My partner and I both have $5.99 tzones on our 2G iphones - worked great for well over a year. We switched to the 'epc' proxy. Worked great over the fall - I stupidly did not look at my Tmobile bills until now and now notice that, beginning in early Dec, they started charging us data charges!!! - my Dec bill was $270 and my Jan bill is already at $180.... needless to say I've turned off data roaming...

[Update: sorry, I just found out why I got charged. As it turns out, the epc. proxy still works for use in the U.S. Until December, it was a little known fact that the proxy tzones hack ALSO works for free data roaming in Canada - used it for over a year all over Canada (Halifax, Toronto, Montreal, Calgary, Winnipeg). Guess they caught on and they started dinging for data usage almost 2 months ago. Serves me right I guess for not keeping a closer eye on my bill]

oph ok had me a lil scared there