It's important that you update your mobile phone with the newest software, as the manufacturer continuously corrects errors. It's recommended that you back up the phone memory first. Remember, you need to set up your mobile phone for Internet.
Find "Software update"
Slide two fingers down the display starting from the top edge of your mobile phone.
Press the settings icon.
Press About phone.
Press Software update.
Update phone software
If a new software version is available, it's displayed.
Follow the instructions on the display to update your mobile phone's software.