My new iPhone 12 mini arrived and I did a retest of everything.
My old iPhone 12 mini's production date is 2020/10/18, week 42. Screen is G9Q manufactured at 2020-09-30
The new iPhone 12 mini arrived today. Production date 2020/11/22. week 47. Screen is G9Q manufactured at 2020-10-28. I found that at maximum brightness, the new one is definitely better. However, at low brightness, it's still bad green cast, I can definitely the difference at some middle difference.
Apple always asked me to wait for software update, and I wondering, if the software make a difference? The new phone arrived with iOS 14.2, sounds like some perfect test to do. Also the iOS 14.4 Beta 2 arrived today, so, why not. I measured at 0,5,10,20,30,50,80 and 100 brightness set by Siri, with true tone on and true tone off. I waited until night to do the measurements.
I did 16 tests on the out of box iOS 14.2 first. Then I updated to the latest software to iOS 14.3 and did another 16 tests. I installed the beta profile and installed iOS 14.4 Public Beta 2, which released today. And did another 16 tests.
Another 16 tests on XS iOS 14.3, and another 16 on the old iPhone 12 mini iOS 14.3. So 80 measurements total.
THERE'S ZERO difference between all three iOS version. They certainly did not fix it at iOS 14.3, and iOS 14.4 beta 2. Maybe iOS 40.4 they will fix it as they said. THERE'S ZERO difference between all three iOS version. Zero. (I mean out side of margin of error by measuring equipment.)
I can see on the new 12 mini, how the excess green fades away with brightness increase. At 80% brightness, it's completely gone.
1. There's 0 improvements over iOS version. Example at 0% brightness, true tone, nightshift, auto brightness all off.
iOS 14.2 above
14.4 Public beta 2 above
Well within margin of error.
2. Green fades with brightness increase. (Examples shown on the new 12 mini on iOS 14.4 Beta 2)
5% brightness
10% Brightness
20%
50%
3. The new iPhone 12 mini is not only brighter than my old one, but also shows less green cast at high brightness
(Examples all from 14.3 on both phones)
old 12 mini, 0% brightness. (see 0% from the new one at the beginning)
old 12 mini, 80% brightness
new 12 mini, 80% brightness, still on 14.3
Old 12 mini, maximum brightness
new 12 mini, maximum brightness.
At maximum brightness, the new one I have is not only 25-30 nits brighter but also has much better whites. At low brightness they both are terrible with green cast. I personally use low brightness a lot.
It's already too and for true tone, I will start another reply.