Hi there- since today I haven’t been able to hear people when I call and likewise when they call me? I don’t think there’s anything wrong with the phone as WhatsApp works for calling and I am wondering is it the 48 network carrier is down?
Network is fine. Anyway if it was down you wouldn't even be able to make or receive calls! Can the person at the other end hear you? Sounds to me like an issue at your end even if WhatsApp calls work ok. Can you try another SIM in your phone just to see if calls work then? Maybe contact 48 support in case they can help? See the link in my signature below.