Over the weekend, Sprint announced it's handing out one of its 3G / 4G dongles free of charge to its customers -- with a catch, though. The gratis U602 Plug-in-connect can be yours now if you're rockin' an American Express Prepaid Reward Card, getting a new line or willing to sign a fresh two-year deal. And, if those options aren't tempting enough, you'll unfortunately have to part ways with a mere 50 bucks in order to take one home. However, don't expect this Now Network USB connector to let you surf on those promised LTE waves, since beloved WiMax speeds (with 3G as a fallback option) are all you can get. Sound good? The Plug-in-connect is up for grabs now at your local store or via the source link below.