As a pilot of a B757 I was amused by my cell phone going off at 3,000 ft on approach because I forgot to turn my captain cellphone off. It never caused a problem. It just said I missed a message. I didn't mean to do it, just forgot. I always stayed in tune with my wet compass so never let my heading change due to RF interference. With satellite nav with a minimal skill on using the wet compass no airliner should ever have a navigation problem. I practiced it all the time in my 757 heading south out of MIA.
We still have the magenta line followers that might have a problem. Not much we can do with them, I guess. I did the whiskey compass because I started in an Aeronca Champ and that is all I had. The B757 compass works the same way. The basics will always get you through, the Magenta line may if it is programed properly.