Ever wondered why you're asked to put your phone on airplane mode during flights? It's a common request once the plane doors close and the flight attendants start their safety instructions. While it might be tough to disconnect, especially on longer flights, airplane mode is necessary. But what exactly is it, and why do airlines insist on it? Let's dive into the science behind this familiar practice and why it's still essential for your phone use during air travel. What is Airplane Mode? Airplane mode is a setting available on smartphones that disables all wireless communication features. When activated, it turns off the phone's ability to connect to cellular networks, Wi-Fi signals, and Bluetooth devices. This means that calls, text messages, and notifications will not be received or sent while airplane mode is active. The purpose of airplane mode is to prevent potential interference with aircraft communication systems during flight, making it a requirement for many airlines during the journey. Why Must Passengers Put Their Phones on Airplane Mode During Flights? Airplane mode is crucial during flights to prevent any potential interference with sensitive airplane systems. These systems, including communication and navigation systems, rely on radio frequencies emitted from the ground. However, cell phones and tablets also use these frequencies for various functions like Wi-Fi, Bluetooth, and data transmission. The problem arises when crosstalk or adjacent-channel interference occurs, where one radio receiver picks up transmissions from nearby frequencies, disrupting the intended signals. This interference can be compared to tuning into a radio station and hearing another station's transmission on a nearby frequency. Read more: Can Earthquakes Really be Predicted? Particularly during crucial moments like landing or emergencies, clear communication between the aircraft and ground control is vital. Airplane mode ensures that these communication lines remain open and interference-free. Additionally, with the advent of 5G technology, the risk of interference has increased, as signals from ground antennas and 5G devices might interfere with the airplane's radio altimeters, which gauge the distance from the ground during descent and landing. Therefore, using airplane mode helps ensure safe and uninterrupted communication during flights.