Hi All,
let me share my experience with this problem and its solution ( for me ).
Bought iPhone 8 A1905 4 days ago, all seemed fine with IOS 11.1.1
I updated to 11.1.2 and then the problems started - same as all of you are mentioning - ( and got a bit upset ).
I investigated a bit to isolate the problem and:
- Voice memos are fine
- Video recording audio is fine
- Whatsapp audio messages are fine
- Bluetooth audio in the car is ok
- Call with earphones are ok
The problem occurs only when calling on a "standard" phone call. Looks like the software mixes up the inputs from the 3 different microphones.
I was ready to downgrade to 11.1.1 but before doing that I tried some workarounds:
- Performed a full restore with iTunes (IOS 11.1.2)
- Turned off noise cancellation
- LTE - data only
- Soft reset
the problem seems to be disappeared ( for now ). This is not a real solution to the problem, but I will keep noise cancellation off until Apple solves this with an update.
Hope this will help someone.
Cheers