How to upgrade Android

[Admin]

Updating your Android is actually very easy and also very safe to do.
You can only upgrade from:
(Example)
2.3.6 -> 2.3.7

You cannot upgrade from 2.3, 2.2, 1.2, 4.2, 3.0... to 5.0 because Google does not approve that. And because probably your device could not support it.
So you can only upgrade your device if you stay in the current Android version your device is and if you did not already updated it.
These upgrades usually correct minor bugs and other stuff so you might think it's not important but it is actually very important.
Okay so let's go.
First open the options app.
Scroll down at the bottom, at about the phone, click it.
Then open Update Manager and select "Check for updates".
Afrer that follow the instructions given.
Make sure you fully charged the battery before starting the upgrade because system files might be replaced so if you run out of battery, the device doesn't know how to react when the charger is plugged in so you get your device dead quickly, or other kinds of errors.
Make sure you HAVE the stock ROM installed with all the bloatware installed too.
Or the upgrade WILL FAIL.
Stay cool!