This whole yellowgate is absolutely BS and completely unacceptable from Apple. I have been going through a lot BS because of this issue. I bought one IPhone 4s (black 16 gb) at launch day and it has been fine since the minute I took it out of the box. A week later I got another Iphone 4s (same exact model, black 16 gb) and it had a horrible yellow tint since day one. I waited 14 days to test the BS glue theory, but as I expected it was the same ugly screen. So I had that replaced with another Iphone 4s (same black 16 gb) and it had the same exact yellow tint, so I didn't even take it home. Returned it at the spot.
So finally after paying multiple activation fees, I was fed up and comprised by buying a white Iphone 4s (also 16 gb) and again it had a yellow tint. Although I must admit the yellow tint on the white wasn't as bad as it was on the previous two black 4s. Nonetheless, it was unacceptable since I had a perfect Iphone 4s from launch day to compare it with so I returned that one as well.
I'm pretty sure I know what is going on here after this long debacle. Apple is using different manufacturers for their screen. Some of the screen are perfect and has the normal "blue" tint. While other manfacturers has a different yellow tinted screen. The first batch of phones (launch day) probably used the same great manufacturer, which is why my iphone 4s and others who got them at launch day have the normal screen. And after that Apple started to use a POS manufacturer for its screen, which is why my last 3 iphone 4s all had the yellow tint.
This is completely unacceptable for Apple to comprise on its quality. I probably wasted several days and a lot money for all those activation fees because of this BS from Apple.I have several other Apple products and I have never had a single issue before so I'm very dissappointed to say the least.