Sony Ericsson W705a Walkman Unlocked Phone with 3G, 3.2 MP, Stereo Bluetooth, and microSD (Silver)--US Version with 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. Unlocked quad-band GSM cell phone compatible with 850/900/1800/1900 frequencies and US/International 3G compatibility via 850/1900/2100 UMTS/HSPA plus GPRS/EDGE capabilities 3.2 MP Camera;Wi-Fi networking;Bluetooth music streaming; Walkman 3.0 digital media player Up to 9 hours of GSM talk time (4 hours on 3G networks), up to 370 hours (15+ days) of standby time What's in the Box: handset, battery, charger, 4 GB Memory Stick Micro (M2) card, USB cable, Sony software