There are multiple rumors floating about the Windows Phone Blue operating system, which is likely to replace Windows Phone 8 operating system. However, many believe that Windows Phone 9 will be replacing the present Windows Phone 8 OS. However, there is no release date on either yet.

The new Windows version is being temporarily called Windows 9. Codenamed Threshold, it potentially refers to branching out from being dependent on desktop to explore a new arena where the Start Screen remains the key aspect of using Windows.

A statement made by an associate at Microsoft indicated that their engineers are involved with PhoneTest Services team of Windows and are trying the new OS currently for Qualcomm, HTC as well as Nokia devices. The test engineer’s LinkenIn profile states that she is working as a test engineer in Microsoft Corporation’s mobile team. One can easily arrive at the conclusion that it is not Windows Blue but Windows Phone 9 which will be launched as the successor for Windows Phone 8 OS.

In recent times, Microsoft has been making continuous efforts in the mobile domain. Needless to say, Windows Mobile OS is a strong competitor to most other OS makers in the market today. However, Microsoft felt compelled to act in a bid to strengthen its position by bringing in a new series of trends and innovations with its mobile platform OS so as to emerge as a formidable player in the high-growing mobile segment. Thus, it is only likely that the computer giant will be releasing the latest mobile OS version in a few months from now.