Samsung Nexus S
OS: Android 4.1.1
From its shiny plastic case to its 4-inch curved 800-by-480 pixel LED, Samsung's Nexus S is simply a great-looking smartphone. Underneath is Samsung's 1-GHz ARM Cortex A8 "Hummingbird" processor running pure Android. At 4.75 by 2.5 inches by about a quarter-inch thick, the Nexus S feels comfortable. It's a two-camera unit, and its 5MP rear auto-focus camera takes superb pictures, including macro close-ups, and captures 720p video.
Getting files onto and off of the Nexus S is a snap, thanks to a built-in USB storage app that opens the root directory to its microUSB port. Simply attach the included cable to a computer's USB port, and drag and drop files to and from the device's 16 GB of user-accessible memory. Other convenience features include a dual-purpose power button, which also brings up a menu for quickly controlling sound, airplane mode and to quit all apps and shut down.