iMessage won't forget number
I just can not get my iMessage to forget my previous phone number.
Though I think I have tried everything available....
For some reason, even after changing my trusted phone number in appleid and changing the password for three times the old number - to which I don't have access anymore, still shows up in iMessage.
I have tried following the steps in the Add or remove your phone number in Messages or FaceTime - Apple Support document more than once too, to no avail.
If I turn iMessage off and back on (even after a while or a couple of restarts), it will say "Activation unsuccessful." after a while. It will still log into my Apple ID in "Send and Receive" but show my old number.
The number shown is my previous number. But I have since removed that number from my personal contact on my Mac as well as on my iPhone:
My trusted phone number on the iPhone is updated to the new number too:
And finally my numbers are updated in appleid.apple.com:
I also tried to deregister through Deregister and Turn Off iMessage - Apple Support but I don't get a message. (Probably because I don't have access to that number anymore.) Then again, I just want to register a NEW / DIFFERENT number that is already registered everywhere with Apple...
Any other hints what I can do?