Microsoft released its latest Windows 10 Mobile preview build on Nov. 18, and users who are on both fast and slow ring of Windows Insiders can now avail of the update. It carries the build number 10586 and is said to be the RTM version of the Windows 10 Mobile OS.

According to Venture Beat, the Windows 10 Mobile 10586 build does not bring new features to its users. However, the build has been streamlined to deliver better user experience as it contains various reliability fixes. Users who wish to install the update are recommended to back up their devices first.

The 10586 Preview Build carries fix for garbled Start screen after installing the 10581 build. It also allows users to set default locations by navigating to Settings > System > Storage. The time delay for resuming and loading screens while switching among apps has been fixed. Moving apps to microSD storage will not result in crashing of apps.

Microsoft had launched the Windows 10 operating system for PC users on July 29. However, the Redmond giant is yet to release Windows 10 Mobile officially. It is expected to release the final build in December.

The Lumia 950 and the Lumia 950 XL flagship smartphones that were released recently in the U.S. already come preinstalled with Windows 10 Mobile. The new OS is also available on the newly announced Lumia 550 budget phone.

According to the official Microsoft Lumia page on Facebook, the Windows 10 Mobile is scheduled to come out next month for other Lumia series phones from the company. Poland will be one of the first countries to receive the Windows 10 Mobile roll out in December.

Orange, a carrier from Poland has revealed that Lumia 630, Lumia 635, Lumia 640, Lumia 735 and Lumia 830 will be the first set of devices to get Windows 10 Mobile starting Dec. 14. The second batch of handsets -- Lumia 532, Lumia 625, Lumia 720, Lumia 925, Lumia 930, Lumia 1020 and Lumia 1030 -- are scheduled to receive the update by Feb. 1 next year, Tech Times reported.

Only those Lumia handsets that have Lumia Denim build and 8 GB of internal storage are eligible to receive Windows 10 Mobile build. One should also be aware of the fact that all the handsets will not be able to support all the features of Windows 10 Mobile, The Verge reported.