That said, here comes another issue. From the last week or more than, most of Pixel 2 XL users are complaining about an issue which causes faint clicking/buzzing noise during phone calls.
However, turning off the NFC temporarily fixes the problem, but that's annoying.
Finally, a Googler posted in the product forum that the Buzzing Sound fix would be rolling out to the affected Pixel 2/ Pixel 2 XL users in the coming weeks.
We're rolling out a software update in the coming weeks which eliminates a faint buzzing sound on some Pixel 2 devices when the phone is placed to your ear during a phone call.