New iPhone SE Visual Voicemail Not Available

I purchased a new iPhone SE as a replacement on my existing line. When I went to the Voicemail tab in my phone app, there was no "Set Up Now" option. The only option on the page is "Call Voicemail". I did make the call to Voicemail and selected my Pin. I rebooted my phone and still only had the Call Voicemail option. I tried turning Cellular Data on and off and rebooting, no help. I put it in Airplane mode for a minute or two then rebooted, no help.

My mother has had a few iPhones on XM for the last couple of years and ran into this problem on more than one occasion. Enough that I had bookmarked the very long and very helpful thread that used to be on this forum. I tried going to that thread via my bookmark, but it has mysteriously disappeared. If anyone can point me in the right direction to help solve this I would appreciate it. Thanks.