First we heard rumors that the HD2 would be upgradeable to Windows Phone 7, there was even a picture of it (which was determined to be fake). Now we’re hearing that it is not possible to upgrade it because it lacks the three button requirement for WP7. Its not that it lacks the three buttons, it actually has five buttons. They’re also saying it lacks other hardware requirements, but haven’t said what those requirements actually are. They should release some of the hardware requirements later this month at MIX10 Developer’s Conference, so hopefully we’ll have a definite answer by then.
In the mean time, you can always sign the online petition we talked about here.
In other news, Microsoft has confirmed that Windows Mobile 6.5 will be called Windows Phone Starter Edition, so even though Windows Phone 7 is coming out, development shouldn’t stop on WM6.5
Source: APCMag