Microsoft, through a tweet by Gabe Aul, has just announced that Windows 10 Mobile build 10149 is moving to the Slow Ring. This means that for those Windows Phone users adventurous enough to try out Windows 10 Mobile but haven't been on the cutting edge Fast Ring, there's a new build now available.
— Gabriel Aul (@GabeAul) July 7, 2015
You can read more about Windows 10 Mobile build 10149 on the Blogging Windows post from when the build was first released back on the 25th of June. Windows 10 Insiders are hopeful for a release candidate build as early as this week, while we're still waiting for a new mobile build. Perhaps moving 10149 to the Slow Ring is a signal that something new is on the way (fingers crossed).