Sprint's new product the Overdrive is turning some heads. This slick portable WiFi device boosts your mobile devices 10x faster with 4G connection. The Overdrive is priced at $99 and can support up to 5 different devices and fits discretely in your pocket. As of now the Overdrive's 4G service is only available in select cities with a monthly subscription plan. Check out Sprint's commercial below showing the Overdrive helping out an iPhone user using AT&T's 3G service.