I can't make a call after a software update (Xperia 1)

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