Microsoft's all-but-euthanized Windows Phone 7.5 and 8.0. Microsoft first released devices with Windows Phone 7.5 and 8.0 in 2011 and 2012, respectively. If you're on this version of the OS, it's recommended that you upgrade to a later version of Windows 10 Mobile.
"Windows Phone 7.5 and Windows Phone 8.0 have reached their end of support dates and thus services for these versions of Windows will be discontinued over time", the company wrote in a blog. To recollect, "Find my phone" is a feature that let users locate their lost phone. Microsoft still promises that phones with Windows Phone 8.1 have push notification support and Windows 10 Mobile are fully supported so if you are a diehard Windows Phone fan, you now have two options.
Hope may still spring, though: Rumor is that Microsoft is working on a new, foldable tablet device that could also function as a smartphone.
Microsoft announced in October that Windows 10 Mobile would no longer receive new feature updates. Although bug fixes related to security would still be offered for some more time. Nokia did go all-in on Windows Phone, but did so as it entered what turned out to be terminal decline.
Users of newer versions of Windows Phone software can rest easy for now however, as Microsoft said it will continue to support those versions. "But building new features aren't the focus".