I think I have an idea what the basics are, that for some it works and sometimes it can make a problem with Verizon, etc... But now that I'm actually going to do something and risk my account, buy an iPad specifically for this, etc... I want to be REALLY sure. What I'd like to do is get an iPad Air 2 4G, and put my Verizon Unlimited grandfathered plan sim into it. It's for a friend who is laid up, and I want them to have unlimited data (the idea of unlimited is worth as much as the unlikelyhood of them using more than say, 10GB of data which would cost far less, so I'm going to do this even with the low cost of data these days) for Youtube, Netflix, and so on. I know that I can't download iTunes shows (not an issue anyway) but other than that, is there any downside I'm missing, besides the cost/reward inefficiency for data? Will I risk my Verizon account having issues or interupting service (to the sim- I realize I'll not be utilizing the phone part of the service). But any risk for anything like misusing the service or so on? Is there anything else I should be aware of? This is the only thing I couldn't be positive of by reading and searching the forums, especially since this is something that can change with time. Thanks!