Motorola ROKR Z6m

I recently started having this EXACT same problem .. I can send a few texts and then they stop going out after about 4 and just sit in my outbox until I reset the phone. My provider of course is no help, they have no idea what's wrong and have tried all the usual possible "solutions" and nothing works. Then I took out my 2G memory card, left it out and the problem seemed to be gone, I sent and received a dozen or so with no problems at all. I then put the card back in and it still seems to be working fine, so maybe my card was the issue .... if you have one in your rokr try that and see if it works.