Published on February 15th, 2015 📆 | 2018 Views ⚑


Registry Hack allows Windows 10 for Phones to run on nearly all WP8.1 handsets
As Windows 10 Technical Preview released by Microsoft is gaining steady and slow acceptance by Windows 7 and Windows 8.1 users including smartphone user, Microsoft had recently said that Windows 10 Technical preview can only be run on select smartphones running on Windows 8.1.

Well some tech geeks at XDA Forums dont think so!.  XDA forum member RustyGrom has released a registry hack for Windows 8.1 users which can bypass the system settings and install Windows 10 technical preview without a hitch.  RustyGrom’s method implies that you install the WP10 for Phones TP even on those handsets that are not being offered any preview builds yet.

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However he has warned that, “This is only confirmed working for the AT&T Lumia 1520 and may work as is for other phones but also might require tweaks to the XML. It is very possible to brick your phone with this. Your mileage may vary!”

If you are interested in installing Windows 10 on your Windows 8.1 powered smartphone, you can try out the method given below.

According to this post on XDA-Developers, users keen on trying out Windows 10 for Phones on their Windows Phone 8.1 handsets would be required to follow a series of steps including resetting your phone, installing Windows insider app, configuring proxy settings on phone, hacking the registry, check for updates and then install the Windows 10 for phones technical preview build.

The steps are listed below as is from the XDA-Developers post:

  1. For the Lumia 1520 (and other phones?) reset your phone using the Windows Phone recovery tool. I recommend not logging in and setting everything up yet and just waiting til the end and doing a reset and letting it restore after you’re on Windows 10. This may not be required for your device but most likely is due to the space issue cited by Microsoft. You can see your available space in the About menu of the Windows Insiders app. Before resetting mine was ~200mb and after it was ~600mb. You can try without resetting but may get an error after it tries to download and install the update.
  2. Install the Windows Insider app on your phone (you will need to have a store account configured)
  3. Open the insiders app and go to the about options in the app bar and screenshot/make notes/email the settings to yourself. You may need this later.
  4. Download and extract the WPInsidersHacks app (found here at XDA-Developers) to your computer
  5. Start the WPInsiderHacks app on pc, approve any firewall requests
  6. Connect to the same WiFi that your PC is on. Edit the settings for the WiFi connection to turn on the Proxy and set it to use the PC’s IP address and enter 8877 for the port
  7. Open Internet Explorer on your phone and navigate to https://[pc.ip.add.ress]:8877 where [pc.ip.add.ress] is the IP address of the PC running the WPInsidersHacks app
  8. Tap on the link at the bottom to the fiddler root certificate
  9. When prompted click open and then install to trust the cert and ok at the confirmation
  10. Run the Windows Insider app and tap get preview builds
  11. Tap on which custom action you’d like to perform e.g. “Set to ATT Lumia 635? and click the arrow at the bottom.
  12. Accept the agreement and click the check mark at the bottom. the app will close
  13. Now clear your proxy settings and run the insider app again
  14. Tap get preview builds and login with your Microsoft account
  15. Select the fast branch (if you’re reading this of course you want the fast branch) and click the arrow at the bottom
  16. Go into the phone settings and check for updates. With any luck you should have Windows 10 there for you to install.
  17. You’ll probably want to go into the settings and do another reset and then log into the phone and let it restore your previous data

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we would like to warn you that only those users who are comfortable with fiddling around with system files may use the above tutorial.  Any misstep may result in a void warranty as well as a bricked smartphone. On its part, Microsoft has already warned against installing unauthorised builds of Windows 10 Mobile on Windows powered phone.

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