While it’s quite easy to find notebooks with a built-in 3G modem in this day and age, it’s much less likely that you’ll find a netbook with a built-in WiMAX modem down the street. A video of a netbook prototype from a subsidiary of Quanta was surfaced, apparently taken during the WiMAX forum in Taipei recently. Thanks to the built-in WiMAX modem, you’ll be able to connect to 4G mobile broadband networks without having to use those pesky USB dongles. Quanta itself doesn’t sell computers under its own name, but manufactures PCs for other big name computer vendors. You can check out the video of this prototype netbook after the break.