Lumia users there is some happy news for you. There are some rumours which say thatWindows 10 Mobile update for Windows Phone 8.1 devices was due today. But unfortunately it is not released yet. But Swiss carrier Swisscom has delivered another date for our calendar.
At Facebook they replied to a user that " The rollout for all devices in the market to update to Windows 10 update is starting on the 19.1. Greetings, Swisscom " But we cant assure Lumia users that this will be a clear update with no bugs.
Source > WMPoweruser