Hi, There has been a lot of good info regarding using foreign iPhones in Japan, but I'm wondering if it's time to for an update to keep things current. From what I've read, the situation with the carriers is fluid and doesn't always seem logical. Here's my situation: I'll be traveling to Tokyo for a week in late June early July 2010. I'm hoping to use my unlocked (& jailbroken) iPhone 3GS. I'm more interested in data than voice. Ideally, I'd like to buy a sim card and drop it in my iphone and be done. Are things that simple yet? Thanks in advance for any help.