[Galaxy S6 General] trenzterra:
(1) Leave this thread and live your life normally. I think while this thread helps us commiserate, when someone suddenly gets a good unit, we all get our hopes raised up... only to be dashed some time later. I'm unclear those who managed to get a 'good' unit after exchanges---did they manage to get a really perfect unit, or did they get one that was liveable? I don't know.

As you said, the tint on your third screen was unnoticeable at first, then annoying, then it seemed to disappear, then when you fixate on it again it becomes irritating. Perhaps it's partly in your mind.

It would help to focus on the numerous capabilities of the phone as compared to its only (okay, probably three if you count the lens shading issue and the lack of MHL--seriously, Samsung?!) flaw. The camera is the awesomest I've ever come across on a phone. Sound quality is exceptional and I can really feel the difference on my headphones with the Wolfson DAC. Wireless charging is probably the best thing since slice bread. The battery life is exceptional for its size and for doing web browsing. My S4 would die after 2 or 3 hours of web browsing. Not with the S6. Remember that many others in this community as well as elsewhere are enjoying the S6 despite having the same flaw (I'm sure many of them have similarly flawed phones but are enjoying it on its merits instead). Look at the people engrossed with battery life discussion; posting awesome camera macro shots, etc.

When I sold my second S6, I went back to my S4, and it felt really slow, old, and cheap. That's why I decided to buy the S6 again despite me fighting against the urge to do so (remember me saying I would wait for a later batch? F uck me!)

(2) Try, try and try again. As I said, it may be a painful process, but hey if your carrier allows unlimited exchanges, why not? Beware that you might end up with a phone with a perfect tint (or lack thereof) but other problems: dust under screen, dead pixels, bright pixels, etc. Or the camera itself could have defects. For me I've decided to stop the lottery game because my phone is otherwise perfect as it is. If there were a couple things wrong I would sell/exchange in a heartbeat.

To be honest, the exchanging game is probably shortening my lifespan. Every time I get a new set my heart beats really fast. I check, check and check, hoping everything is fine. No dead pixels, no dust. (TBH I don't really check for those so intensely anymore, because I'm sure if I look too hard, I'll probably find it). Then the screen tint is still there, on the new phone... That's why I chose to settle instead, despite knowing there's a slim chance I could end up with a less-lemoney unit. There's no point wasting my life on a stupid phone. The phone is supposed to be a tool that helps us do things; we're not supposed to be slaves to it.

(3) Return your phone and solve your cognitive dissonance once and for all. The LG G4 is coming out (or at least, announced) in a few days' time. It has a Super LCD screen, so no AMOLED bull****. The camera is supposedly better with a f/1.8 lens, and has full manual + RAW controls, so camera aficionados need not worry. In fact, I'm contemplating a switch---and it's highly advantageous since the resale price of the S6 will probably be about the same (or even higher!) than the price of a brand new G4, if history is anything to go by.

(4) Design a screen protector that has the reverse-colour tint in areas where your phone has a tint... I don't know how feasible this would be but it could be an option worth exploring?