In general, Android updates are provided by your carrier. How you access OS updates varies, but there are a few things you should do to prepare your phone or tablet before you start downloading.
How to Update an Android Device | How to Update to the Current Android Operating System
The newer your phone, the faster you’ll get OS updates, with Google’s Pixel phones getting them first. Folks with phones running older OS versions will have to jump through a few hoops first, or may not be able to update at all.
Here's how to find out what version of the Android operating system you're running, how to get operating system updates, and what to do if you don't want to wait for your carrier to release an operating system update.
On a Pixel phone, you’ll get OS updates within a few days of their release. You’ll receive a notification with a prompt to download the update. On most Android phones, you can check for system updates in Settings. If one’s available, you’ll see information about the update with a download prompt.
