If your phone says something like "G" or "E" next to the bars, you have some data. If you download a basic "ping" utility and run "ping 8.8.8.8" it will tell you just how slow it is. The problem is that today's smart phone apps (e.g. Pandora, YouTube) use exponentially more data than those of a few of years ago. 2g data was fast enough a few years ago but is totally saturated now by just a couple of active smart phones.
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