all is well. Contacted Apple care today I was suggested to turn off vpn and Activation Lock for a bit but no faults were found otherwise.
Anyone has any idea?
iPhone 6s, iOS 12