The display remains black during calls and cannot be operated

[msees]

Display bleibt beim telefonieren schwarz und lässt sich nicht bedienen. Man kann nicht auflegen oder beim telefonieren auswählen.

The display remains black during calls and cannot be operated. You can not hang up or choose when calling.

gt

[Jonas]

Hi @msees, sorry to hear about this.

Your question has been translated to English as this is an International forum, please post any replies in English and it will be easier for me and other users to assist you.

Is this something you have started to experience lately or has it been going on for a while? There is a sensor at the top of the device called proximity sensor that will turn the screen off when the sensor is covered during a call and turn the screen on when you take it down from your ear during the call.

If this sensor is covered by for example, a case or screen protector you will experience that you can't turn the screen on during a call. On the link below you can see where this sensor is placed on your device (number 5). Make sure that it's not covered or that is any dirt on the sensor.

https://support.sonymobile.com/global-en/xperia10/userguide/overview/

Let me know if that helps!