Hey all, just joining in to the party because I found this thread xD
This was my first iPhone 12 Pro Max display (I haven't checked serial number unfortunately) - As you can see huuge vertical line of darker pixels. It was terrible and I have decided to go to authorized apple repair to get a new one on a warranty (we don't have official Apple Store here in Poland, only way to get warranty replacement is either call Apple and they send it to Germany/Czech or go to one of the apple authorized repair shops). First repair shop rejected my request, after waiting 2 weeks for just their analysys they said that "Apple Service Toolkit doesn't show anything bad about display" xD Yeah ofc it doesn't because somehow QC throw this garbage screen to the store, so why would it now show that it is faulty. Other repair shop thankfully replaced it in 2 days time (I would praise them that they are better, but wait for second part).
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I was really happy that I will receive new display, two days later I've received that one - G9Q. When I first looked at it I thought that my bad luck is gone, then I've started scrolling stuff while in bed aaaand I've realized it's the same thing over again, but less visible and in different spot. Also gray is non-uniform, some areas are pink-ish some green-ish. The other problem is, that this display has muuuuuuuuch bigger problem with purple smearing - it's just terrible, red subpixels are appearing waaay before other, scrolling when background is black and content is gray is terrible, also this happens when watching HDR content, for example there is black background and moving gray stuff, or I should say gray and purple stuff xdd Also the display should be brand new - right? But the first day I've tried it I can see burn-in in place of battery, clock and home bar, have I received a refurbished screen? What the heck
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So what I've done? Ofc went back to apple authorized repair shop, I've shown them the photo you see, explained what's wrong, I gave them my iPhone, 2 days later got notification that "Apple Service Toolkit doesn't show any evidence for display issues", asked a guy from service why is that, when previously they replaced my screen - "we would pay as a company to replace that screen, as Apple policy is that we can get refund for replacement if toolkit shows that something is wrong".
So yeah, just called Apple, waiting for postman and I'm sending it to Germany/Czech Repulic, will not see my phone for 2 weeks probably. It's fun to live in 3rd world country (as viewed by Apple) xD The only upside for living here is that we get 2 year warranty by default on everything as it is EU law, but dealing with warranty stuff in stores here is always terrible, they treat you like you are someone who wants to rob their company, it's always funny to talk about this with friends from other countries, when they say "yeah I just went to the store, said whats wrong and received new device right away"
MAYBE THIS TIME WILL WORK