It looks like owners of older smartphones with Windows Phone 8 or 8.1 will have to wait a bit longer to get their promised over-the-air update to Windows 10 Mobile. Microsoft has now officially confirmed that those updates won't begin until sometime in early 2016, rather than December as the company previously announced.
Here's the official statement from a Microsoft spokesperson, as posted at Thurrott:
"This November we introduced Windows 10 to phones including brand new features such as Continuum and Universal Windows Apps with the introduction of the Lumia 950 and 950 XL. The Windows 10 Mobile upgrade will begin rolling out early next year to select existing Windows 8 and 8.1 phones."
Owners of older Windows Phones will likely have more luck getting their update to Windows 10 Mobile by signing up for the Windows Insider program.