The cabin crew asks everyone to switch their phones to airplane mode, but you only realize halfway through the flight that yours is still connected. Have you put the aircraft at risk?

A pilot’s explanation offers some reassurance, while also highlighting why passengers should take the instruction seriously.

Aviation content creator @Perchpoint has described how mobile phone signals can potentially cause unwanted noise in pilots’ headsets. In his account, the interference resembled an insect buzzing nearby—a distraction when trying to hear and record instructions from air traffic control.

He said forgetting airplane mode does not mean a crash is imminent. However, his experience should not be taken as proof that cellular transmissions can never affect aircraft equipment.

The Federal Aviation Administration identifies potential interference with navigation and communication systems as the reason behind its restrictions on portable electronic devices. Operators can permit devices they have determined will not interfere with the aircraft’s safe operation. That makes the airline’s instructions more relevant than any blanket assurance shared on social media.

Another concern involves mobile networks on the ground. The Federal Communications Commission has explained that its restrictions on airborne cellular use were introduced to protect terrestrial networks from radio interference. Describing this simply as networks becoming “overloaded” misses that distinction.

Fortunately, switching to airplane mode does not necessarily mean putting your phone away for the entire journey. FAA passenger guidance explains that travelers can use an aircraft’s Wi-Fi service where the airline provides it, and that Bluetooth accessories may also be permitted. Follow the crew’s instructions about which connections you can enable.

If you realize you forgot to change your settings, switch to airplane mode as soon as you notice. This instruction is meant to manage potential interference, and complying is a simple way to support the crew while continuing to enjoy the electronic devices your airline allows.