BLU S51 Charleston Touch Unlocked Dual SIM GSM Phone - US Warranty - Blue This Unlocked Dual SIM Cell Phone is compatible with GSM carriers like AT&T and T-Mobile. Not all carrier features may be supported. It will not work with CDMA carriers like Verizon Wireless, Alltel and Sprint. Unlocked Dual SIM Quad-Band GSM cell phone compatible with 850/900/1800/1900 mHz (Both SIMs) plus GPRS/WAP data capabilities. Dual SIM Support with Dual SIM Standby; 2.4-Inch TFT Touchscreen; MP3/MP4 Player; FM Radio and Social Hub: Facebook and Twitter. 1.3MP Camera, 1280 x 1024 Pixels; Bluetooth; MicroSD Card Slot; Analog TV Connectivity; MP3 Ringtones; Instant Messaging: MSN and Yahoo and WAP Browser. Talk time up to 3 hrs 30 min - Stand-by up to 150 hrs.