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I recently spent some time in the CA heat wave with my iPhone 15 Pro on iOS 17.0.3, it went great:

- Took a Facetime video call outside over cellular data in the sun, with Airpods in probably 90F outside. No problem at all - screen brightness was fine, phone did not get hot to the touch with a FineWoven case.
- Used my phone at the beach, no shade, to take photos and browse. Tons of direct sun. Eventually got a bit of brightness throttling, but nothing as bad as the 14 Pro that replaced it. Mostly worried about getting sand in places.
- Hot car, wireless CarPlay, noticed it was heating the phone cubby up a bit while the car was cooling down. No problem after the air conditioning kept up.

Obviously all of this is just anecdotal evidence, but if I hadn't been following this on MR and around the internet, I would have assumed Apple made the 15 strictly better than my old 14, which felt like it would limit the screen brightness when it saw a hint of sunlight.
 
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I recently spent some time in the CA heat wave with my iPhone 15 Pro on iOS 17.0.3, it went great:

- Took a Facetime video call outside over cellular data in the sun, with Airpods in probably 90F outside. No problem at all - screen brightness was fine, phone did not get hot to the touch with a FineWoven case.
- Used my phone at the beach, no shade, to take photos and browse. Tons of direct sun. Eventually got a bit of brightness throttling, but nothing as bad as the 14 Pro that replaced it. Mostly worried about getting sand in places.
- Hot car, wireless CarPlay, noticed it was heating the phone cubby up a bit while the car was cooling down. No problem after the air conditioning kept up.

Obviously all of this is just anecdotal evidence, but if I hadn't been following this on MR and around the internet, I would have assumed Apple made the 15 strictly better than my old 14, which felt like it would limit the screen brightness when it saw a hint of sunlight.
I used iPhone 15 PM for around 5 mins in direct sunlight with ambient temperature around 32 Deg Celsius(90F) for sending some emails, making couple of phone calls and checking some text message. The screen was on during these 5 mins and screen was at full brightness with auto brightness enabled.

I started feeling warmth in Spigen Clear case on sides with a minute, then back and screen got hot to touch within next 2 mins. And within 5 mins everything was superhot, the screen was really hot to touch, brightness reduced automatically, refresh rate went really down(scroll was severely lagging).

I went to shade, it took next 10 mins, to cool down, and everything was fine.

Seems, I need to knock on genius bar's door.

Anybody else, who can confirm for how much time in direct sunlight they can use their 15 Pro/Pro Max before screen starts to feel hot and brightness reduction kicks on.
 
still nothing for me. even when i take it off charge it doesn't feel warm. my case could be hiding that but i had the "same" case on my 12 pro max and that thing got HOT off a charge.

i don't really play games on my phone. can be on a call for half an hour, watch youtube for hours, or scroll through social media with photos/videos. it doesn't get hot. not before 17.0.3 and not after it.
 
Overheating on my iPhone 15 pro just started two nights ago when following my routine overnight magsafe charge. Woke up with the charging paused due to heat notification. Had since launch day without any issues until now. And I have been on 17.0.3 since it released.
 
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Fine woven case (and many other cases) is essentially insulation, so you're not going to feel the heat through it unless it's getting really hot or has been hot for a long time. You'd notice the heat only on the screen or in an overheat message popup.
 
Fine woven case (and many other cases) is essentially insulation, so you're not going to feel the heat through it unless it's getting really hot or has been hot for a long time. You'd notice the heat only on the screen or in an overheat message popup.

Cannot feel it does not mean it is not heating up
 
Cannot feel it does not mean it is not heating up

Not for nothing, but the same can be said for the human body as well. If we went by this statement, then every iPhone, let alone electronic device should be recalled because even though we can't feel it, it heats up.

BL.
 
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