To check for available updates over-the-air (OTA update):
1.- Make sure your device is connected to Wi-Fi.
2.- Open the Settings application.
3.- Select About phone-Wireless update
4.- Click on Check update
It will show, if your system up-to-date
5.- The System Update will be installed.
Depending on the operating system, you will see Install Now, Restart and Install, or Install System Software. Click. The phone will reboot.