My (backup) iPhone says, "<XXX> 18 days left. This number is registered to your Apple ID, but is not associated with this phone. You can keep using the number for iMessage and FaceTime until it expires."
The thing is, XXX is the number on this phone. Can anyone explain what I am to make of this inexplicable error message?
I'm wondering if I should remove it and try setting up iMessage again but that might make things worse.
@robpike I know that "own phone number" was an afterthought in the whole system. At least on non-iphones it is very common for a phone to not know the number of the inserted SIM card, because it's not stored/not stored correctly. (Usually this is no problem since the phone doesn't need it to work.)
It might be related to that?
Some operators have a short code that you can send/text in order for them to actively push the correct configuration (again) to fix this.
@robpike I know that "own phone number" was an afterthought in the whole system. At least on non-iphones it is very common for a phone to not know the number of the inserted SIM card, because it's not stored/not stored correctly. (Usually this is no problem since the phone doesn't need it to work.)
It might be related to that?