Sound of Voice when responding very bad and distorted

Hi, when answering a ring fom my Doorbell Pro through the Ring app on iOS, the sound of the voice is totally distorted and barely understandable. Here in this video I recorded how the voice sound on the Doorbell Pro: [Video - Ring Video Doorbell Pro - Sound Test with iOS App on iPhone XS](https://youtu.be/3o-HCwy6B4c "Video - Ring Video Doorbell Pro - Sound Test with iOS App on iPhone XS") On the other end we had an iPhone XS with the spring 2020 latest version of iOS 13.4 and the latest version of the Ring App for iOS. The sound quality is disastrous, in my view, as it is totally distorted. In reality the sound is much worse than you hear it on the youtube video I posted. In this video, we did a test on the same Doorbell, but with an Amazon Echo Show 5 on the other end: [Ring Doorbell Pro - sound test on a Echo Show 5](https://youtu.be/kJXAdH1jxvM "Ring Doorbell Pro - sound test on a Echo Show 5") Here, the sound is much improved. I still consider it of very low quality, although it can be better understood. Im both videos the language we spoke is German, but you still here how bad the quality is by just listening to me speaking in front of the Doorbell and comparing the sound that comes out of the Doorbell speaker. For me, this bad quality is really disapointing. Has anyone any suggestions on how to fix this, especially the disastrous quality from the iOS App? Kind regards,