19. Samsung Nexus S 4G

Specs: 1 GHz processor, 16 GB, 4-inch Super AMOLED display, Android 2.3, wi-fi, 5 MP front- and rear-facing cameras
Price: $200
As the newest official Google phone, the Samsung Nexus S 4G delivers the best Android experience out of any smartphone on the market. The Android 2.3 Gingerbread OS is not bogged down by UI add-ons, instead you get a clean install of the OS the way Google intended it to be used. You also get a fast processor, a great screen, and the ability to use the new Google Wallet service thanks to the built-in Near-Field Communication chip--a first among Android phones.