I'm on at&t and bought an iphone off craigslist a while ago. I don't have any data plans and i switched my sim from a little phone to the iphone and turned off any 3g or data plan. For about 5 months I didn't get charged until now as i guess i've been sending mms while turning on my data. Just wondering since they found out that i have an iphone on now, can i just switch back to my old phone, call them to block any data therefore they see that the IMEI on my phone isn't an iphone and then switch back to the iphone later. Is there another way to trick at&t to see my IMEI as a generic phone and not an iphone? Also will downloading one of the apn packages from http://www.unlockit.co.nz/unlockit/ work? thanks.