About menu
The About menu item mainly just exists to provide information about your device and the version of Android running on it.
In this section:
Allows checking for updates to the Android operating system, including new versions of Android.
Provides access to help guides or built-in help tips for your device.
Provides information about the cellular network you are currently connected to, including the signal strength and type of connection.
Provides information specific to this particular phone or tablet, such as the device serial number, model number, IMEI and networking addresses.
Provides information about the operating system software installed on the device, such as the Android version and firmware build number.