When iPhone xr calls, the ringtone disappears. Why is that?

When iPhone xr calls, I hear a ringtone at first

It's getting smaller and then disappearing. Why is this happening?

If it doesn't work, I'll say the speaker is broken, but it's not that the ringtone isn't working.

1699 2018-11-07 Gentleman

It's a feature that's added to the iPhone
If you look at it, the sound becomes smaller

Gentleman 6 years ago 0

He knew he was getting a call, so he made it smaller

Gentleman 6 years ago 0

Oh! That's an interesting functionThank you

Gentleman 6 years ago 0

It's a function called "Face ID"
https://m.blog.naver.com/jungchan5929/221190561829
If you look at this, it comes out well

Gentleman 6 years ago 0

You can turn off the function

Gentleman 6 years ago 0

The downside is that it gets smaller even if I don't look at itLOL

Gentleman 6 years ago 0