I have an iPhone with Rogers (Canada) and am in Japan for a month. Things work well with the iPhone roaming except the GPS - Maps, InstaMapper and any other gps related service will not work. The GPS worked great in Canada. Anyone know if it is something I should be able to fix? I am roaming on NTT's network - service is fine otherwise. I also have a p905i (from NTT) that works fine with GPS - so I know the GPS signal and service is ok.