Small window in glass between speaker and camera?

What is the 3rd window (hole) for on the front panel between the speaker and the camera?
This seems to be in the same place (ish) as the moto g2 notification LED.
Does the G3 have an LED here as well as the charge LED behind the speaker grill?

Small crack denied service on unrelated issue

I'm pretty disappointed. I was in Whistler about a month ago and using the phone around the pool. I didn't submerge it but it leaked and condensation got into the phone. Additionally, the phone has been exhibiting significantly poor speaker phone.

Subsequent to developing those issues, the phone got a very tiny crack in the corner from a drop. I sent the phone in for repair on the water issue and the speaker phone and the repair centre simply sent it back and denied servicing. Does anyone have any tips or ideas for getting servicing? I'm not looking to replace the display, simply the issues that are unrelated.

Thank you.

why small screen row of my lg g2 d800 not responding sometimes and responding sometim

why small screen row of my lg g2 d800 not responding sometimes and responding sometimes?
when i go into hidden settings menu and go to hardware test and then touch test and then 'check synaptics touch panel' when the 4tests pass screen works fine but sometimes 2 test pass and screen doesnt work fine. please help me out.