Final answer:
Airplane Mode is the mobile device feature that disables cellular and wireless communication.
Step-by-step explanation:
The mobile device feature that disables cellular and wireless communication is Airplane Mode. When Airplane Mode is enabled, it turns off all wireless functions on the device, including cellular, Wi-Fi, and Bluetooth connections.
This feature is commonly used in situations such as on airplanes and in hospitals where radio frequencies from communication devices can interfere with important communications or medical equipment.