If your phone was properly unlocked the Windows Phone 8.1 preview update will be waiting for you. Buy a new phone A safer route would be to purchase one of Nokia's three new smartphones: the Lumia
Oct 23, 2017 Windows phone 8.1 to 10 update any chance - Microsoft May 20, 2020 Windows Phone 8.1 now available to download - The Verge Apr 14, 2014
Windows Phone 8.1 is now available for download for free on your Lumia 520 | Lumia 520 Windows Phone 8.1 Update | Download Windows Phone 8.1 for my Lumia 520. Great stuff comes in big packages! Before you start updating your Lumia 520, we would recomment that you make enough space on your Lumia 520. Make sure you have up to 1.5GB free phone
Windows Phone 8.1 - Free downloads and reviews - CNET
windows phone 8.1 free download - Windows 8.1, WP tiles 8.1, Windows 8.1 Professional, and many more programs
How to Update Windows Phone to Latest Software Version Aug 09, 2019 Download Over-the-cable Updater 8.1.0.0 - softpedia Download Over-the-cable Updater - Get the latest available bug fixes and security updates for your Windows 10 Mobile or Windows Phone 8.1 device with the help of this lightweight tool How and when to upgrade to Windows Phone 8.1 - CNET