Hi, I'll be visiting Japan a lot from the next year (2013) for about two years. I've been looking around for cheap prepaid sims, but through research I learned that there's no way of BUYING a sim card, you must buy it with the phone. I'm aware that it is possible to rent a sim card, however the prices are too high and I'd rather stick with just one sim card. SO, I came up with the idea of buying the cheapest Japanese phone and then cutting the sim card into a micro sim, as you do, and then moving it into my iPhone. MY QUESTION BEING: Would this work? Thanks in advance! PS - also, are there any pay as you go plans with unlimited data? Or credit that lasts for a month or so with unlimited data?