Living up in north Jersey I am getting great 3G download/upload speeds in most areas. Usually around 3 to 4Mbps down/1.5 up using Speedtest.Net app as a guide. I KNOW the accuracy of these apps aren't great but as a relative comparison they give a good idea. I took a trip down the NJ Turnpike Monday from exit 11 down to exit 3. Since my wife was driving for a change I took the time to play with my iPhone (4) and see how well the data which I am paying $30/month for worked. I was pretty disappointed. Once I hit just south of Exit 10 my download speeds dropped like a rock. I was getting constant results of 0.19, 0.23, 0.68, 0.55Mbps down with a VERY rare reading over 1.0Mbps. UPLOAD speeds were always ABOVE 1.0Mbps, just download was so poor. These were all taken along a major North/South route through the state (Route 95 / NJ Turnpike) and not off the beaten path through small towns. I had mostly "full bars" during all these tests and with exception of 1 stretch of a few miles there was always a 3G signal. I found the whole "data speed" experience quite disappointing especially since these tests weren't taken in the boonies but on a major NJ highway.