How to Update Your Android Device
Google is typically releasing one or more major Android system updates each year. Each manufacturer then adopts the basic Android code with their own modifications for each particular device. Normally each device will also receive several updates between major Android releases in order to deliver bug fixes, improve performance, battery time and other things.
These updates can be delivered by the device manufacturer or the carrier you are using. Some manufacturers still update via PCs, that is, you have to connect the phone to a PC using USB, then use a special software from the phone manufacturer (for example Samsung has Kies). But most updates these days are coming OTA or Over The Air, which means the upgraded software will be delivered through WiFi or 3G/4G/LTE.
You can check if there is any update for the device by starting in Settings:
Settings -> About Phone -> System updates -> Check now
|1 Tap About Phone||2 Tap System updates||3 Tap Check now|
But you may well remember the old saying: if it ain't broke don't fix it. If your Android device is working just fine for you then perhaps you shouldn't bother to check for any updates.