Since updating to android 9 all my calls had a noise issue.
It worked ok on headphones or wattsup calls.
After the agoni of searching for headset every time I received a call and watchind all the posts for this issue, I've found in another posts a hint: carrier services from google.
So I searched what it does and decided to remove all permission for carrier services.
So far I've made 10 calls and all looks good