UPDATE 11/20: Windows 10 Mobile Insider Preview Build 10586 is now available to Windows Insiders in both Fast and Slow rings.
Microsoft has finally rolled out Windows 10 Mobile Insider Preview Build 10586 to Insiders on the Fast Ring. It is worth pointing out that this is the final build that comes pre-installed on the newly announced Lumia 950 and 950 XL.
The Windows maker has not introduced any new features with Build 10586, as its utmost priority has been bugs fixes and performance improvements. For instance, Microsoft has fixed the problem with app downloads via the Windows Store, along with a display issue for the Start experience.
In addition, issues causing oddities while moving apps from internal storage to SD Cards have also been resolved. Even app switching has also been considerably improved with the new build
“This build for mobile has a lot of good bug fixes and general improvements for you to check out. Overall this is a really great build, and we’re excited to get it out there for all of you to try,” explains Gabriel Aul.
Though, the major cause of concern with Build 10586 is the fact that it comes with the “reboot loop” issue which also affects Windows Insiders that had earlier installed Build 10581 and did a factory reset on their phones. This implies that Insiders running Windows 10 Mobile Insider Preview Build 10581 on their devices and performed a factory reset, won’t be able to install Build 10586 as their phone will go into a reboot loop.
“For those of you who did a factory reset of your phone, you most likely did not notice this issue on Build 10581. Due to this bug, however, upgrading to Build 10586 will cause your phone to go into a reboot loop after the upgrade completes – rebooting at the Windows or operator logo. To recover your phone, you can use the hardware key combination to reset your phone that will then put it at the OOBE experience on Build 10586. We highly recommend that you make sure you do a backup your phone *before* upgrading to Build 10586 due to this bug. Additionally, you can also recover your phone by using the Windows Device Recovery Tool to go back to Windows Phone 8.1 and then upgrade to Build 10586,” adds Aul.
Other known issues with Build 10586 include the inability to deploy Silverlight apps via Visual Studio onto your smartphones. Moreover, the Insider Hub cannot be used on phones upgraded to Build 10586, though both the issues will be fixed in a future build.
Hence, the initial development phase of Windows 10 Mobile is technically over and now, Microsoft has shifted its focus on the next major Windows release codenamed ‘Redstone’. And the company will start rolling out to old Lumia phones sometime in December.