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You can check for available software updates for your phone and download them. Follow these instructions to update your phone's software.
Before you can update the phone software, you need to install the program iTunes on your computer.
It's also recommended that you back up the phone memory. Click here for more information.
1. Start iTunes
2. Connect phone and computer
3. Update the phone software
Select your phone on the list of connected devices.
Follow the instructions on the screen to update the phone software.