iMessage and FaceTime Number

Hello ivelina76.

Thanks for reaching out to Apple Support Communities. We understand that you are having some trouble with activating iMessage and FaceTime. We will be glad to assist.

Please see the following resource: If you get an error when trying to activate iMessage or FaceTime

Cheers.

You need to change/add the number on your Apple ID. After the change, allow up to 24 hours for the change to sync. Before trying to make the change, sign out of Messages/FaceTime on all devices/computers.

Apple ID - Manage