Shopping for a smartphone that runs on AT&T's network? These models should be at the top of your list.
Apple iPhone 4
Apple Corp.
AT&T is no longer the exclusive carrier of the iPhone, but the iPhone remains AT&T's crown jewel. With its solid design, incredible ease of use, and all those apps, the iPhone 4 tops AT&T's lineup.
Motorola Atrix 4G
Motorola
With its dual-core processor and the ability to run desktop-like apps, the Motorola Atrix 4G is almost more PC than it is smartphone. Add in support for AT&T's speedy HSPA+ network, and you see why this phone earns a spot on this list.
Samsung Infuse 4G
AT&T
The Samsung Infuse 4G sports one of the biggest displays yet on a smartphone, measuring a whopping 4.5 inches diagonally. It also features a super-slim profile, version 2.2 of the Android OS, and support for sideloading of apps. And that's not all: the Infuse 4G is AT&T's first HSPDA Category 14 phone, which means it can deliver faster data speeds than the carrier's other 4G phones.
HTC Inspire 4G
HTC
You don't have to shell out big bucks to get a top-notch cell phone. The HTC Inspire 4G is available for less than $100 on contract, yet still offers plenty of features. You get the Android OS, 4G support, and an 8-megapixel camera, for starters.
Samsung Focus
Microsoft
The Samsung Focus was the first Windows Phone 7 device launched in the U.S., and while phones running Microsoft's software don't get a lot of attention, this one is worth a look. It features a 1-GHz processor, a 5-megapixel camera, and 4.3-inch touch screen.