If a large SIM can be cut with scissors and turned into a small SIM, the small SIM can be slid into an insert (purchased for a buck or two, or simply cut out of

If a large SIM can be cut with scissors and turned into a small SIM, the small SIM can be slid into an insert (purchased for a buck or two, or simply cut out of plastic or cardstock) and turned back into a big SIM. I think it more likely that the sheer hassle of swapping out SIMs every time you want to switch devices (or take a phone call while using the iPad) will mitigate against doing this all the time. But there's no reason one couldn't do it. I'm leaning toward the "buy a WiFi iPad and an optional MeFi box" option at the moment -- that way I keep my phone a phone, diversify my wireless options, and get WiFi for my laptop as well as the iPad. But I will need to do a bit more research and budgeting.