No voicemail notification on iPhone 7
I have tried to set up visual voicemail on multiple iPhone 7's on my prepaid AT&T account with no luck. My wife and I both have the same AT&T prepaid account and visual voicemail works fine on her iPhone SE but not my iPhone 7. It's not just that visual voicemail is not working, I also do not get any notifications at all when someone leaves a voicemail on my phone #. Since registering with AT&T I have used two iPhone 7s, including a brand new replacement from Apple.
I have taken my phones to several AT&T retail stores and they claim it's an Apple software problem. I took the phone to Apple and they claim it's an AT&T network problem. It's very frustrating that the only way to check my voicemail is by calling my own phone #, typing in the password and bypassing the greeting to see if there are any audio voicemails.
Does anyone have any ideas on how to activate voicemail?