Skip this method and read the second method (you will find it at bottom of this article, below 512MB RAM tutorial). ( Learn how to sideload apps to your phone).
To install the Fall Creators Update on unsupported phones, you need to fool Microsoft systems and make them believe that your unsupported phone is actually the Lumia 950 XL, a supported Windows Phone. Unlike old days, you are not supposed to manually edit the registry to install the updates, the XDA Developers have created a new app that lets you install the Windows 10 Mobile Fall Creators Update on unsupported Lumia. Guide to install Windows 10 Mobile Fall Creators Update on any phone
We accept no responsibility for any damages that may result when unofficially upgrading the phone to the Windows 10 Mobile Fall Creators Update. However, before hacking the phone, you can try to get the update on your phone from Windows Insider’s Fast or Release Preview Ring settings. If your Windows Phone isn’t listed above, the time has come when you will need to ‘hack’ the phone and force the Fall Creators Update.
