how to change voicemail thru at
How to provide at&t with the extra info they need to set up your voicemail box on iPhone 6s
How to provide at&t with the extra info they need to set up your voicemail box on iPhone 6s
What "extra info" do they say is required?
Set up Visual Voicemail on your iPhone - Apple Support may offer you some guidance, but AT&T should be able to help you.
They do not need any extra information. They have set up the iPhone and they just need to set it up as an iPhone mailbox.
how to change voicemail thru at