HTC HD7 S T9295 Unlocked GSM Phone with 16GB, Windows 7 OS, Dolby Mobile & SRS Sound Enhancement, 5MP Camera, GPS, Wi-Fi, Bluetooth and FM Radio - Black This unlocked cell phone will work on GSM carriers like AT&T and T-Mobile. Not all carrier features may be supported. 3G-enabled Windows Phone 7 smartphone with extra-large 4.3-inch touchscreen for fast typing on virtual keyboard and excellent multimedia Windows Phone 7 OS provides easy access to social networking, personal/corporate e-mail, office apps, Xbox LIVE games, streaming media, and more 5-megapixel camera with HD 720p video capture; 16 GB internal memory; Wireless-N Wi-Fi; Bluetooth stereo music; GPS for navigation and location services Up to 4.5 hours of talk time, up to 276 hours (11.5 days) of standby time; released in June, 2011 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.