hissing noises if recording with front camera
i got a problem with an iPhone 7 device. It makes hissing noises while recording with the front camera (partly louder than my voice).
Recording with back camera doesn’t make that noice (it’s never louder than my voice).
Also calling watching videos is not a problem (no noise).
I thought it could be the microphone on the back (Audio Control Cable ) but it didn’t help to change it.
Any other advice? Thanks in advance for your help.