While recently i hospital the ID signal proved inadaquate. I borrowed a GiffGaff sim card and fitted it into my iPhone X. Now out of hospital I’ve gone back to the ID sim. It all orks except that incoming voice calers get a message saying that my call can’t be taken and inviting that they leave a message on the GiffGaff vms system.
I‘ve reset ‘network settings and I’ve turned the phone off and on but these actions achieved nothing.
Any ideas please?