Who I have the same questioned this topic

I got an iPhone 6+ in June but neglected to set up voicemail. Now I am unable to do so.

1. If I try to set up voicemail by calling *86, I get past the language selection. I am prompted to key in a password. When i key in a password and press # I get the following message: "Service is temporarily not available."

2. If I try to set up voicemail via the iPhone's phone app I get past entering and re-entering my voicemail password, then get a dialog which says "Voicemail Unavailable. Could not authorize access."

3. I have tried this with WiFi on and off.

Thanks in advance for your help.

J