A TikTok video filmed by a pilot is drawing renewed attention to a long-standing airline rule: switching phones to airplane mode during flight. While many passengers assume it’s a formality or outdated regulation, the pilot warned that it’s a vital safety measure and that ignoring it could interfere with cockpit communications.

The video, which has amassed over 1.2 million views, features a commercial pilot explaining that mobile devices not set to aeroplane mode can emit signals that interfere with pilot headsets. “Even if just a few passengers leave their phones on, those signals can create radio interference, sounding like a mosquito in the ear, while we’re communicating with air traffic control,” he said.

The explanation has caught many viewers off guard. “Thank you for sharing this. I really didn’t think it actually mattered,” one user commented.

Telecom company Airalo, which specialises in eSIM travel connectivity, has since weighed in, reinforcing the pilot’s message.

In a statement, Airalo noted that electromagnetic signals from phones can disrupt sensitive aircraft systems, particularly during takeoff and landing, the most critical phases of flight.

“The rule on aircraft is that passengers should switch their phones off for takeoff and landing,” the company said. “Most airlines now permit the use of smartphones in aeroplane mode during flight, but the risk of interference with communication remains if that mode isn’t enabled.”

Experts emphasise that while a single phone may not pose a major problem, the cumulative effect of dozens of active devices can increase the risk of disruption.

Signals from mobile phones can interfere with communications between the cockpit and ground control, especially in low-altitude environments.

Despite advances in aviation technology, safety regulators around the world continue to mandate the use of aeroplane mode as standard practice.

Nighttime flights, adverse weather conditions, and high-traffic airspace all increase the importance of maintaining clear, interference-free communication.

The pilot’s message is clear: airplane mode is not optional, it’s part of keeping everyone on board safe.