The last message from the a/c was "Ok - roger that" Isn't that rather an unusual response when leaving one ATC for another, surely you always give your callsign?
It may be "wrong" but then I'm afraid not all of us comply 100% all of the time to the phraseology described the various manual of R/T...
As for cell phones and aircraft (yet again), hands up all those who have flown between say western europe and the far east and never, ever found the likes of a "welcome to CIS telecom" ( or something similar) text on their phone on arrival in NRT.....
