I just upgraded to 3.0 from my hotel room in Osaka and it worked fine. I put the phone into airplane mode before upgrading, but after the firmware update finish

I just upgraded to 3.0 from my hotel room in Osaka and it worked fine. I put the phone into airplane mode before upgrading, but after the firmware update finished, it was out of airplane mode and communicating with the Softbank mobile network again, so I don't think it made any difference.