How to update / upgrade Android OS?

Step 1:
Navigate to the Setting menu from your android mobile.

Step 2:
Scroll down the Setting menu a click on 'About Phone' or 'About Tablet'. This section of the menu will detail which version of Android your device is running.

Step 3:
The menu can vary slightly from device to device but click the 'Software Update' menu.

Step 4
Your phone or tablet will now search for an available update. If you are taken to another menu, select the 'Software update check' button or similar.