Haier M307S Unlocked GSM Phone with Dual SIM Card, FM Radio, Handsfree, GPRS, SMS and MMS-International Version with Warranty (Black) This unlocked cell phone is compatible with GSM carriers like AT&T and T-Mobile. Not all carrier features may be supported. Unlocked Dual-Band GSM cell phone compatible with 850/1900MHz frequencies and GPRS data capabilities. Dual SIM; Stereo FM Radio; Speakerphone; GPRS/MMS/SMS support; games; calculator; Alarm clock and T9 text input. Lightweight and Small; Mini USB Earpiece included; Polyphonic Ring Tones; Notes/Memo and Phonebook with 500 entries. Talk time up to 4 hours - Standby up to 174 hs.