AT&T was Apple's first love. Thanks to the now-famous five-year exclusivity agreement, AT&T built up a huge population of fans who may now be interested in trading up to the iPhone 5 ($199/16GB, $299/32GB, $399/64GB with contract; $649-$849 without contract). While all the iPhone 5 models work the same in many ways, the carrier does make a difference, so we're testing them individually. AT&T's iPhone 5 offers the same Editors' Choice-winning hardware and software as the Verizon model does, but with a few twists. AT&T allows simultaneous voice and data, which makes the iPhone a much better car GPS when paired with a third-party app like Navigon. Depending on where you live, AT&T's iPhone may offer even faster Web page and game downloads than Verizon's model does. But AT&T's unit isn't unlocked for foreign use, and won't roam on LTE networks outside the U.S. and Canada.