Last we reported about a leaked screenshot and some info related to Windows 10 Mobile Build 10586.122, the next cumulative update to RTM Build 10586, that Microsoft may push soon to Insiders on Build 10586.107. Now this build has appeared in Microsoft’ update catalogue as Windows 10 Mobile Production Bundle. So, it seems to confirm that Microsoft may push it soon to Insiders. The software package seems to be 705.8 MB in size.