A friend of mine has Sprint and was thinking about the unlimited everything. He currently is on the $40 data plan which includes use as "phone as modem" or tethering. The unlimited states you cannot tether on this plan. He asked if they somehow lockout tethering? Or would know about it? He uses PDANet. I told him they probably wouldn't lock it out...as they don't on at&t. I told him they would probably know if they looked, but probably wouldn't look at him, if he tethered with his current usage...which is not that much. I told him if he kept tethering 24/7...tons of Gigs, they would find him! Is this the case? he is not sure if he is going to change or not.