Windows phone users are in for a treat after Microsoft introduced the new build of the Windows Mobile 10 operating system on Tuesday.

A blog posted on Windows.com revealed a preview of what Windows Mobile 10's Build 10136 would look like. The operating system would initially be offered to mobile devices that are currently running Windows Phone 8.1.

According to Tech Crunch, users of the previous build (10080) should use the Windows Phone Recovery Tool to reset their phones back to their original build first before they can jump to the new code due to a migration bug.

The improvements include subtle changes to the UX cover and user interface like fonts, icons and layout; some developments with Cortana based on feedbacks from Windows Insiders, enhanced camera and photo outputs and the one-handed use capability since the screens of the devices are at 5 inches and above.

However, Windows blogger Gabe Aul emphasized that users who wish to upgrade to this OS should remember to be patient when the upgraded Lock screen appears to be lagging and does not show the time and date for 10 minutes.

"Please be patient and let it sit - eventually the date and time will appear and it will allow you to unlock your phone. There is a post-upgrade migration status screen missing, which normally would show you that it was making progress," he wrote.

Aside from improvements, the update is aimed at fixing a couple of issues, such as duplicate app tiles after upgrades, PIN unlock attempt reset difficulties, Skype not working after upgrading and problems with Language packs.

Some known problems with build 10080 were also corrected through the 10136 including the MMS bug, frozen lock screen, Action Center glitches, too small font in the People app, Wi-Fi shortcut controls, Start screen background scaling, mouse cursor's unwanted appearance after pressing the back button and the crahing of the Settings app when adding detailed status display from Outlook Calendar and similar apps.

Through the blog, Aul promised Windows users to watch out for better-performing builds to come in the near future.

"The upgrade experience is something that is very important for us to get right, so you should definitely expect that we'll address the migration bug that affected this build," he stated and expressed his appreciation to "adventurous Windows Insiders" who helped improve the build by giving feedbacks about every upgrade.

Windows is expected to roll out Windows 10 to personal computers and tablets by July 29, while Windows 10 Mobile has yet to receive a specific date of release.