iPhone Hardware

iPhone X and XS make weird Coil Whine noise when put near your ear

Hello there.

Has anyone ever put their iPhones next to their ears just to discover or hear a weird “coil whine” noise when the phone is idling? I have an iPhone X and a XS

The sound gets a bit louder when the phone seems to be power hungry ( backlight on or when rebooting).

suppose this comes from the power management chip or something?

I have even heard it clicking at times.

Can anyone explain and shed some light as it’s the first time I hear something like that and definitely never heard it on other phone brands.

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