However, if you still really want to upgrade your Windows Phone 8.1 handset to the latest Redstone preview builds, you can unlock your phone and replace a few registry keys to pretend your phone is a supported model giving unrestricted access to download and install the latest releases of Windows 10 Mobile. In this guide, which was originally posted on the XDA Developers forums, will help you with the instructions to enable your unsupported Windows Phone 8.1 handset to Windows 10 Mobile Insider Preview.
Install Windows 10 Mobile on unsupported Windows Phone 8.1 handset
The instructions on this guide should work to most unsupported Windows Phone 8.1 handsets to upgrade to any Windows 10 Mobile Insider Preview builds — including build 14322. However, I would highly encourage you to visit the XDA Developers forum and carefully read all the instructions, risks, and comments from other users that may have tried these steps before proceeding, because it’s not guarantee that will work for everyone equally. In addition, there has been reports from users complaining bootloop problems installing Windows 10 Mobile build 14322, and the forum entry also warns of different bugs that you may come across installing Windows 10 Mobile on your unsupported phone. Source XDA Developers All content on this site is provided with no warranties, express or implied. Use any information at your own risk. Always backup of your device and files before making any changes. Privacy policy info.