Airplane mode on Android devices disables all wireless communication technologies, including cellular service, Wi-Fi, and Bluetooth. The primary function is to eliminate potential interference with aircraft communication systems during flight. This is achieved by cutting off all radio frequency signal transmission from the device.
The ability to re-enable certain communication features, specifically Bluetooth, after activating airplane mode offers significant convenience. It allows for continued use of wireless headphones, fitness trackers, and other compatible devices while adhering to airline regulations concerning radio frequency transmissions. Historically, airplane mode was a strict on/off toggle for all wireless services, but advancements in technology and changes in airline policies have led to this more flexible approach.