Hello,
I got an iPhone 17 (new number) from an iPhone 8 (old number). I want to keep my old number so I completed the PAC switchover. I have been using iMessage fine for a few weeks until the weekend with my old number. From Monday, my number has switched back to my new number. I am still able to receive calls and texts on my old number but I can only send iMessages from my email or new number. I can’t change on the ‘my number’ setting. I have tried turning I message on and off but nothing changes. When I first noticed it, my old number was selected on the send and receive section but now it is gone completely and I can’t get it back. How do I fix this please? I want to use my old number for all messaging