Sony is now rolling out a new software update 38.3.1.A.0.96 for Xperia X Concept. The latest update includes Android April security patch.
Also, the update brings security bug fixes present in the Android OS as well as other enhancements and performance improvements.
Software update 38.3.1.A.0.96 for Xperia X Concept OTA update notification may take some time to pop up on your device. Meanwhile, you can manually check for the update by heading to your handset’s Settings menu.