Sony has started rolling out a new update to the Xperia X units that are part of the Japanese company's Concept for Android program. The update arrives as version 38.3.A.0.107 and brings along Android security fixes for the month of February.
The update brings along changes related to the modem software as well as some stability improvements. It is currently available on the Experimental track of the Concept firmware - it should be live on the Stable track sometime next week.
This new update comes shortly after version 38.3.A.0.94 started rolling late last week. That update brought along several changes, including ambient display.