hello, just picked up a rooted thunderbolt with sense. the 4g is blazing fast on the phone itself. getting 20 mbps dl's with 100 ping. so I got all excited and tried the wifi tethering with barnacle, which is the app my friend recommended. its slow. 1 mbps at best, about the same as my iphone 4 on at&t and not as reliable. what gives? is there a usb tether available for rooted tbolts that can take advantage of the 4g speed? thanks!!!