Insider Release Preview gets build Windows 10 Mobile 10586.338
Microsoft rolls out a new cumulative update to the Release Preview Ring
Cumulative update 10586.338 is now available for users on the most stable Insider ring – the Release Preview. Windows 10 Mobile 10586.338 doesn’t include any new features and visible changes, but it contains a number of improvements and fixes over the previous release.
To update your device to 10586.338 you need to select the Release Preview from the Windows Insider app and then go to Settings -> Updates.
Microsoft is expected to roll out the official monthly cumulative update for Windows 10 Mobile to the general public next week and it could be the build released today or a newer compilation. A few days ago, build number 10586.416 leaked onto the Internet, suggesting it could be released to Insiders or Production devices soon.