While I'm having a conversation on the phone for about 30 min, I'll be able to receive text messages from others but I am not able to send messages back. Is there something wrong with my phone?
I had that same problem with my Verizon 8830. I could send and receive SMS for the first 15 minutes or so of a long call, then I would stop receiving or being able to send until several minutes after ending the call. I never figured out why. It's clearly not correct, but it's not just your phone.