USB Modem allows you to use Treo 600, Treo 650, Treo 680, Treo 700p, Treo 755p and Centro smartphones as a USB modem for connecting a desktop or notebook computer to Internet. To surf the Internet from your PC you will need only a USB cable and a Treo with GPRS/EDGE service or CDMA 1x/EvDO data plan. However, for more reliable work with Sprint or Verizon carriers you may need to purchase their tethering plan.

Features

    * Support for Treo 600, Treo 650, Treo 680, Treo 700p, Treo 755p and Centro smartphones
    * Support for Windows 2000/XP/Vista, Mac OS X and Linux operating systems
    * Support for USB and Bluetooth connectivity
    * Support for background mode so it is possible to make outgoing voice calls or perform other activity on the Treo without disabling the modem mode (if supported by the phone)
    * Small memory footprint (30 KB) 

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http://www.mobile-stream.com/usbmodem.html