Amoi CS6 Unlocked Cell Phone-International Version with No Warranty (Silver) This unlocked cell phone is compatible with GSM carriers like AT&T and T-Mobile. Not all carrier features may be supported. It will not work with CDMA carriers like Verizon Wireless, Alltel and Sprint. Tri-band GSM cell phone compatible with 900/1800/1900 frequencies and GPRS capabilities SMS/EMS/MMS messaging, voicemail, and email functions Intelligent speed dial; phone book memory with 200 entries Up to 5 hours of talk time, up to 100 hours of standby time