In the new update, you will get a Smart Sidebar to have more controls, 3 finger screenshot has been included as a new gesture, Animated wallpapers for your lock screen and home screen, Dual Mode Music Share is one more new feature, so you can share music with others, etc. The download size is about 2GB.
Follow these steps:
1. Go to the Software updates section in Settings
2. Choose "Download updates manually".
3. After the successful download, click on the install
4. Phone will restart automatically to implement the updates.