Hi folks, n00b here. This has not only happened with my iPhone 4, but with my 3G too. IP4 - It's done this about 4 - 5 times since launch. Randomly, my phone won't send or recieve texts (Freezes on sending, then fails minutes later) Switching airplane mode on and off was a temp fix.. But last night I had to switch 3G off for it to work. IP3G - It happened a lot more, and I had to turn 3G off for a while to fix it. Any idea what it could be? It can't be my sim card, because i switched to a new microSIM. Thanks in advance - B.