Press the ?Menu? button on your Android phone and tap ?Settings? to open the ?Settings? menu.
Within the ?Settings? menu, scroll down to the last option, ?About phone,? and tap on it. This will display the version number and build number of Android that is currently running on the phone.
Tap on ?System updates.? If an update to the Android operating system is available, the phone will automatically download and install it. If there are no updates available, the screen will say, ?Your system is currently up to date.?
Automatic Android Updates