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Turning on airplane mode is an effective alternative method to turn off cellular data in Settings. When airplane mode is activated, it disables all wireless communications, including cellular data, Wi-Fi, and Bluetooth. This is particularly useful when you want to quickly disconnect from cellular networks and prevent your device from using cellular data without having to navigate through the settings menu to toggle it off specifically.

While restarting the device, updating software, or disabling Wi-Fi may have their own merits, they do not directly address the need to turn off cellular data immediately like airplane mode does. Restarting the device may temporarily disconnect services, but it does not guarantee that cellular data remains off. Updating software is intended for improving system performance and security rather than managing connectivity options. Disabling Wi-Fi does not impact cellular data use and may lead to increased data consumption if Wi-Fi is not available. Hence, activating airplane mode stands out as a straightforward and efficient alternative for disabling cellular data.