Windows Insider members on the Slow ring can now begin downloading Windows 10 Mobile build 10149 on their supported Windows Phone device. The build was previously released to Fast ring members a couple of weeks ago.
The announcement was made by Windows Insider head Gabriel Aul via his Twitter account. He didn't indicate what changes, if any, were made in this new version of the build compared to the one offered to Fast ring members. You can check out our own detailed hands-on look at build 10149.
Source: Gabriel Aul (Twitter)