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.