OK, the plot thickens....
Background: I have two iPhone 5's. One for work, one for personal. My original iPhone for work was a 4 on Verizon. I upgraded it to the 5 (from Verizon) when it was up for renewal. That iPhone 5 from VZW had a PERFECT display. The color was just right... no yellow at all. That was a model A1429 locked on Verizon. Moreover, the polarization on the glass was not a harsh 45-degree angle that is known to produce a blue, green, and often red tint on the screen when viewing through POLARIZED sunglasses. When I got my personal iPhone 5, it was an unlocked A1428 model which I put a T-Mobile SIM into it. The display was horrible.. yellow, bad polatization...just bad. Went back to the Apple store the next day, had the sales rep look at my two iPhone 5 screens through my polarized sunglasses and agreed it was horrible... they replaced the A1428 on the spot with a brand new one... guess that..that was bad too... aftre the 4th brand new one they opened up, we found one that wasn't "that bad", but still noticeable with a greenish tint when looking through polizaed sunglasses (which are my prescription sunglasses as well).
Fast forward 5 months to 1 months ago... the power button on my unlocked A1428 model started acting up..the "right" side of it would not activate the button (i.e. turn on/off the phone/display, etc). Took it back to the store...they replaced it under warranty...the replacement one had another bad screen....I called the manager over to look at it and he said they couldn't help me. After convicing him the issue was there, he said "We'll bring out just one more and open it....if it's better, you take it... if not, you decide". Well guess what, it was bad/worse....so I kept the replacement they gave me. Bummed!
A month ago, I bought my wife an unlocked iPhone 5 from the Apple Store to switch her over from her crappy Nokia Lumia 710 (T-Mobile). Hers had yet another bad display. Mind you, when I say "bad display", the screen isn't as "yellow" as much as the polatization issue that I'm referring to. I wear my prescription sunglasses when I drive and all the time outdoors and it makes it impossible to liik at the iPhone screen with a bad polization oin the display.
Apple sets the polarization on their iPhones to a 45-degree angle, but the polarization "level" is too harsh on some vs others. Every unlocked model A1428 I've seen had bad polarization.
I kept rueing the day that my perfect display A1429 Verizon iPhone 5 would have any issues. The camera lens even got filled up with dust... but I dared not attempt to have it "repaired" or replaced....I simply dreaded giving up that iPhone with the perfect display.
Well last week, the inevitable happened...that darned "bad right side of the power button" issue happened to my Verizon iPhone 5. DANGINT! I had no choice but to call Verizon and get a replacement under warranty. The tech support rep on the phone was very understanding and I even directed him to threads on the 'net about the power button issue. He RMA's the phone and ordered a new one. I was really bummed as I was expecting to get another horrible display iPhone 5.
Well it arrived today and gosh darnit...the display was ANOTHER PERFECT ONE!
Now at first, I asked myself "what are the odds of that?"....but instead, I began to think.... are the UNLOCKED A1428's actually Apple's "SECONDS"? Known quality issues that they sell in the stores and online?
Now I've not yet tested with my sunglasses looking at a carrier-locked AT&T A1428 or one from T-Mobile or Sprint. My brother and his wife both have carrier-locked AT&T iPhone 5's....next time I see them, I'll check theirs out.
But I'm starting to think that Verizon has the "Top Grade" units and the unlocked versions are crappy "seconds" that Apple had to get rid of vs destroying them. Or that they even don't "know" they are bad because they certainly don't quality test EVERY unit.
I know, quite a write-up, but I think I'm on to something. I was blind-sided by my replacement Verizon iPhone 5 having another perfect display. Totally unexpected. Really suspicious.....