Feeling worn out by low quality phone calls? If so, you can use FaceTime Audio on Apple devices to have a much higher quality sound. Here is how.

Why FaceTime Audio?

It’s easy to think that FaceTime is exclusive to video chat, but it also supports audio calls, similar to a regular phone call. The camera stays off during the FaceTime audio call. FaceTime Audio makes the call over the internet, allowing for higher quality phone calls. The only requirement to use this is that both parties need to own an Apple device that supports FaceTime Audio.

FaceTime Audio on iPhone/iPad. 

To make a FaceTime Audio call, please ensure that this has been enabled on your device. This is usually on by default, however you can review by opening settings > tap FaceTime > check and confirm button is set to on. 

As for making the FaceTime Audio call, open FaceTime app > tap on the + icon, located in the upper right hand corner.  Once you have entered a contact, tap on Audio. this will start the FaceTime audio call.

You can also access FaceTime audio through the contacts app, or the Contacts section within the phone app. To do this, tap the person in the list > tap on the blue phone icon to start a FaceTime audio call. 

FaceTime Audio call through MacBook.

You can also use FaceTime audio on your MacBook. To do this open the FaceTime app > search for person in the box called “enter a name, email or number”. To start the call, tap on Audio.

Source and further reading:

https://www.howtogeek.com/710099/how-to-make-a-facetime-audio-call/