[markgamber]

It happened to me once a couple of days ago after I had been tethering for about 15 minutes. The phone was fairly warm to the touch and suddenly it went into airplane mode. When I brought up the comm manager, that was the indication it gave, also. It didn't look broken, it looked exactly as if I had put it in airplane mode. I flipped it back to normal mode and it picked right up where it left off and didn't do it again. My radio setup is the same but, like you, I'm stumped and I seriously doubt there's any kind of solution to a problem this random. But I have gotten to where I don't trust this phone anymore (for various reasons) and I'm thinking that if it does it again, I'm probably going to toss it and get something more reliable.