Microsoft delays Windows 10 Mobile upgrade for older Lumias
 

If you've been itching to try Windows 10 Mobile on your Windows Phone 8.1 device, we've got some bad news. Microsoft says older Lumias won't be upgraded until "early 2016," which is a slight delay from the "December" timeline it had offered before. F...

http://www.engadget.com/2015/12/18/m...-mobile-delay/