Registered phone number not associated with device
My number is registered to my appleId but my is not associated with this iPhone
this happened when I changed network provider but kept the same phone and used a PAC code to change the number of the new Sim to my previous number.
I have since then been getting warnings that I will not be able to do iMessages and FaceTime in 7 days time as this will expire. What can I do?
iPhone XS, iOS 15