Samsung Keystone 2 GT-E1205Q Cellphone Unlocked, Black GSM 2G / Edge Dual-Band 850 / 1800 156 MHz Processor; 1.52" TFT Display Extreme Battery Life (Li-Ion 800 mAh Battery), Talktime: Up to 7 hours, Standby: Up to 720 hours Speakerphone, USB Port, 3 Embedded Games Mobile Tracker, MP3 Ringtones, Polyphonic Ringtone, Organizer, Voice memo 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.