Software version: Nokia Lumia 521


Learn how to check the software version and see official versions for the Nokia Lumia 521.


In November 2014, 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, including Windows 8.1 and Inflight texting.


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):

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)


Back to top



Software update: Automatic (OTA)

This software update(s) was available to your phone in November 2014. Your phone notified you when it was ready to update. Follow the on-screen prompts to complete the OTA update. If your phone did not receive 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) was 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 after the first update is complete.


Back to top



Software update: Download

You can download and install the software update from your phone. To check for updates and download the update from Microsoft, 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 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.



Back to top