I have the same problem and
I think I fixed it with dissabling Dolby Atmos!!!
Can you please check if the Dolby setting makes any difference on your phone?
Do you still have the echo problem?
Did Samsung coming back with any solution?
Hi, I am facing the same issue over WhatsApp calling, bought last month Note 20 Ultra in Feb 2021. They Give me a code to check your Mics *#0283# there are three mics and I check them all. All working fine .. Then I start making calls in a Safe Mode ..everything is fine ..but on WhatsApp calling my voice Echo sometimes the receiver cant hear me .. 😞 ..
My watsapp call kept disconnecting. Very frustrating with this phone. Samsung service centre checking phone is working well but why my watsapp call still experiencing issues