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It's recommended that you update your phone with the newest software, as the manufacturer continuously corrects errors. It's a good idea to back up the phone memory first. Before you can update the phone software, you need to set up your phone for internet.
1. Find "Phone update"
Slide your finger downwards starting from the top of the screen.
Press All settings.
Press Update & security.
Press Phone update.
2. Update phone software
Press Check for updates. If a new software version is available, it's displayed. Follow the instructions on the screen to update the phone software.