To activate VoLTE on your cat S62 Pro, proceed as follows:

1. open the settings on your smartphone.
2. navigate to "Network & Internet" or "Connections" (depending on the Android version)
3. select "Mobile network" or "Mobile networks".
4. search for the option "VoLTE" or "4G calls" and activate it by toggling the switch.

These steps allow you to make high-quality voice calls over the 4G network without interrupting your mobile data connection.

Provider sunrise/yallo: they recommend buying a new mobile as a solution ;-(

Automatic response that is of no use, this function cannot be called up (at least on my) S62 Pro.