I currently do not have a data plan. My plan is to add the unlimited data $15 a month to my current line, buy the Nexus One, insert the SIM card, get the phone running with my gmail account, then end the unlimited data $15 a month and use the Nexus One just with unlimited messeging, no data plan. I want to know if that will work or if at&t will recognize that I'm using a smartphone without a data plan and force me to get it.