I have no idea what they are doing but it sucks. I have in many occasions found that making a call using WhatsApp works much better - both in quality and latenc

I have no idea what they are doing but it sucks. I have in many occasions found that making a call using WhatsApp works much better - both in quality and latency - than making a phone call. Phone lines are so atrociously bad, they've put me off from doing a voice call unless it's absolutely necessary.