Software version: Nokia Lumia 521

    Learn how to check the software version and see official versions for the Nokia Lumia 521. Find out more on this page:


    Beginning November 4, the Lumia 521 received a two-step software update to Windows Phone 8.1 firmware revision 3058.50000.1439.0042. The first step is available Over The Air (OTA) or through manual download and provides no new features or improvements.  It only allows for optional manual download of the second step. The optional second step provides features and improvements

    New Features

    • Windows Phone 8.1


    • Inflight texting support

    Important: The second step of the update, which includes Windows Phone 8.1, is optional and will not be pushed automatically.  In order to complete the optional update to Windows Phone 8.1 you must manually check for updates and install the second step.  See: Software update: Download


    Software version

    Software update: Automatic (OTA)

    Software update: Download




    Software version

    Check the software version

    To check the current software version, follow these steps:


    1. From the home screen, swipe left to Applications.
    2. Tap Settings.
    3. Tap About.
    4. Tap More Info.
    5. Read the Firmware revision number on the phone, and check it below:


    Firmware revision numberStatus


    3056.4000.1404.0034 (OS version 8.0.10532.166)

    Your software is up to date. There are no updates available.


    This document will be updated if and when new software is available.





    Your phone can update to version 3056.4000.1404.0034 (OS version 8.0.10532.166):

    If the update fails, see: Software update troubleshooting.

    Other versions

    Your phone has non-T-Mobile software, and it is unsupported. The manufacturer and T-Mobile cannot update your software.



    Requirements to update

    To be able to update to the current software version, the below requirements must be met:

    • 50% or higher battery life
    • Wi-Fi or data connection
    • 321 MB available memory (File size of update: 321 MB)


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    Software update: Automatic (OTA)

    Update automatically Over-The-Air (OTA)

    This software update(s) will be available to your phone after November 4, 2014. Your phone will notify you when it is ready to update. Follow the on-screen prompts to complete the OTA update. If your phone has not received an OTA message, see Software update: Download below.


    Note: Only the update to Firmware revision 3056.4000.1404.0034 (OS version 8.0.10532.166) will be pushed via OTA.  To update to Windows Phone 8.1 / Firmware revision 3058.50000.1439.0042 you must manually check for updates from the phone once the first update is complete.


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    Software update: Download

    Download and install software update

    You can download and install the software update:

    From the phone



    Update software from the phone

    To check for updates and download the update from the Microsoft servers, follow these steps:

    Note: If you have not already received the first update to Firmware Revision 3056.4000.1404.0034 (OS version 8.0.10532.166) via OTA, you will need to complete this process twice if you wish to update to Windows Phone 8.1.


    1. Connect to a Wi-Fi data connection.
    2. From the Home screen, swipe left.
    3. Scroll to and tap Settings.
    4. Touch phone update.
    5. Touch check for updates.
    6. Follow on screen prompts.
    7. Wait as your phone restarts, updates, and restarts again.



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