If i were to get a turbo sim card, could i use an alternative at&t plan on my iphone. example: get the 450 minutes with roll over minutes, unlimited data and messaging for $70 a month as opposed to getting the iphone data plan for 30 and unlimited txt for another 20 bucks and the 40 bucks for 450 minutes. so I would buy a att phone with the plan i want and take the sim out and put it in my iphone with a turbo sim card. Would that work. I would like to do this because It would be much cheaper than getting the actual iphone plan.