Samsung Nexus S Unlocked Phone–U.S. Warranty (Black) Frequency: GSM Quad-band: 850/900/1800/1900 MHz; UMTS Tri-band: 850/1900/2100 MHz Gingerbread pre-installed Brilliant 4″ contour display Latest Google Mobile apps 1 GHz processor, 16 GB of internal memory Wi-Fi 802.11 b/g/n connectivity. It only…