Question about Motorola Edge 50 Neo

My supplier claims that it is not VoLTE compatible, what can I do?

Yes, the device supports VoLTE and you can use it to make calls even after 3G has been switched off. VoLTE enables voice calls via the 4G/LTE network so that you are not dependent on 3G. You can activate VoLTE in the settings under Network and Internet > SIM and mobile network.