HTC A8181 G2 Vision Google Android Unlocked Phone with 5MP Camera, Music Player, QWERTY Keyboard and Wi-Fi - Unlocked Phone - US Warranty - Titanium 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. Blazing fast 3G/4G-enabled, Android 2.2-powered smartphone with 3.7-inch touchscreen and slide-out QWERTY keyboard Compatible with T-Mobile's growing HSPA+ 4G network--up to 3 times faster than standard 3G networks 5-megapixel camera; 720p HD video capture; 4 GB memory; Wireless-N Wi-Fi networking; Bluetooth stereo music; personal and corporate e-mail Up to 6.5 hours of talk time, up to 420 hours (17.5 days) of standby time; released in September, 2010 Blazing fast 3G/4G-enabled, Android 2.2-powered smartphone with 3.7-inch touchscreen and slide-out QWERTY keyboard Compatible with T-Mobile's growing HSPA+ 4G network--up to 3 times faster than standard 3G networks 5-megapixel camera; 720p HD video capture; 4 GB memory; Wireless-N Wi-Fi networking; Bluetooth stereo music; personal and corporate e-mail Up to 6.5 hours of talk time, up to 420 hours (17.5 days) of standby time; released in September, 2010 It will not work with CDMA carriers like Verizon Wireless, Alltel and Sprint