[Darkjedi]

Using ICS shouldn't be a problem as long as you don't go overboard with the tethering (i.e. downloading DVD's daily). So if you don't feel like shelling out cash for PDA.net you can use the method nxtech3. If you really want to be on the safe side, then use PDA.net as that registers the data download as distinctly going to your phone. With the right registry edits, your carrier shouldn't be able to tell the difference between ICS and PDA.net however.