Recently Microsoft released Windows 10 Mobile Build 10586.29 to Windows Insiders on Fast ring. Windows 10 Mobile build 10586.29 is a first cumulative update for RTM Build 10586 and takes care of feedback received from Windows Insiders about the Build 10586.11. The latest build doesn’t contain any new features, but the build comes with few fixes and improvements.
Microsoft is soon expected to roll out Windows 10 Mobile update to Windows Phone 8.1 later this month, however Vodafone Australia already begun testing Windows 10 update on Lumia 630, Lumia 640 and Lumia 730 for public. It is worth to note that Vodafone is has also scheduled the testing of Windows 10 Mobile update on Lumia 640 XL and Lumia 930.
Source: Vodafone
Thanks Vicky for the Tip !!