Software updates are critical for every Android device. It’s a bit of a shame that most of these don’t receive even basic security updates, forget Android OS updates. There is no singular answer to that question as the exact steps vary by manufacturer, Android version, and sometimes even from one device to another even if both were made by the same company.
Open Settings. Most Android devices have a search option at the top. Search for Update. This will show you the System update or its equivalent setting. Tap System Update. Tap Check now or Check for updates. Now you will see an update if there is any. Tap Download and Install.