What is the purpose of placing a device in airplane mode?

The purpose of placing a device in airplane mode is primarily to prevent data transmission while the device is locked. When airplane mode is activated, all wireless communication functions are disabled, including cellular, Wi-Fi, and Bluetooth connections. This is particularly important in situations where sensitive information may be stored on the device, or where secure handling of evidence is critical, such as in forensic examinations or during law enforcement operations.

By locking the device and enabling airplane mode, you ensure that there is no potential for remote wiping, tracking, or unauthorized access to the data stored on the device. This safeguard maintains the integrity of the information and prevents any changes or alterations that could occur if the device were connected to a network.

The other choices may reflect important considerations for device management, but they do not capture the primary function of airplane mode. For instance, increased battery life may occur as a result of turning off connections, but it is not the main reason for activating airplane mode, nor does it directly relate to the preservation of data integrity.