[lmv7777]

the easiest way is to setup a disconnection timeout period. search around here for a program called diamond tweak and change the connection timeout setting. there is also a tweak to place a "disconnect" button on the data bubble. both those are good solutions to the problem. you may have also installed a program or activated something that keeps the data connection alive (like a weather program that uses up to date information, an RSS program, stocks.... etc.) this may be why it does not completely disconnect.