If all goes well, Windows Insiders will be able to download a new build of Windows 10 for phone later this week. Microsoft is currently testing the build, with the version number 10080, internally among its own team members right now.
In a message on his Twitter account, Windows Insider head Gabriel Aul stated:
"10080 is the current candidate. Pushed to Microsoft ring yesterday. If it fares well, we'll have a build this week."
In a follow up message he added that it won't be launched today, saying;
" It takes a couple days to evaluate quality telemetry from Microsoft ring."
This next public version should be a big release as it will also see the debut of the universal Office apps for Windows Phone. It will also see more smartphones supported, including the Lumia Icon and the Lumia 930.
Source: Gabriel Aul (Twitter); Thanks to Dany for the tip!