I have 2 dust particles trapped under the screen but I am able to tolerate that as they are not that visible but then I had to come across this yellow color problem thing on the internet and found out that I have the similar problem too. I already exchanged once due to a somewhat big bad pixel in the center of the screen, the guy at the Phoenix Biltmore store almost didn't want to exchange it for me due to it has a single bad one only but he did eventually. I am just scare that exchange for the second time could result in some other problems again.
I met this guy at the Scottsdale mall, which he told me he exchanged his phone 4 times lol and is going to do it again.