Windows 10 Coming to All Lumias including Low End Nokia Lumia 520

[Mobile Geek]

Hey all: we ARE working on Win10 for 512MB, including 520. Our ambition is to make #Win10 available for these devices but features may vary

— joebelfiore (@joebelfiore) February 8, 2015

Also as per him, the internal testing is already going on and test build will be available internally in this month

Read More-

http://www.nokiawp.com/2015/02/nokia-lumia-520-and-other-low-end.html