No voicemail in mailbox--mailbox is empty. Get visual indication, transcript of vm and recorded after press play
Was working fine, problem started about 3 weeks ago. Latest ios, no carrier updates, wifi is ok & cellular data turned on. If you press 1 or dial your cell # same result---mailbox is empty!
This sounds like a Boston Technologies problem (maker of voicemail). Could be due to software upgrade.
iPhone 7, iOS 15