Thanks for this. Happy to see this thread wherever is most appropriate.
I posted this for a simple reason. When my texts weren't going through, I checked various posts on the Internet and found no complete answer. Everyone talking about this problem just seemed mystified. After a lot of runaround, I finally got the answer. My primary goal is for others to be aware of the issue, so they don't have to waste the time I did or rely on their text messages going through. My secondary goal is that the carrier resolves the problem or is more forthright about it with customers.
If there is a better place for this thread, in that context, I'm happy to see it there.