they were on about being able to make calls for free from your phone on the aircraft, as the calls could not be traced and therefore charged by the telco.
Don't fall for that or it may prove very expensive for you.
Some years ago I used to fly all around Australia, I regularly used my mobile in flight as did everyone on the flightdeck.
When I got my first bill after starting to do this, at first I thought someone was ripping me off as I had never been to all these unusual places on my bill.
Then I realised it was the stations/masts whatever we were flying over when I was on the mobile.
Be careful, you will be billed................