I cannot receive sms messages on iPhone 13, and whenever i try and send a message it says failed to send. I have two phone numbers linked to this phone somehow, I have my previous phone number i chose to keep and another number. I’ve recently just hot back off of holiday and now i am not receiving messages or able to use FaceTime as it says i need to activate something but then says it is unsuccessful, even though it worked fine before. Any help would be appreciated, thank you.