Phone looses network, get it back when activating/deactivating flightmode

I use the phone with an esim from german simply/O2. From time to time (at least once a day) the phone looses the network and remains disconnected.
Activating/Deactivating the flight mode brings it back until it looses the network again.
Very annoying, I missed calls, messages have not been sent, …

Any help, explanation?

Latest updates are installed and it happened the last days over Easter quite some times.

Regards,
Andreas

Hi Andreas and welcome to the forum

Thats a known issue which can most times be resolved by disabling VoLTE and/or 5G

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