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I am also experiencing an issue with my iPhone 14 Pro getting too hot.

Quick notes:
- iPhone 14 Pro (6 days old)
- iOS 16.1
- 40.3GB out of 256GB
- Case: no and yes — overheats either way
- Charging: no and yes — overheats either way
- Overheating alert from iPhone: none (yet)

The first time was the second day after receiving my phone. I was editing photos and the phone became uncomfortably hot in my hand. I had no case yet. I closed the apps and set down the phone until it cooled off. It was not charging at the time. I disabled more than half the widgets I had set up (on the left-side home screen and on various home screen pages), in case it was just too much for this phone's processor — which seemed unlikely, but hey.

The second time was a few days later. I had a case on it now ("Spigen Ultra Hybrid"). I was using the Imgur app. "Screen Time" said I had been using Imgur for 28 minutes before I'd noticed the phone becoming uncomfortably hot. I closed the app and set the phone aside. I had used the phone for a total of 1hour and 12 minutes. The phone was charging at the time (not fast charging).

I reached out to Apple Support. They asked many questions to gather information. I have not (yet) received an alert from the phone indicating that it is too hot — because I have closed apps and set the phone aside when the phone gets uncomfortably hot.

They ran a diagnostics (Settings > Privacy > Analytics & Improvements > Start Diagnostics With Apple Support).
They said the diagnostics indicated no hardware or battery issue.
I said that the only time I've had a device get this hot was when my old Macbook Pro (2013) had a battery issue, where the battery swelled up and had to be replaced.
They said they couldn't recommend I replace the battery on my phone since it doesn't seem to be a battery issue, according to their diagnostics.
I suggested that, based on this forum thread (which I shared with them), it may be an issue with iOS 16.
They recommended I go to this webpage and leave a comment:

Anyway. Just wanted to contribute to the thread. It's concerning to have the phone get so hot. Not that it's the same situation (at all), but it reminds me of when the old Samsung Galaxy phones were bursting into flames o_O
 
I am also experiencing an issue with my iPhone 14 Pro getting too hot.

Quick notes:
- iPhone 14 Pro (6 days old)
- iOS 16.1
- 40.3GB out of 256GB
- Case: no and yes — overheats either way
- Charging: no and yes — overheats either way
- Overheating alert from iPhone: none (yet)

The first time was the second day after receiving my phone. I was editing photos and the phone became uncomfortably hot in my hand. I had no case yet. I closed the apps and set down the phone until it cooled off. It was not charging at the time. I disabled more than half the widgets I had set up (on the left-side home screen and on various home screen pages), in case it was just too much for this phone's processor — which seemed unlikely, but hey.

The second time was a few days later. I had a case on it now ("Spigen Ultra Hybrid"). I was using the Imgur app. "Screen Time" said I had been using Imgur for 28 minutes before I'd noticed the phone becoming uncomfortably hot. I closed the app and set the phone aside. I had used the phone for a total of 1hour and 12 minutes. The phone was charging at the time (not fast charging).

I reached out to Apple Support. They asked many questions to gather information. I have not (yet) received an alert from the phone indicating that it is too hot — because I have closed apps and set the phone aside when the phone gets uncomfortably hot.

They ran a diagnostics (Settings > Privacy > Analytics & Improvements > Start Diagnostics With Apple Support).
They said the diagnostics indicated no hardware or battery issue.
I said that the only time I've had a device get this hot was when my old Macbook Pro (2013) had a battery issue, where the battery swelled up and had to be replaced.
They said they couldn't recommend I replace the battery on my phone since it doesn't seem to be a battery issue, according to their diagnostics.
I suggested that, based on this forum thread (which I shared with them), it may be an issue with iOS 16.
They recommended I go to this webpage and leave a comment:

Anyway. Just wanted to contribute to the thread. It's concerning to have the phone get so hot. Not that it's the same situation (at all), but it reminds me of when the old Samsung Galaxy phones were bursting into flames o_O
So I just began some frantic Google'ing as I picked up my iPhone 14 Pro from my wireless charger, only to realise it was super hot.

I then saw a notification stating that charging had been put on hold due to the temperature running too high.

It was nearly too hot to touch, which was naturally quite concerning, and the device itself had slowed down to a crawl when I tried to unlock it and pull up some more information.

Interestingly, I noticed it had barely charged overnight, but I'm guessing that's due to the fact I woke up a little earlier than normal, and thus the optimized charge cycle hadn't completed.

Case: iPhone 14 Pro Leather Case with MagSafe (official Apple case)
Version: 16.0.2
Storage: 183.9 gb available of 256 gb total (71.48% available)

I'm not quite sure what's going on, and I'm slightly worried the device might spontaneously combust at any moment 😅

I'm going to try and get on the phone with Apple support and see if they can diagnose anything further, but figured I'd chime in with my experience here — it seems quite coincidental that you happened to post with a similar experience just yesterday.

Here's a screenshot of the notification message I received, "Charging was on hold due to iPhone temperature":

IMG_0659.png
 
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