iLounge has completed its initial 3G cellular data speed comparisons of the iPhone 4S across all of the available U.S. carriers. As seen in the graphic above, the data speeds seen on AT&T’s HSPA network—between 2.41Mbps and 2.99Mbps down, 0.68-0.81Mbps in Buffalo, NY —far outpace those seen on either Verizon’s or Sprint’s EV-DO networks in the same area.
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