While Microsoft has been offering some official details of what we can expect from the Windows 8.1 upgrade later this year, the company has so far been silent on what it has planned for the next "Blue" version of Windows Phone. Now there's evidence that Microsoft has started to test an early build of what will likely be called Windows Phone 8.1.
Windows Phone developer Tom Myles posted up an image of his analytical data from one of his apps, Archiver, on Reddit earlier today. Among the different version numbers for Windows Phone 8, there was one that stood out for what looks like Windows Phone 8.1. Specifically, the version number was 8.10.12076.0. Windows Phone 8 devices have the current build number of 8.0.1211.204.
Of course, a build number for Windows Phone 8.1 is just about all we have in terms of info about the next version of Microsoft's mobile OS. Microsoft will likely reveal a lot more about Windows Phone 8.1 as part of its BUILD 2013 developers conference, which will be held in San Fransisco in late June. While Windows 8.1 will officially launch later in 2013, there's been so such information on when Windows Phone 8.1 will be made available.