Hey guys. I'm going to Japan pretty soon to live there for a year and will most definately be signing up for a cell phone. Theirs are a good 5 to 10 years ahead of ours and I would love to be able to bring it home to use the unit here in the states afterwards. AT&T and some others claim their GSM network is based off Japanese and European cell structures, so in theory there might be some chance that tossing in the sim somehow would allow me to use their towers, provided I got a plan with them. What do you guys think?