Windows 10 Mobile Build 14393.479 is now under testing and it could be the next cumulative update for Windows 10 Mobile devices. Microsoft had released Build 14393.488 to Windows 10 Mobile devices and the upcoming update will fix bugs found in current build 14393.488.
However, Windows 10 Mobile Build 14393.479 will only have bug fixes and improvements. You should not expect any cool new features wit Build 14393.479 as it is a cumulative update.
Microsoft could also release a new update to Windows 10 PC Devices. Is your phone running on Insiders build or the Production?