Nowadays, you can use your phone on a plane without fear that the entire fuselage will fall out of the sky. However, you might still want to keep the phone on airplane mode (or off) during your flight, because a new revelation from the Snowden leaks claims that the NSA can listen in if you use your cell up in the air.

Le Monde and The Intercept report that British and American intelligence agencies have been monitoring cell phone use on commercial flights since 2005.

When you turn your phone on above 10,000 feet, it lets the NSA know your location, according to a leaked 2010 internal newsletter. The newsletter starts with a little riddle demonstrating the scope of the surveillance:

What do the President of Pakistan, a cigar smuggler, an arms dealer, a counterterrorism target, and a combatting proliferation target have in common? They all used their everyday GSM phone during a flight.

Using secret aerial stations on the ground, intelligence agencies can intercept signals in “near real time,” allowing them to extract data, including email addresses and Facebook ID data which they could cross reference with flight and passenger data.

Airplanes

These spy programs had cheeky names like “Thieving Magpie” and “Homing Pigeon,” according to Glenn Greenwald in his 2014 book No Place to Hide.

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So, you know, just one more thing to be afraid of when you fly — and yet another reason why you shouldn’t bring a Samsung Galaxy Note 7 aboard.

Photos via Flickr / travisolbrich, Getty Images / Bruce Bennett