What Happens If You Forget to Turn Your Phone on Flight Mode on a Plane?

15 September 2023

There is something innate in human programming that makes it nearly impossible not to press the big red button – one of the most tempting examples of this is when airline passengers are instructed to turn their phones off. Humans possess a deep-rooted desire to disobey and push boundaries, simply to discover what happens next. This is particularly true when many people are unsure of the rationale behind such rules. While most individuals comply with the regulations, many still seek answers regarding the necessity of activating airplane mode during flight. Therefore, it is vital to understand the implications of not following this guideline.

Why Are Passengers Asked to Turn Off Their Phones During Flights?

According to the Civil Aviation Authority, “scientific research has shown that mobile phones can interfere with the normal operation of aircraft equipment and can also cause interference in pilots’ headsets.” The radio waves emitted by specific electronic devices can significantly disrupt a pilot’s navigation tools, radar systems, and even collision avoidance technologies. Moreover, while most mobile phones do not emit particularly strong radio waves, other devices, including Kindles, iPods, laptops, and handheld gaming consoles, can also release radio waves—especially in compact spaces.

Furthermore, Tamara Vallois, head of communications at Wizz Air, explains the issues associated with cellular connections in the air. “In the air, our mobile phones are out of reach of telephone towers, but our devices will still emit electrical signals searching for this connection. By enabling airplane mode, cellular and, in some instances, wireless signals are disabled, minimizing the risk of sending out radio frequencies that could interfere with critical aircraft instruments, such as navigation systems and communication devices.”

Is There Any Danger If a Passenger Forgets to Activate Flight Mode?

“If a passenger forgets to switch their device into flight mode, it won’t necessarily pose a danger,” Tamara confirms. “The staff would likely notice immediately if passengers neglect to activate flight mode due to the feedback noise caused by electrical signals emitted from various devices. Overall, while it may not pose a direct safety risk for the plane or its occupants, it could indeed be disruptive.”

Could This Rule Change in the Future?

Activating airplane mode has become second nature for numerous passengers, yet as technology continues to advance at an astonishing rate, many wonder whether this rule might eventually become obsolete.

“For now, it is essential that any device with a mobile connection remains in flight mode or turned off during a flight,” Laura states. “This practice protects against interference with navigation, radar, ground communication, and collision avoidance technologies. Additionally, many travelers view flights as an opportunity for some downtime—part of the journey to unwind, relax, and disconnect from the fast-paced world, often enjoying time to read or watch in-flight entertainment.” In fact, not having internet access often grants a sense of respite: a chance to truly switch off and enter holiday mode.

Recent developments indicate that phone calls are set to be permitted on EU flights in 2023. However, the implications of this change have sparked debate regarding the appropriateness of making calls while airborne.

Moreover, member states of the US and EU are collaborating to provide a 5G frequency band for aircraft. Although reactions have varied, this represents a significant shift in aviation technology. Laura notes, “Passengers in the EU will soon be able to utilize their phones in-flight. With recent regulations, airlines may implement new technology on board to connect to mobile networks, allowing functionalities such as calls and streaming apps mid-flight.”

“While it is not crucial for a plane’s functionality to have flight mode activated, it is a precaution taken by the flight crew to prevent potential interference and ensure focused operation during the flight,” Tamara elaborates. “As technology progresses, passengers may achieve data access without disrupting flight operations. Consequently, it would not be surprising if airlines and countries transition away from mandated flight mode in the future.”