It's happened to me 4 time now. Once on the Victoria line and 3 times at different points on the Piccadilly line. Each time my phone displays an unknown caller but there is no sound when I answer (not to mention i look rather silly trying to answer a mobile on the tube).
I've even checked Bluetooth and visibility is off so it can't be anyone else on the tube with me, right?
I've even checked Bluetooth and visibility is off so it can't be anyone else on the tube with me, right?