Originally Posted by TrainDriverSparky

I emplore anyone who has one of these devices to NEVER use it on or near train.

The railway is gradually moving over to GSM-R as the method of communication between driver and signaller/electrical control room. If you've 'jammed' our method of communication in an emergency because you can't cope with a Walker-Talker in the quiet coach and something bad happens, then you deserve for the book to be thrown at you.