My wife has a 300, and I've had both a 270 and a 600. I was always able to SMS her, and she'd get the ID.

Since I went to the 650, every SMS is "Unknown Caller ID" -- but other people sending her texts (none with a 650, though) are still working, so this has got to be a 650 thing....doesn't it?

Any help would be appreciated.

Steve