Samsung C166 Unlocked Phone--International Version with No Warranty 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. U.S. version dual-band GSM cell phone compatible with 850/1900 frequencies and GPRS capabilities Affordable, simple-to-use candybar phone easily slips into your pocket--just 2.5 ounces Speakerphone; SMS text messaging; T9 predictive text entry; 300-contact phonebook capacity Up to 2.7 hours of talk time, up to 150 hours (6.25 days) of standby time