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I continue to *not* have heat issues with my 15 Pro Max ***except***:

I used the Mac software “iMazing” to transfer what was a $50 MIDI control app (and even though I bought it, the App Store has completely removed it…meaning on any new device I buy, I cannot download that app anymore (it’s called Lemur, for anyone interested, a rather brilliant app that allowed complete customization of an on-screen MIDI interface, and there is nothing available that’s remotely equivalent).

Anyway…after using iMazing to get the Lemur app onto my new iPhone 15 Pro Max, the phone went through part of its setup procedure again (according to iMazing, that is normal). For a few hours after, the phone was quite warm, and the app “Status” was showing a consistent 50-70% usage. After 3-4 hours, the phone settled down to between 1 and 4% CPU usage and the temperature is now back down to where it was before I restored that one app. I assume that the phone was reindexing everything during that 3-4 hour period.
 
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This is a pure hardware chassis issue. I've worked with titanium and am well versed in its use on the SR-71.
Titanium was chosen for the SR-71 because it has a high heat resistance, a high melting point, mechanically rigid and resistant to damage, and absorbs heat quickly and dissipates it quickly.

So, at Mach 5, the friction of the air flowing over the fuselage of an SR-71 would heat to a very high temperature and make the Titanium flexible and bendable, but maintaining its form. It also allows for the machine to cool rapidly, as the titanium is a poor conductor of heat and loses it almost as fast as it gains heat. Which means if the machine started to superheat, you could reduce speed and use the altitude's outside temps to cool down rapidly.

There was one massive flaw....when Titanium superheats, it becomes like playdoh....it can bend and stretch without losing structural integrity, so oftentimes it would form small bends where fuel could leak. The SR-71 after only one or two deployments could easily lose most of its fuel by leaking and use of afterburner before and during takeoff. It would need refueling in the air and then the aircraft could accelerate and gain altitude.

So, this explains both the bending and heat issues with the titanium iPhone 15 Pros. Titanium absorbs heat quickly and loses it quickly, but in doing so, the titanium becomes soft and pliant, prone to bending and morphing.

Apple would know this....at least they should if they are truly using aerospace grade Titanium, or Ti-6AL-4V. However, that is ridiculously expensive and is used in the production of high bypass turbo-fans (commercial jet engines), wide or thin body airline structural components, military applications, etc. A step above that is surgical, for use in medical surgery environments.

It is more than likely CP-3, or Commercially Pure, Grade 3, the cheapest Titanium usage that is aerospace grade. And the Ti-5Al-2.5Sn used in the SR-71 would have a higher heat tolerance than CP-3, being an Alloy. So, the phone is heating and bending because Stainless Steel and glass absorbed the internal heat slower than the titanium does.

It is only the surrounding edge is titanium, front and back are glasses, so the titanium is small % of the whole surface, really have that big impact? I would say it is more than a17 pro iOS/app/hardware issues.
 
the titanium is small % of the whole surface, really have that big impact?

Stop thinking about heat. Think about radiation, which is what heat is. The titanium is reflecting the radiation back into the phone, rather than absorbing it like previous models of iPhone. As such a greenhouse effect might be occurring.
 
They just need to get out of their clean temperature controlled offices when testing devices and use them in the real world.

Only last weekend i've witnessed a friend's iphone (13 pro i think) refusing to charge because it was in the ... wireless charging compartment in his car. And it was hot there in spite of the air conditioning going at full blast. I'm sure Apple can afford to test their phones in cars where they're used for navigation over CarPlay? They just forget to do it.

On the other hand, this is better than the phone blowing up. Can't win.
 
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They just need to get out of their clean temperature controlled offices when testing devices and use them in the real world.

Only last weekend i've witnessed a friend's iphone (13 pro i think) refusing to charge because it was in the ... wireless charging compartment in his car. And it was hot there in spite of the air conditioning going at full blast. I'm sure Apple can afford to test their phones in cars where they're used for navigation over CarPlay? They just forget to do it.

On the other hand, this is better than the phone blowing up. Can't win.
I also experienced this in the summer sometimes with MagSafe in the car (the official charger even, on a mount). It didn't even say "charging paused" or anything, it simply didn't recognize the charger. The annoying part is that once it's cooled down, you still have to remove your phone from the charger and put it back in order for it to recognize that it can charge with normal temperatures.

Note that using a cable to charge still works in these circumstances (up to at least 80%).
 
This seems to be a prefect example of crowd sourcing peoples feelings and pretending its objectively tested data.

Pull back the layers of this onion and you will find a bunch of people who are intentionally trying to bring Apples share price down so they can get in at a better price or push through a put play that's about to expire out of the money.

Again, I WILL BUY THIS ***** DIP.😘
Great call. So far I’m seeing a lot of noise about smoke but no video of the fire. It’s an article about articles talking about what they saw on social media. Do some actual reporting what the heck is this crap.
 
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The overheating is real. Yesterday, I did a test call with my wife. On a 35 minute call, my battery percentage dropped 22%. I am able to consistently replicate this by just making a phone call. The phone gets very hot on phone calls.

- Instagram not installed
- Background refresh off
- 5G Auto
Do you have an Apple Store near you? I would take it in and show them. You’ll get a new phone they’ll probably get some diagnostics and take the phone for review. Only way to get to the bottom of this.
 
