Those of you who have gone this direction with your unlimited sim, I am curious as to how to go about it. Did you update your device information @ att.com/ipadlanding (IMEI, ICCID)? Right now I am using a jailbroken iPad Mini 1st Generation as a hotspot and I'm considering purchasing one of these as an alternative. I'm not exactly sure if the sim is the right size either between the iPad Mini and the hotspot itself. I hit 200GB this month. I just love this plan and want to do it right. Thanks!