The Google Pixel 2 XL has plenty of display issues that you're probably tired of hearing about, but don't worry; this time, it's the smaller Pixel 2 that has a funky issue for some users.
The screen is fine, fortunately, but some Pixel 2 customers are reporting a high pitched frequency or clicking noise coming from their device. It happens when the device is on and unlocked, and can be heard when you put the phone up to your ear like you're making a phone call.
Okay, so this one's not as major as a screen manufacturing defect, but it's still a lame quality control issue. It's apparently pretty easy to reproduce if you have an affected unit, and Google has acknowledged that it's a problem. They're working on rolling out a fix that should come in a software update soon.
In the meantime, apparently NFC is the culprit. If the clicking bothers you, you can turn your NFC off on the device to temporarily fix it. Obviously this breaks Android Pay and things that use NFC, so you'll have to decide if it's a worthwhile trade-off.
source: Google
