Microsoft has blatantly started blocking Windows 10 upgrade for Windows Phone 8.1 users as per the reports that are coming in from multiple inputs.If you are carrying around a Windows Phone device which is running on Windows Phone 8.1 OS, and was eligible for the upgrade to Windows 10 during the initial launch, you may not be able to do it right now.

Oct 16, 2019 Windows phone 8.1 to 10 update any chance - Microsoft May 20, 2020 Windows Phone 8.1 - Free downloads and reviews - CNET

Windows Phone 8.1 for Windows - Free downloads and reviews

How to Install Android Apps on Windows Phone (Windows 10 May 08, 2020 Windows 8.1 Update – important refinements to the Windows

Windows Phone 8.1 Review | Windows Central

Apr 14, 2014 How to continue using Facebook on Windows Phone 8.1 in Jun 15, 2018 Microsoft Windows 8.1 - Full Version Windows 8.1 is great, the only things that needs improving are the access shortcuts for the start menus, they need to be made more accessible to ease navigation. Judging by the previews of the soon to be released Microsoft Windows 10 that is offered as a free upgrade to current Windows 8.1 users, the integrated design of the tiles in the return How to Install Android Apps on Windows Phone (Windows 10 May 08, 2020