not sure what is going on, but whenever my wife and I exchange texts it defers to the "blue text bubble" and I believe gets delivered via iMessage. Not until I check later that I see the "not delivered" message. What is going on? At this point, I would rather have iMessage turned off and just use the unlimited text plan I have through ATT. I have googled it, but don't think a factory reset or changing of my DNS should be necessary on my part to fix a problem that I never asked for. Anyone else having this issue? Is there an "easyish" solution or workaround? Beginning to wonder how many texts have not gone out that I have been sending. Frustrated.