I brought my iphone 8 plus to a local store to set it up for my teenage son. It is all working EXCEPT for the voicemail. When we attempted to set it up, it says the account cannot be found. When anyone calls the phone and waits for voicemail, it just says “the number is not a subscriber.”
We have tried everything. Resetting call forwarding. Turning of wifi calling. Resetting the passcode online. Setting up the voicemail remotely. Setting up the voicemail on the phone. Installing a new SIM card. Nothing works.