Weird screeching sound coming from earphones when in a telephone call?

[Windows Central Question]

Only during telephone calls does a loud screeching noise come through earphones. When using the earpiece or speaker, it is completely fine.

 

[RumoredNow]

You need to eliminate one or the other source...

Do the headphones do the same when connected to another phone... Bad headphones.

Does another pair of headphones do the same thing on your phone... Bad headphone jack.