According to the latest information released by the Windows Phone team, Windows Phone 7.5 Mango is now available to 100 percent of eligible devices, although there seem to be just a few devices left which are waiting for the update.
According to a recent blog post, the Samsung Omnia 7 on Telefonica is still in testing, as is the Dell Venue Pro on AT&T and the Samsung Focus 1.4 on AT&T, so we guess that just three devices left out of all the Windows Phone devices is pretty good.
You can find out more information about the Windows Phone 7.5 Mango update over at the Windows Phone Blog.
Source Win Rumors