Airplane mode is a setting that disables the wireless communication abilities on a phone.

Airplane On/Off Widget allows you to switch ON and OFF the Airplane mode setting.
==>Support Android 4 (a restart of the device is needed in order to show the widget in the list)

With Airplane Mode ON the battery lasts longer: the device has no connectivity therefore it has no reason to search continuously for reception.

With Airplane Mode ON your privacy is safe: avoididing unwanted calls and ending all active network connections.