We reported via our sources that Microsoft is going to sign-off Windows 10 Mobile RTM build that may be Build 10586 very soon, in fact as early as next week.
Now Internal Testers in China have also confirmed that Windows 10 Mobile Build 10586 is the release build. While they mention
Some interesting tidbits about Windows 10 Mobile RTM (Public Release too) dates and the probable Public Release build number. As per our sources, Microsoft is going to sign-off Windows 10 Mobile RTM build very soon. It may be signed off as early as next week and the RTM build number