Yes, you can absolutely just turn your phone off on a plane as an alternative to using "Airplane Mode." The primary goal of FAA and international aviation regulations is to prevent cellular signals from interfering with the aircraft's sensitive navigation and communication systems. A phone that is completely powered down emits no radio frequency (RF) signals, making it 100% compliant with all safety standards. In fact, turning your phone off is actually the "safest" and most battery-efficient option for long-haul travel. However, the reason most people use Airplane Mode is that it allows you to continue using the phone's non-transmitting features, such as watching downloaded movies, listening to offline music, or connecting to the ship's onboard Wi-Fi (which is a separate, safe low-power signal). In 2026, while many modern aircraft are being equipped with "5G-Safe" technology that may eventually allow for standard cellular use, current protocols still require you to either switch to Airplane Mode or keep the device completely powered off from the moment the cabin door closes until the aircraft has safely landed.