I am gonna purchase a straighttalk sim for my iPhone 5, but they dont have nano sim for sell right now so I guess I will have to buy a micro or standard sim then convert it into a nano sim. As I know the nanos are a bit thinner than the standard and micro. I should purchase a standard sim or a micro sim to cut down with a cutter? Anyone here tired to convert? Is the thickness of the standard/micro sim gonna work with the iPhone 5 sim tray?