Here’s Why Your Windows Phone Might Not Be Able To Run Windows 10 — Yet

Windows 10 is out for Windows Phone devices. That’s wrong. Windows 10 is out in preview for Windows Phone devices. Wait, that’s wrong, too. One more try. Windows 10 is out in preview for a subset of Windows Phone devices that currently run Windows 8.1. There we go.
If you have a Lumia 630, 635, 636, 638, 730 or 830, and are running Windows 8.1, you can get the new code from Microsoft. If you, like me, are sitting with a charged Lumia 9xx device, you are probably wondering what you did wrong.

Microsoft promises that it will support more phone models with “each new build” of the code, so your time in the cold might be short. That said, Microsoft cites two technical reasons why the first crop of support phone SKUs is so constrained .

The enthusiast community will likely whine some at the exclusions, but provided that Microsoft can quickly roll out updates to the code and bring more devices into the fold, the whining should be short-lived.
Now the game is afoot: Microsoft is betting the soul of its principle platform on the idea that it can build a single operating system for devices of all sorts, screens of all sizes, and inputs of any variety. What you can’t say is that the vision is small.

 

 

 

 

                                                                                                                          
#source http://techcrunch.com/2015/02/12/heres-why-your-windows-phone-might-not-be-able-to-run-windows-10-yet/