I heard today that the iphone 4S is still 3G hardware, which would certainly explain the results I got. Also, our area isn't 4G, at least according to the local phone guy.
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Greg, you must not be reading anything written above. Yes, the iPhone 4S is 3G hardware. It was not slated as 4G. The rare exception of improved performance is on AT&T in select areas supporting HSPA+, but this isn't 4G service.