IPhone 6s has a dark spot on screen
Hi, good afternoon everyone. Is there anyone having a problem there is a dark spot in the screen of IPhone 6s?
It appeared suddenly while I was texting, and initially it just a small spot I thought it is a software problem and it will disappear after some time. But it is enlarging and I research online I suspect it's "LCD bleed" which the liquid in the LCD came out. I didn't drop my phone even once and it suddenly came out a dark spot. Is that under Apple responsibility? Why does this quality assurance so low as this is my first time face to this problem,I never meet this problem with all smartphones I had! Can I send to Apple service center and ask for fixing this problem without a charge?
iPhone 6s, iOS 11.4.1, Screen dark spot