Data connection is lost when talking. (Spcs Touch Pro)

[olsurf]

Hi,

I recently moved from AT&T Tilt to Sprint Touch Pro. My TP is overall good but has some unique issue with data connection. On tilt, I could surf browser simultaneously when I used to talk (so phone line and data connection were independent). But it is not the same on TP. I don't know why but whenever my call is on, the data connection seems to be lost and I can not use Google maps/browser etc. I have been looking on PPCgeeks and XDA for past 2 hours but can not find the solution if it is unique to me or is it common...

In general, phone is standard WM6.1 with advanced Config 3 installed and some other general applications. Can you please help?