Had a strange problem develop there, tried to send a text. Sending failed, no worries, it happens, send again... Then the phone constantly and almost immediately gave me the sending failed notification. I had near full signal at the time. The only way to stop the cycle was to turn the phone off, since then I can't connect to O2. Phone reports Ltd. service (none). Anyone else experience this? I also have an iphone beside me with a sim card in it which has full signal so it's not the network. The phone also keeps displaying missed call notifications from yday which I keep clearing. Is it broken?! Edit: Now the phone keeps restarting itself :-( Edit 2: Apparently the whole O2 network crashed... straining under the pressure of serving all the new HTC Desires out there.