1. Tuan Lap Tran's Avatar
    I have updated my Lumia 620 to Windows 10 Technical Preview but now I want to back to Windows Phone 8.1.1.
    So, I used the Windows Phone Recovery Tool 1.1.0 but after downloading the software package it always says that the installation process is failed.
    Then I tried to downgrade with the Lumia Recovery Tool 5.0.7, but there I always get the error code 0x80131500.

    How can I solve this problem or is there another way to downgrade?
    04-11-2015 04:29 PM
  2. manus31's Avatar
    I got this problem when I tried to downgrade the first time around with windows 10.There's a bunch of tutorials and YouTube videos about resolving the error,but none of them worked for me.

    It drove me mad until eventually I had to use my brothers laptop where the tool installed no problem.His laptop runs win7,while mine is 8.1 pro.

    Seems to be a problem with the compatibility of the tool on windows 8,but I cant figure it out.

    try it on another machine
    Tuan Lap Tran likes this.
    04-11-2015 04:47 PM
  3. Tuan Lap Tran's Avatar
    which tool do you mean?
    04-11-2015 04:54 PM
  4. Ma Rio's Avatar
    That could be it. Possibly bad drivers or something like that.
    I just restored my L1520 to 8.1 today using LSRT. No problems at all.
    Tuan Lap Tran likes this.
    04-11-2015 04:54 PM
  5. Tuan Lap Tran's Avatar
    okay, I'll give it a try
    04-11-2015 04:58 PM
  6. manus31's Avatar
    which tool do you mean?
    The tool iI had problems with was the one they recommended.Think it was the windows phone recovery tool.Always failed to install.cant remember the error
    04-11-2015 05:29 PM
  7. Tuan Lap Tran's Avatar
    The tool iI had problems with was the one they recommended.Think it was the windows phone recovery tool.Always failed to install.cant remember the error
    I changed the laptop and yes it worked. Thanks for your help!
    manus31 likes this.
    04-11-2015 06:06 PM
  8. avi_920's Avatar
    That could be it. Possibly bad drivers or something like that.
    I just restored my L1520 to 8.1 today using LSRT. No problems at all.
    Will there be any data loss when using LSRT to revert back?
    04-11-2015 06:16 PM
  9. Diego Ceccacci's Avatar
    Your 620 went directly to 10 or passed by gdr2? I wany gdr2 if possible
    04-11-2015 06:18 PM
  10. VetDuarte's Avatar
    Will there be any data loss when using LSRT to revert back?
    Yes.
    Photos, music, pretty much all your media will be lost.
    Back up first.

    Enviado via Note 4
    04-11-2015 06:25 PM
  11. Tuan Lap Tran's Avatar
    Your 620 went directly to 10 or passed by gdr2? I wany gdr2 if possible
    I originally wanted to try out if get gdr2 but no, it went directly to windows 10
    04-12-2015 06:21 AM
  12. Francois Tetu's Avatar
    I have the same problem with the lumia 928. It goes only to one drive for the back up and pickup windows phone 10 preview again. Anything else is an error message. It is impossible to go back to 8.1. Can't format the phone and reinstall 8.1. My phone has been usurped.
    05-22-2015 03:16 AM
  13. floopydoodle's Avatar
    Microsoft has released a new version of the Windows Phone Recovery Tool today. It fixed my stone cold, bricked Lumia 925 (did not respond to keypresses nor would it charge). Maybe it will work for you.
    05-22-2015 05:29 PM

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