On December 8, 2015, Microsoft released Windows 10 and Windows 10 Mobile updates on a global scale testing the Windows as a Service (WaaS) model. Besides the syncing of cumulative OS updates between desktop and phone, the event revealed that carriers seem to be sidelined. Here is why that is and what changed between Windows Phone 8.1 and Windows 10 Mobile.
Essentially, Microsoft seems to have “blackboxed” the radio stack, so that it can push updates without affecting it. Very, very nice.