I'm trying to transfer text messages from my (old) AT&T Samsung Galaxy S6 to my (new) Verizon Samsung Galaxy S7. I can get the SMS and MMS messages to transfer, but any messages in the "Advanced" format (which I assume is the same as Rich Communication Service or RCS format) do not transfer over, or, at least, I cannot see them in my messaging app on the new phone. I've tried Verizon's transfer app, Samsung's, Google's, as well as SMS Backup+. None of them seem to do the job. I've also tried looking at the texts with the stock Samsung "Messages" app, the new "Android Messages", and Verizon's messaging app. None of them can see the RCS messages, which makes me think they're not even transferring over. I can't find any useful info on the web about this problem.