Anyone willing to explain this data connection thing to me?

[kcrlshell]

Hi all,

I've have a Sprint TP2 and love it. But one thing drives me crazy and I still haven't found an answer after nearly a year with the phone. I turn on WiFi, turn off data connection...within a few minutes data turns itself back on. I have turned off every automatic connection update thing I can find in every app on the phone.

3 questions:
1) Why does it keep turning back on?
2) Can I be sure the phone is using WiFi rather than Data if I just leave the data connection active in addition to having WiFi on?
3) Is there any .cab that will make the Data connection stay turned off until I manually choose to turn it back on?

Thanks!