LG Incite CT810 Quadband Unlocked Phone with Touch Screen, GPS, WiFi and 3MP Camera - Unlocked Phone - US Warranty - Silver Frequency: GSM/GPRS/EDGE: 850/900/1800/1900 MHz (Quad-Band). Business-oriented smartphone with Windows Mobile 6.1 OS, Wi-Fi networking, and 3-inch touchscreen Tri-mode 3G-connectivity; compatible with AT&T Navigator GPS turn-by-turn directions, AT&T Mobile Music, Video Share service, and Mobile Banking 3-mp camera/camcorder;Bluetooth stereo music streaming;MicroSD expansion to 32 GB;direct push email;access to instant messaging;digital media player Up to 8.7 hours of talk time, up to 504 hours ( 21 days) of standby time 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.