Palm Treo 680 Unlocked PDA Smartphone with MP3/Video Player, SD/MMC-U.S. Version with 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. Quad-band GSM cell phone compatible with 850/900/1800/1900 frequencies and GPRS/EDGE data capabilities Fully integrated phone and PDA with QWERTY keyboard; runs Palm OS and supports Word, Excel, PowerPoint, and PDF files VGA camera/camcorder; Bluetooth for handsfree devices; digital audio player; expansion via SD memory cards Up to 4 hours of talk time, up to 300 hours of standby time