T-Mobile offers its factory-refurbished T-Mobile Jet 2.0 Mobile Broadband USB Adapter bundled with a $15 Prepaid Data Refill Card for $19.99 with free shipping. That's a buck less than the lowest total price we could find for the adapter alone elsewhere, although we saw this bundle for $10 less early last month (since expired). Sales tax is added where applicable. The Jet 2.0 USB adapter provides mobile broadband Internet access to your laptop on T-Mobile's network. It also features a microSD card slot.