I'd try the CNET Cell Phone forum but for me I had to turn off the phone to force this one if the phone didn't obey my settings. Again, I would head to the control that enables/disables the wifi/phone/bluetooth and turn off just the phone.
I have a HTC Touch Diamond 2 model # T5353. When I surf the web with my HTC with Wi-Fi I get the notification that T-Mobile data is connected. How can I get the phone to stop auto connecting me to a cell phone data connection? Thanks Frank