Thank you Don for the post and the PM. I have the AT&T Visual Voice Mail application, and that works for me, just not the efficiency I would like. I would like to get the integrated visual voice mail built into Android 6 to work with AT&T. This is the fourth (missing) icon in the phone dialer. It would be favorites, history, contacts then visual voicemail. I only have the three icons (favorites, history and contacts). But some on T-Mobile have the integrated VVM.
In searching, I found a post on Engadget from July 16, 2015 discussing it, and mentioning only two carriers currently supported the new feature. Title of the article is "Google will finally add iPhone-like visual voicemail to Android"
If this site is like Windowscentral I don't think I can post a link until I have more posts here under my belt. Interestingly enough, even though the sign on is the same, it doesn't count posts between these two sites together.
Thank you again for your post. I am hoping for the integrated solution.