The operating system giant Microsoft releasing build 12400 of the Windows Phone 8.1 OS preview fo the Windows 8 Smartphones. It is a new release of the Preview for Developers and Windows Phone 8.1. Starting at 1 PM ET, those who are enrolled in the free Preview for Developers program are receiving build 12400 of the OS, which is a small jump from the previous version 12397.
Windows Phone 8.1 Preview picks up third update. The first update for those with Windows Phone 8.1 came in the mid-May when Operating System version 8.10.12382.878 is starting rolled out. That first update was to fix battery life and squash bugs. The second update came just ten days ago. And after that 12397 build version is comes out for the Windows Phone devices. This update bring some changes such as “enables some newly commercialized devices and tweaks a couple of APIs”. So you most likely won’t notice any changes to your phone. Now the Microsoft has released the build 12400 of the Windows Phone 8.1 OS preview.
This update is only 21 MB in size so you dont get any dramtical changes in your Windows Smartphone. Many part of the world now the cyan update is start rolloing by which the the Windows Phone 8 device upgraded to Windows Phone 8.1 OS which brings many changes and new features to their customer such as background image change option, Cortona, six small tiles are comes in row of Strat screen and many more features.