The feat was performed by French engineering student Gustave Monce, who also posted a video of his effort on YouTube. According to Monce, he says that he managed to get an ARM64 build of Windows 11 running on the old Windows phone after “a day of work” and the results are, in a word, fascinating. As a quick primer, the Lumia 950 XL was launched back in 2015, which was pretty much the twilight years of Microsoft’s Windows Mobile OS for smartphones. Specs-wise, the phone ran on a Snapdragon 810, 3GB RAM, 32GB of expandable storage, and had a 5.7-inch WQHD display. Naturally, it goes without saying that Windows 11 was never made to be backwards compatible with the last of Microsoft’s Windows mobile devices. Having said that, the video shows the device being able to orient from portrait to landscape mode, albeit not seamlessly. What is even more impressive is that Monce also managed to make the device capable of making and receiving phone calls. Why is this impressive? Because Windows 11 doesn’t ship with a phone stack, which means Monce actually had to create that part of the stack from scratch.

— Gustave Monce (@gus33000) June 29, 2021 At the end of the day, it’s clear that Monce’s efforts are really just for fun, and there is no denying that it is quite refreshing to see what is an already ancient device – in technological terms, that is – capable of running Microsoft’s OS replacement for Windows 10. (Source: ONMSFT, The Verge, Windows Central // Image: The Verge)