I previously had a Cingular Treo 680 with an unlimited data plan. In order to retain my company's discount, I hacked my iPhone to keep the same SIM card. And today, when I went to pay my bill online, I found that my Device has been changed to an Apple iPhone. Are they monitoring the phones we use? If so, are they going to slowly weed out those of us who by-passed iTunes activation (change to appropriate calling plan, freeze/cancel account, etc.)? What do you think?