Windows has proven to be Microsoft’s trump card. Just after the giant rolled out the initial build for Microsoft Windows 10 on phones, the technical Microsoft Windows 10 preview build is also set to roll out.  According to a Windows Blog, this build 10051 is part of project Spartan that is built into the OS.

Microsoft Unveils Windows 10 Preview BuildIn case you own a Lumia handset—sparing Lumia 290 and Lumia 640 XL, the preview build can be accessed without much effort. As for these two Lumia model mentioned, the hiccup standing in way of the preview build is the screen dialling issue.

However, before you get disheartened, the better news is that the preview build is in its infant stage and thus, not expected to be a high-end experience for the users at all. Insiders have warned users to avoid installing the same on their primary smartphones.

Coming to the main features that the build hints at, we have the IE 11. Microsoft has kept its promise to allow non-HTML 5 sites to open up on the browser! Perhaps this can cut down on the flak Internet Explorer has garnered up over the last years.

In addition, the preview build promises to give users access to Outlook Calendar app and a brand new Outlook Mail. The latter is touted to include responsive gesture based features. Besides these new headways, the preview build hints that the SMS and phone applications will see a huge change in terms of design interface as well. Also, the messaging window will see an instant call icon.

Before you get too excited, you need to know that nothing has been finalized and these are just experimental ideas. You may access the Preview but choose stick to the good ol’ Windows 8.1 version in case you are not happy enough to upgrade!