Voicemail set-up
So I was attempting to set up my voicemail on my iPhone. I have never set up a voicemail previously. When I open the voicemail option on the phone app, it says "call voicemail" and when I click it calls with no ringing and then says call failed. I know its not a network problem, any advice on what is going on? As for as I researched I couldn't find anyone else with this same problem.
iPhone 8 Plus