Microsoft officially released the first update version of Windows Phone 8.1 system Update1, Windows Phone 8.1 developer preview version can be upgraded to the latest version Update1. Now, the users of the developer preview version can check the update on Windows Phone 8.1 , access the download and update service immediately, other devices will be updated in the coming months.

Although it is technically only for developers, however, any Windows Phone user can register and install this update through the Microsoft App Studio program. If you are a program participants of Microsoft App Studio, then you can become a Windows Phone developer without paying the fee of $ 19, while access to update Windows Phone 8.1.

Head of Microsoft’s Windows Phone Joe Belfiore has recently said on Twitter that, Windows Phone8.1 Update1 will be automatically pushed to the developers’ phone which was installed preview version, which eliminates the trouble of re-boot.

Windows Phone 8.1 Update1 contains a lot of interesting changes and useful features, such as the function which magnetic stickers can be combined into a single grouping. In addition, what attract the most attention must be the Cortana voice assistant, and Microsoft will provide a wealth of convenient services to users through this voice assistant.

One thing worth noting is that once you upgrade the system,it will be unable to return to the previous version, and the warranty also will be invalid until the phone can normally use the latest version of Windows Phone 8.1.