You can force your Android phone or tablet to search for an update from the Settings menu on your device, but you should note that just because a newer version of Android exists it doesn't mean it will be available for your device - now or ever.
In this article we'll guide you step-by-step through how to update your Android device.
Before you try to update your device, you should check which version of Android you are running - you might already be on the latest version. If you follow this guide, we'll show you how to check your Android version along the way.
The latest version is Android 7 Nougat, which will become available for more devices over the coming months. Marshmallow is 6.x, Lollipop is 5.x, and KitKat is version 4.4.x, with 4.3, 4.2 and 4.1 all coming under the codename name Jelly Bean.
If your device is running anything lower than Jelly Bean, then unless you've simply never updated the software it's very unlikely that an update will be available - the manufacturer probably doesn't support this device any longer