Quick help on T-mobile 3G iPhone setting

[laststanding]

i am able to receive dial calls and text mesages on my 3G iphone with T-mobile sim.

what do i need to have internet working on my iPhone ( I have smartphone internet plan on t-mobile).

I went to general network, APN:wap.voicestream.com.... It's still not working.

[shutter13]

I found these settings using google, oddly enough it was from a thread on this site.

wap.voicestream.com (if you have limited plan)
internet2.voicestream.com (if you have $19.99 plan)