I usually fly SQ and for years their IFE handset has had a built in phone. Swipe your CC and off you go.... natter, natter, natter.
To date never seen anyone use this feature - costs a fortune per min, so guess if the airlines price the mobile phone per minute rate similarly then, me thinks, you're not going to see many people use it.
Personally I'd say ban 'em as I usually need the rest.
Flynerd - As for the 737 and wifi/bluetooth. It first flew 04/09/67, so hope Mr Boeing have upgraded the wiring design since then
