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You can update the phone's software when a new software version is available.
Before updating your phone's software, it's recommended that you back up the phone memory. Click here for information on how to back up the phone memory.
Before you can update the phone software, you need to install the program Zune on your computer.
Connect phone and computer
Update phone software
Depending on your settings in Zune, the program may suggest to update your phone automatically.
Select SETTINGS at the top of the display.
Follow the instructions on the display to update your phone's software.