The 3D smartphone battle is just beginning to heat up in the United States. Sprint was the first to market with the HTC EVO 3D, but the LG Optimus 3D (coming to the States as AT&T's LG Thrill 4G) isn't far behind. The EVO 3D sports a 1.2 GHz dual-core Snapdragon CPU, 4.3-inch qHD display, dual 5-megapixel cameras, a front-facing shooter, and Android 2.3 with HTC Sense 3.0. The Optimus 3D, on the other hand, offers a 1 GHz dual-core TI OMAP CPU, 4.3-inch display, dual 5-megapixel cameras, and Android 2.2 with LG's custom UI.

They're both jam packed with features and ready for the power user, but it's a dogfight, so only one can win. Which phone will leave the ring as the champion? Part 1 of 2.