So I guess I could buy one in the US and just carry it home in my luggage? I hate phones on trains, people are such twats and have no conception of manners ( said ranty Daily Mail reading pensioner....) anyhoo, there ought to be a "Mobile" carriage where you CAN use the phone with a blanket ban otherwise. I believe such behaviour is considered appalling in Japan....
Racedo is right ( again ? really ? ) ! Don't even think about using them in flight! Plod would have a field day....