Sony Ericsson M600i Unlocked Cell Phone with 3G, MP3/Video Player, Memory Stick Micro Slot-International Version with No Warranty (Granite Black) Unlocked cell phones are compatible with GSM carriers such as AT&T and T-Mobile, but are not compatible with CDMA carriers such as Verizon and Sprint. Unlocked tri-band GSM 900/1800/1900 cell phone with International 3G compatibility (2100 UMTS) and GPRS data capabilities Symbian OS smartphone with dual-function QWERTY/numeric keypad; 2.6-inch touchscreen; included stylus Digital audio player; Memory Stick Micro expansion; 60 MB internal memory; Bluetooth stereo music; access to personal email Up to 7.5 hours of digital talk time and 340 hours of standby time This cell phone may not include a US warranty as some manufacturers do not honor warranties for international version phones. Please contact the seller for specific warranty information.