Mobile phones.

[ExXB]

Originally Posted by Davef68

I do hope using mobile phones on flights doesn't catch on - imagine 100 people all talking at once "I'M ON THE PLANE"

Just because some airlines have pico cells, it doesn’t mean it’s cheap.

[Heathrow Harry]

Another way of extorting cash while keeping ticket prices apparently low...................

[PAXboy]

I have used the in-flight phones once or twice but once with total success. Mostly, they have not connected and I rarely see other pax using them. I don't think they will ever really catch on. On the other hand, links from your own mobile/cell, might prove more popular for simplicity.