Spoke to a helpful chap on the phone at O2, to get i-data activated for visual voicemail to functiopn and he gave me instrictions for my end which starts with dialing 1760 to deactivate voicemail.
Dialled 1760 and the final message I got was "Your messaging service could not be switched off - please call Customer Service".
I thought, okay, maybe its already switched off so I tried to call 1750 to turn it on first. The message I got was "Your messaging service could not be set up because we have not received your number".
So I thought I would check if my number was set up in the iPhone 11 (with e-SIM). I went to Settings - Phone - My Number- E-Sim and found the number is blank. I tried entering it in Uk format and international format (+44 .....) and no matter what I type, pressing save, does not result in the number being saved.
Unless I can get the VM switched off I cannot follow the rest of the instructions. I have checked and VM is still active although I get no notifications of any kind for messages left.
Thoughts ?
