As for the the ringing, I spoke to a good friend who is a system tech at Verizon this AM, this was his reply:
He's explained how the system works in the past, and essentially they mobile system always knows where the nearest cell tower is, which is how they can streamline the data capacity needed throughout the system. If you are on the interstate driving and turn your phone off for an hour, when you turn it back on, it has to establish a hand-shake with the nearest tower - but until you turn it back on, if a call is made to your phone, the system will start at the last known location and starting pinging the phone waiting for a response. Once it gets one, it routes the call to the nearest tower and the call connects. If it does not, it goes to VM. In this case, since the last known location of any of these phones was likely a few miles off shore, a call will result in the system first reaching from that tower, then spreading from there. Not knowing the systems used over there I couldn't begin to speculate on how they work (though I do know that, generally speaking, the mobile systems in most Asian countries make ours look pathetic), but based on what my friend told me it would not be out of the ordinary for a roaming phone to ring on the caller's side while the system attempted to locate the recipient's phone.