Do You Call or Text on Your Smartphone During an Airline Flight?

If you do, the usual gaggle of spies are listening in.

At this point, if you don't use an end-to-end encryption app for phone calls, it's pretty safe to assume that somebody is listening in. Even if the NSA isn't supposed to spy on Americans, the GCHQ and the CSIS can. There's really nothing to stop them from sharing.