I have literally never had a problem like that. I occasionally have someone say, “excuse me, i just missed a couple words”, and i apologise, face the phone, and say it again.
For me, having the phone call be 15 second longer and be physically comfortable is better than being 15 seconds shorter but uncomfortable. Oh realize i am prioritizing my comfort over your time, but it’s not a large imposition, with my phone that has good sound quality.
And if i have to use my cellphone there is literally nothing i can do to give you good sound quality. (Other than asking you to call back on my landline, if I’m at home.) And many people only have a cellphone, and have no other phone service available to them.