I have an unlocked 4s. [all I did was call AT&T and asked and they unlocked it.] I'll be traveling to the Caribbean where they use full size Sims - Claro or Orange. I know next to nothing about this. There seems to be an incredible number of micro sim cutters on the market varying greatly in price, $.89 to $24.95. Can someone recommend a cutter? Why is the microsimcutter - http://www.microsimcutter.com/ - $24.95? I don't mind spending the money if it's almost fool proof. Unrelated to apple, but I'll ask anyway - can I buy a Claro sim in the US? I don't see it anywhere. Thanks!