This phone is a GSM Treo 650 that is Refurbished. Its unlocked and can be used on any GSM network(Cingular, T-Mobile, international, etc) with and sim card. Fully integrated phone and PDA with digital video and camera capabilities. It comes individually boxed with original sync cable, charger, stylus, battery, and cd copy. Integrated Bluetooth technology Vibrant 320 x 320 touchscreen display Backlit QWERTY keyboard Email access to Microsoft Exchange Server 2003 using VersaMail Unit Weight: 6.2 oz.Size (in inches): 2.36 x 4.41 x 0.8790 Warranty included with this purchase Technical Data User Interface:Text Message Indicator, Voice Mail Indicator Display Size: 4 lines Size & Weight:4.41 x 2.36 x 0.87 inches 6.2 oz. Advanced Messaging:SMS Messaging Two Way Web & Data Features:Modem Power:Minimum Rated Standby Time: 60 hoursMinimum Rated Talk Time: 150 minutesBattery Cell Composition: Lithium IonCharging Time: 2 hours Extras:Personal Information Manager, Alarm Network Compatibility:GSM Components: Treo 650 Smart Device, AC charger, USB Hotsync cable, Hands-Free Headset, Synchronization Software CD ROM (Windows and Macintosh)