1. Vivek R's Avatar
    In order to roll back from windows 10 TP to Windows Phone 8.1.1.
    1. Use Windows Phone recovery tool.
    2. identify your phone,
    3. software will search in internet for any respective phone updates.
    4. Then hit reinstall(rollsback to 8.1.1)
    windows-recovery.png

    5.From gabe

    02-17-2015 03:10 PM
  2. iop777's Avatar
    Does this put your RM number back to normal? I have a Lumia 1020 but the model is showed as RM-1027 which is the Lumia 635 I believe.
    02-17-2015 03:27 PM
  3. Alain_A's Avatar
    Does this put your RM number back to normal? I have a Lumia 1020 but the model is showed as RM-1027 which is the Lumia 635 I believe.
    yes it will...you'll have to re-do the preview for developer to get back to 8.1.
    02-17-2015 04:12 PM
  4. Vivek R's Avatar
    Yes. It'll revert back to original RM number. since it cleans and reinstalls entire OS. It seems like Windows 10 For phones TP installs like in-place upgrade over 8.1.1 that's why you don't see that many apps installing when you are done with Windows 10 for phone TP, which normally happens when you upgrade ur OS.

    Also it's advisable to have denim firmware before upgrading to Windows 10 since there are reports that it works better with Denim than with Cyan, Black.
    02-18-2015 12:30 AM

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