The Fastest Smartphone on (AT&T)

LG Optimus G

The LG Optimus G has all the makings of a killer smartphone. From its 4.7-inch 720p display to its quad-core processor, this is definitely the fastest smartphone on AT&T, and one of the nicest looking, too. Its 1.5GHz Qualcomm Snapdragon S4 Pro processor turned in the fastest benchmarks we've ever seen on an Android phone—even faster than the model we tested on Sprint. And 4G LTE speeds on AT&T were positively smoking. Unfortunately, all that speed makes for some overheating issues, and camera performance is average at best. The Optimus G is a beast of a phone, but it isn't perfect.

Design, Call Quality, and Network
The Optimus G on AT&T looks a lot like it does on Sprint, which is a good thing. LG created the gorgeous Prada phone, so it's no surprise that the Optimus G is quite a looker. Made of high-quality plastic on the sides, with glass panels on the front and back, the phone has a vaguely incandescent pattern on the back that looks different depending on the angle you view it from. I miss the silver accent ring wrapped around the middle of the Sprint version, but the phone still pulls off simple-chic very well.

That 4.7-inch HD IPS Plus LCD is pretty awesome. It features 1280-by-720-pixel resolution, which works out to a crisp 312 pixels per inch.

This phone doesn't use a PenTile pixel layout, so it looks even sharper. That big screen is ideal for watching video, playing games, and taking photos. It also means you get a sprawling keyboard for typing; I actually had to stretch my entire thumb across the screen in order to hit every letter. It's a little big and unwieldy, but so are all phones with a screen this size.  

Android and Apps
The Optimus G is the first U.S. phone powered by Qualcomm's 1.5GHz quad-core Snapdragon S4 Pro APQ8064 processor and this is the fastest Android phone we've tested—even faster than the Sprint version. 
The Optimus G ships with Android 4.0.4 "Ice Cream Sandwich," which LG pledges to update to Android 4.1 "Jelly Bean" within the coming months. Although Ice Cream Sandwich lacks Google's Project Butter, which smoothes out the Android experience, the quad-core processor still makes everything feel fast.