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Lumia 520/521Devices Unusable After Using Windows Phone Recovery Tool: Please Read

For users with Lumia 520/521 devices that have become unusable after an attempted recovery using the Windows Phone Recovery Tool (WPRT):
 
We have been gathering your feedback and actively researching the situation.  We have important updates to share:
 
Failures:
Devices that have failed to recover appear to fall into one of two different states:

  • Displaying a red Nokia logo
  • Displaying a black screen and the device is non-responsive after attempting to boot.
 
Issue Identification:
Although our investigation is not complete, we’d like to share some initial insight into what we’ve uncovered:
 
Data writing size & speed:  It was discovered that some devices are having trouble accepting the recovery image data being flashed.  The blocks of data were too large for some devices to handle, and the memory on the device was having trouble with the speed at which the data was being written.  In short, devices were getting too much data, too quickly.  This would cause the failure as the new software is corrupted.
 
Small portion of 520/521 devices affected:  As we reviewed logs and worked through issue reproduction, we identified the subset of affected 520/521 devices that may encounter this issue.  There is no direct way for an end-user to check their device unfortunately, however it is positive news that not all units would experience this issue..
 
Changes:
As a result of these findings, we are making two key changes to the way the recovery tool (WPRT) works.  We will be lowering the size of the data blocks being fed to the device during recovery (lowering from 2MB down to 128kB), and we will also be slowing down the data writing speed (from 8MB/sec to 5 MB/sec).  Testing has showed promising results from these changes.
 
To implement these changes, we have released an updated version of the WPRT tool.  You may notice when launching the WPRT that it checks for updates automatically.  Before attempting any further recovery or flashing on 520/521 devices, ensure that you’ve closed and re-launched the WPRT.  It will find this new mandatory version and automatically update.
 
Before we re-enable the update path from WP8 to Windows 10 Technical Preview for these devices, we will be reaching out to users to do a bit of additional real-world testing.  Once we’re confident in the results, we’ll turn the update path back on for these devices.
 
User Expectations & Recovery efforts:
For users who have already unusable devices, we’re continuing to research this situation.  There is no guarantee that using this updated version of the tool will recover an already-bricked device.  If your device is showing the red Nokia logo, please do the following:

  • Ensure your device has a good power source (connected via USB cable that can transfer data and charge the device simultaneously)
  • Close the WPRT, re-open, and take the update to the new version of the WPRT.  The new version is 1.2.4
  • Once he new version is installed, re-attempt the flashing process.
  • If your device is not recognized, click the "My phone was not detected" button and continue the attempted recovery process
If your device is on a blank/black screen and is unresponsive, you may attempt the same steps as listed above.  Devices that do not have the red Nokia logo on the screen are in a different state and will not have the same recovery rate should they be recoverable.  Please do try to recover and share your results.
 
Please check back for additional details and updates.  More information will be shared as it becomes available.
 



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Nokia 520 rollback from windows phone 10 red Nokia screen used Lumia recovery tool. had to run about 6 times but all well now

Thanks for the update. I have an unresponsive 620, and the updated WPRT was not able to detect the device.

I have an unresponsive Lumia 810 and the updated tool doesn't detect it.

It is not just the 520/521.  My 920 had the same issue.  Black screen and the new recovery tool still does not recognize the phone.

My 520 comes not in the Flashmode. Pressing Power and Volume down does not vibrate.My 520 is completely dead and I think it does not Charge. By the 1.0.0 Version it has the Red Nokia Screen but it breaks down the flashing several times. Then I have this result that the Phone does nothing. So Please what can I do?

it is not only appearing in l520,525,526, it also in lumia 620 and 920 and other device also..

and there is no detecction in new WPRT. and it do not vibrate.

Plz do some as possible as fast ...

I have only one lumia 620 and now device unrisponsive...


this update does nothing ... lumia 521 not even seen by the recovery tool ... blank screen

this update does nothing ... lumia 521 not even scene by the recovery tool ... blank screen

This is part of what we need to uncover.  The changes in the tool should prevent future 520/521 recovery attempts from ending up in a bad state, but we needed some feedback on users that had already hit each of the two scenarios noted above.  Your device is in scenario two it seems.  Were you able to click the "my phone was not detected" button?  Any feedback to that regard?

Thank you for trying it out.  Appreciate the feedback.

For users with devices outside of the 520/521 series, we are still researching.  The changes mentioned in my original post above will only affect 52x series devices when using this tool.


I tried on my 925 which ended up with the black screen non responsive after the red screen error.

The new build WPRT build 1.2.4 says device could not be found.  A soft reset did not help either.

Do you want us to ship our phones to you?


Use the Lumia Software Recovery Tool instead. Then click "My Device isn't Responding or doesn't start up" button. Follow the instructions, and it should work. Make sure to run Lumia Software Recovery Tool as an administrator.

Download Lumia Software Recovery Tool: http://go.microsoft.com/fwlink/?LinkID=525568


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Views: 86,440 Last updated: May 24, 2018 Applies to: