Air Fungus is another no CD airline.
As an ex avionic engineer I can also testify to the serious problems with mobiles. On nightshift at LGW doing full autoland tests on a 737-436 I recieved a mobile call in the middle of the check and I can only say that the results were frightening. An aerobatic approach would have been an understatement and we had to drop all power off the a/c to get it working again.
A friend of mine in flight crew has found a simple answer, usually the hunting sound of a cellphone transmitting can easily be heard on crew headsets at which point he makes a PA announcement along the lines of ' will the pax who is using their mobile phone please turn it off immediately as we are aware where you are located in the aircraft and this is a serious breach of aviation law'
Apparently the resulting scramble in the cabin (especially business class) is like something out of a carry on movie.
One idea might be to provide passengers with a sealable bag in which the boarding card/seat no and offending phone could be put and secured by cabin crew, untill the end of the flight. A few obvious posters in the jettys to the aeroplanes detailing penalties for using phones and the effects might wake a few people up.