I have to say this is a very strange thing. Several times recently I've been on a train to Devon and lost my mobile phone signal for no apparent reason.What is the cause of my complete inability to answer phone calls and receive any messages on the train? Signal interference?
According to you, someone on your train may have been using a cell phone jammer. And the people who use it aren't far away.If you look around and see if anyone is carrying a small black box, that's what a hand-held jammer usually looks like