Nokia 1600 Unlocked Cell Phone--U.S. Version with Warranty (Gray) 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. Dual-band GSM cell phone compatible with 850/1900 frequencies Affordable candybar-style phone with oversized numeric keypad Supports SMS, picture, and instant messaging Up to 5.5 hours of talk time and 450 hours of standby time