Microsoft has been testing a new update for Windows 10 Mobile Version 1511 for a little while now. The company has been internally testing Build 10586.218, which will be available as a cumulative update to Windows Insiders in the Release Preview Ring sometime very soon. Now, the user-downloadable content for build 10586.218 is already up on Microsoft’s update site, which suggests the company could be pushing it to Insiders as early as Monday.
It is worth noting that this build will be coming to users who own a device that shipped with Windows 10 Mobile once Microsoft believes it is ideal for the public. If you own a Lumia 950/XL, Nuans Neo, Acer Jade Primo or any other device that ships with Windows 10 Mobile as well as devices which have the official update, you will get it as a cumulative update in the coming weeks — but the update availability may vary depending on your carrier. (Update: this may not be the case as some users seem to have received the cumulative updates for the OS in other Lumias like the Lumia 830 — however, I am yet to receive any cumulative update for my Lumia 435).
As for the new features in build 10586.218, we can confirm there are no new features — as expected. However, Microsoft has fixed the overlay bug in the All Apps list. which was quite annoying and thankfully, Microsoft finally fixed it.