I just got the 3GS today and took off the 3G data plan. I later added the Mobile Web Unlimited $15 data package. I'm not sure if it used to be called Media Net Unlimited but I had Media Net Unlimited working on my Iphone 2G in the past. I tried using Mobile Web Unlimited package on my Iphone 3GS and the 2G and I cannot get it working. However, I tried using that sim in an old Nokia and got Media Net data working. I tried loading both Iphones w/ the old IPCC files but that did not fix the lack of data. Please let me know if anyone got this working and how you got it working. Thanks in advance!