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I also have this issue, checking settings> haptic and setting it to always on does not fix the issue. Text messages wont vibrate at all on the phone, only on my watch while in silent mode.
Ok that’s annoying. Can you try googles gboard and see if the haptics work there?
 
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Wow, nuts. Sorry to those experiencing issues. I upgraded from a 14 Pro. I’ve had my 15 Pro for five days now, no abnormal heating, no issues. I upgrade every year. So far, this is my favorite iPhone. If I have to complain about anything, it’s battery life.
What aspects make it your favorite? ❤️
 
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My iPhone 15 Pro Max does get a little warm/hot when I charge the phone via USB-C. I use my 140W MBP charger or Magsafe Belkin
 
It is only the surrounding edge is titanium, front and back are glasses, so the titanium is small % of the whole surface, really have that big impact? I would say it is more than a17 pro iOS/app/hardware issues.
I know. It's just everyone else was writing nonsense made up ******** trying to explain why Apple suddenly had a thermal venting issue.
 
I did not realize an iPhone 15 pro is capable of reaching Mach 5, or have its temperature raised to 600 degree F where it will superheat the titanium chassis.
It isn't and the iPhone doesn't use that much titanium. Everyone else was writing bullcrap that was overly researched so I decided to take it to the next level.

It's probably the increase in performance allowing it to play AAA DX12 games such as Village and RE4 Remake.
 
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Checking back in,

I put 14 pro right next to 15 pro both were clean setups and paced through similar apps and testing, The 14 pro battery health is 93 and 15 pro is 100.

I did see the degradation show in the burn down of the battery ok, so we know that is not eating more than before, I saw 0 improvement on video playback or general tasks over 14 pro apple state no improvement, and no improvement was made.


Heat, under normal loads the 14pro was just over ambient of 74 degree F, the 15pro was over ambient but you may feel 2 degree delta. So it is noticeable, it is however not break my phone bad.

Battery life on similar apps do similar things with iOS 17, which I feel is a large contributing factor to these issues.

So from this I can say yes thermals are worse on the 15 vs 14, and they should have not relied on the 3nm to buy them out of some poor thermal choices, are these choices they made enough to bork the phone no, but your going to hit the head room faster and throttle faster, however you may get more work done in that cycle burst, the trade of from cycles vs power efficiency.


I am not sure on keeping this vs return, I will continue to compare and contrast,

The new design is of merit as the weight savings are felt, the thermals are troubling,


Charging:

14pro vs 15pro, zero delta hot is hot folks and watts are watts, I can cook a 14 pro in the sun while charging I am sure I can do the exact same with 15 pro


Use:

the 14 pro as stated with the lower clock speed sees lower heating as quickly, in the end they get to around the same thermals again with a delta of a few degrees.

wifi is solid on the same signal ratios

Social media apps do for some reason suck the power....


Overall:

My current verdict is if you had a 14 pro heat monster you will have a 15 pro heat monster. The monster seems to be the same, with a touch less thermal conduction due to the mid frame change they did.
I wished they had leaned into the 3nm process more for efficiency and not speed, I wished they had a turbo boosting mode that when it saw a need for power would more dynamically upclock the base close of the P cores higher, Look social media should not have the P cores running at 3.7, and the caller for the social media apps to pull in the P cores needs to be looked at by Craigs team. There is no reason scrolling reddit or insta to call for P cores, which would see a huge battery boost to all phones not just the 15 pro, I think the 15 pro being right on the edge of thermals has pushed a long standing issue to the for front, that has silently been out murdering batteries for years.

Suggestion to apple:

Fix io17 background tasks that suck down the power to reduce thermals

iPhone 16 restore the mid frame to all units, and add a heat spreading function through out the whole of the rear panel even if it adds 2.4 mm, to reduce the thermal localization feel, and performance. I would not change the Ti frame, nor would I worry about the glass back replacements as it is very simple to fix, as I would lower the not warrenty cost to 149.99
 
I know. It's just everyone else was writing nonsense made up ******** trying to explain why Apple suddenly had a thermal venting issue.
What they all miss is the rails mean absolutely nothing to the thermals of the phone, the heat was never released actively through the rails, the heat was released through the glass after it had warmed it up and then the metal was just an easy exit point once the glass was hot. The Ti does nothing here, it does not make it better or worse.


The mid frame change to have that massive center punch cut out for the Qi 2 charger is the real issue, so the chip is loading heat into the mid frame but it has less surface area for which it can conduct that thermal load, and thus becomes more localized and thus more felt as a hot spot. So had they not caved to the replace back glass effort and keeps a full size mid frame, thermals would be the same...

I bet, if I took a iPhone 14 pro logic board and put it in the 15 pro mid frame design it would exhibit the exact same failures and hot spots as the 15 pro does now even worse, I think they leaned in on the 3nm power, and heat reduction under normal duty cycles and whoops, the P cores are awake for way more things at low use than they knew for not apple tasks. So we have been carrying around the bug, for a long time now, it was just masked with a big mid frame spreader bar.


So how does apple fix this, they make the phone 2.5mm thicker, restore a full size mid frame, and boost the thermal conduction layers / heat pipe to the rails on purpose and not on accident as it is part of the mid frame
 
It isn't and the iPhone doesn't use that much titanium. Everyone else was writing bullcrap that was overly researched so I decided to take it to the next level.

It's probably the increase in performance allowing it to play AAA DX12 games such as Village and RE4 Remake.
🤣 it apparently went over my head. Well played good sir.
 
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