Text messages are not going through for me either. I am very frustrated as I have called Tech support 3x and walked through step by step what they suggested which I knew would suggest that I had already done on my own.
I will get or receive I Message through my MAC or on my iPhone if IMESSAGE is turned on.
I get sporadic messages from other non-iphone users but I NO ONE receives my messages unless it is an IPHONE and i have IMESSAGES turned ON on my phone!
This is a HUGE issue as this is my lifeline for my business. Spending 2 hours working on it today is frustrating when it is still not working. NO messages to a sprint customer went through.