Samsung S5830 Galaxy Ace - Unlocked Phone - Black 3-inch TFT LCD capacitive touchscreen, DNSe sound enhancement, Stereo FM radio with RDS Unlocked Quad-Band GSM cell phone compatible with 850/900/1800/1900 GSM and HSDPA 900 / 2100MHz MHz 3G frequencies plus GPRS/EDGE capabilities Android OS, v2.2 (Froyo), 5 MP Camera with autofocus, LED flash, Talk time up to 11 hours - Standby up to 640 hours. Media player, Skype text input method and Gorilla Glass display. Bluetooth v2.1 with A2DP and microSD, up to 32GB. Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.