Airplane mode is a setting available on smartphones and other portable electronic devices that disables all wireless signal transmissions, including cellular, Wi-Fi, Bluetooth, and other radio-frequency communications

. When activated, airplane mode suspends the device's ability to send or receive calls, messages, and data, effectively turning off analog voice and digital data services

. The mode is named because airlines require passengers to disable wireless transmissions during flights to prevent potential interference with aircraft communication and navigation systems, although modern aircraft are well shielded and the risk is minimal

. It is typically used during takeoff and landing, times when safety protocols require passengers' full attention, and to comply with regulations that prohibit radio transmissions in flight

. Even with airplane mode on, some devices allow the user to manually enable Wi-Fi or Bluetooth if permitted by the airline, and GPS functionality remains active since it is receive-only and does not transmit signals

. Besides aviation safety, airplane mode is also useful for saving battery life, avoiding roaming charges, and enhancing privacy by preventing wireless tracking or hacking

. In summary, airplane mode turns off all wireless communications on a device to comply with airline safety rules and reduce interference risks, while still allowing offline use of apps and content