"If you switch on a cellphone on board, and there's no network, it will gradually increase the power it's transmitting because it's trying to get hooked on a network which doesn't exist, " he said.

CNN: In-flight phone calls to become standard, say experts

As such, we'll continue to see N-Series handsets already in development pop with S60 on board alongside mass-market Maemo devices as the platform matures to the point that Nokia can make the full switch by 2012.

ENGADGET: Nokia abandoning S60 for Maemo on future N-Series devices?