If I leave my Treo600 on overnight it "looses" it's connection with the cingular network until I either use it the next morning or turn on/off. It still shows connected with signal strength, but if someone calls, text, etc it doesn't come through.

Anyone experience this? Any suggestions?

Of course Cingular's brilliant advice was just turn the phone off/on every morning. But if you forget you don't get any of your calls until you remember.

Phone was previously on ATT & I unlocked and brought to cingular. Updated firmware to cingular 3.05.