High Altitude Mobile Phone Reception
I know this is not a Computer/Internet question, but I thought this was probably the best place to ask it.
I've just landed in Hong Kong after a flight from Los Angeles, which flew over Kamchatka and Korea enroute.
I had dutifully turned off my mobile phone but I had forgotten to turn off my second phone and I was surprised to see when I looked at it, that I had a "welcome" SMS message from a Russian phone carrier and that my phone had set itself to the Seoul time-zone.
Is it normal to be able to connect in this way from such high altitudes?