Windows 10 Mobile build 16212 (rs iot)

Windows 10 Mobile build 16212 (rs_iot) is an internal build of Windows 10 Mobile. This build was accidentally pushed to mobile users of the Windows Insider Program on 1 June 2017, along with two other compiles from the rs_xbox and the rs_devices branches.

Bugs
This build cannot be installed. After installation, the device will get stuck in a bootloop. The only workaround is to use the Windows Device Recovery Tool and re-flash.