The big day has finally come, as rumored mere hours ago. It's not a development version anymore, it's not a beta, it's not a test rollout, it's not meant for Windows Insiders only, it's the real deal. Microsoft has just announced the start of the rollout of Windows 10 Mobile to older smartphones that are currently on Windows Phone 8.1. Needless to say, this has been many months in the making, and from this point on updates should be hitting phones left and right. The update is headed to these smartphones, though each one may get it on a different date (and where Microsoft/Nokia isn't the...
Source: http://www.gsmarena.com/microsoft_officially_starts_windows_10_mobile_rollout_for_older_devices-news-17284.php