I know that there has been alot of talk about the mt3g and the fact that you can activate it by using a different sim with a data plan and then put your sim (without data plan) back in the mt3g and you can just use the wifi for internet but my question is... is it possible to upgrade the phone i have right now to the mytouch 3g and then cancel the data plan right away or do I have to keep the data plan with the 2 year contract???