Disabling GPRS on T-Mobile?

I just had a quick question.

My GPRS was disabled on my V600 (Unlocked) when I was with Cingular. I recently switched to T-Mobile and I have the GPRS logo appear next to the bars. I called CustomerCare but they hardly know much Is it possible for the guys at the T-Mobile store to turn it off for me?

---

› See More: Disabling GPRS on T-Mobile?

If you have not subscribed to the T-Zones feature with T-Mobile using GPRS will ask you to subscribe. If you gon't subscribe.. the GPRS features shouldnt work.. or cost you anything.
to my understanding you can still get ringtones that are purchased via your computer adn mytmobile.com.

But how does this work if I never had any connection on Cingular (and mMode turned off as well back when I bought it with ATT Wireless settings (and locked) and the GPRS icon was definately off. And yes, I am definately not subscribed to T-Zones

Cant seem to crack it.