This article is for Xperia® 1 calling issues after a software update.
You might experience an error message when trying to make a call.
This issue has already been solved.
Please update your Xperia software to the latest version.
Tips: How to check the latest software.
Find and tap [Settings] → [System] → [Advanced] → Software update.
If the following comment is displayed, Your device already has the latest available system updates; it is the latest software