iPhone 15 Pro overheating after iOS update to 17.3

📱Facing iPhone heating issues? Here's what worked for me on my iPhone 12 Pro:

1️⃣ Backup on iCloud/iTunes

2️⃣ Log out of Apple ID

3️⃣ Erase (Keep eSIM Data)

❌ DO NOT restore from backups! Set up as new iPhone. Wait 2-3 days - no issue! That Indicates...

✅ No hardware/ iOS issue

Now...

📦 Restore data gradually

🔍 Find app/settings causing heat

My experience says this is purely caused by some third-party app that you may have installed.

I am not aware of the ambient temperature in which you are using the iPhone. However --> Keeping iPhone, iPad, and iPod touch within acceptable ...

Store the device where the temperature is between -20º and 45º C (-4º to 113º F). Don’t leave the device in your car, because temperatures in parked cars can exceed this range.

Use iOS devices where the ambient temperature is between 0º and 35º C (32º to 95º F). Low- or high-temperature conditions might cause the device to change its behavior to regulate its temperature. Using an iOS device in very cold conditions outside of its operating range might temporarily shorten battery life and could cause the device to turn off. Battery life will return to normal when you bring the device back to higher ambient temperatures. Using an iOS device in very hot conditions can permanently shorten battery life.

Restart the phone.

If that doesn't resolve it, Reset All Settings. The link below tells you what that resets. It will not delete your apps or data within apps, as it doesn't erase the phone. It will remove your saved Wi-Fi connections, so make sure you know your Wi-Fi password to reconnect.

Return iPhone settings to their defaults - Apple Support

Have you added a third-party keyboard or any VPN apps?

I had the same issues. The resolution was, to reset completely and restore from backup. Just ensure everything is backed up to iCloud. If you are using Signal, you have to transfer the Signal stuff to another iPhone BEFORE the restore, but NOT to an iPad. Then after restore of the iPhone, transfer back the Signal account. Unfortunately, I‘ve lost all Signal chats when I restored my iPhone as Signal doesn’t backup anything to the iCloud!! So, Signal is actually a nogo, but it is used widely on iPhones. I was really ****** off with Signal, and still I am.

Removed VPN, then reset network, and iPhone is working again. I will try to add VPN.

It turned out that I "fixed" this by accident. Restarting my Windows iTunes it required a login to the Apple store. This then triggered a large upload of a file which then allowed my iPhone to be reconnected to the computer. From there it was just time needed (over an hour) to reset my iPhone to factory settings and then restore my iPhone. A further hour was taken to reload all the apps on the phone.

So the failure to connect was purely a software issue that was known by the developers, yet not communicated to support, nor apparently by QA. So much aggravation and stress caused by poor documentation and poor Apple support online, not to mention that Apple assumes another working phone to work with support rather than chat/email on the website. Security feature or just plain thoughtless incompetence?

Completely restored from backup. Be careful, when you use Signal. Read the restore procedures for Signal before you restore the iPhone. Otherwise you will loose all Signal chats. You will need a second iPhone to save your Signal account.

Removed VPN, restarted, and then reinstalled VPN and restarted. iPhone seems to be working.

Try resetting your network settings (This will remove saved Wi-Fi connections, so you'll need to know your Wi-Fi password to reconnect to it):

If your iPhone or iPad won't connect to a Wi-Fi network - Apple Support

"Settings > General > Transfer or Reset [Device] > Reset > Reset Network Settings."

Reb02 wrote:

My Iphone becomes hot

Heating has nothing to do with an iOS version.

Refer to the following few links... These links below indicate this is not an iOS issue. Overheating issues with my iPhone - Actio… - Apple Community

iOS 16

• Hi i have noticed ever since I have update my iphone xr to ios 16 my phone constantly gets hot
• How you can say... No buddy I'm facing heating issue as well in iOS 16, but when I was in iOS 14 I didn't get any heating issue and lag while gaming...
• Over heating battery drain dealy in image capturing screen lag keyboard lag what apple is doing. wanted to downgrade to ios 16...
• after upgrading my iPhone 11 with the new iOS 16 my phone has been heating up and battery running down very fast….any help please...

iOS 15

• After updating to iOS 15, my iPhone 11 Pro Max’s speakers didn’t worked anymore. Also my phone is heating even when I’m not using it, therefore battery life is reducing fast. What can you recommend to do? I don’t have any Apple insurance. Facebook/Tiktok/Instagram and alike videos are hanging up because there is no sound on my speakers....
• Iphone se battery drains super fast; sometime battery level reduces by 5% in 10 mins Power off randomly (although battery lvl at 100%) phone is heating up while opening apps/ using it cant be used as wifi hotspot; my laptop can’t connect to my iPhone’s hotspot. The blue line on top of iphone showing connected to other device is keep blinking as if it’s trying hard to connect please help...
• I always charge my iPhone in the house. Heating up only started yesterday after updating to iOS 15. I never had my getting hot with my previous iOS 14.8.1! I don’t charge my iPhone in the car. Our house temperature is 71 degrees F....

iOS 14

• my phone gets hotter after ios14 . please fix the heating issue
• I just noticed my iPhone 11 was running hot after updating to ios14. Waze app was my problem. It was using 78% of my battery while sitting idle on the table. Deleted waze and seems to have sorted it. Phone no longer hot to touch. Shame, I liked waze...
• The phone 6s is overheating after iOS14 upgrade. Even with bluetooth off, location off etc.. facing the issue.. battery performance drastically reduced...

iOS 13

• Yes, I've got into a pickle with this heat problem too. 13.3.1 was fine (for iOS13) but then came 13.5 and boom the heat started. From there I quickly went back to 13.4 and no joy. I then downloaded 13.5.1 and still no joy. When 13.6 arrived I jumped on it, what did I have to lose. After two days it started heating up again, bugger. It was then I thought I might as well jump on the iOS14 Beta program. The first beta was pretty bad but I waited and Beta 3 was better. We still had heat...
• How do I get back to version 12.4 for my IPhone. iOS13 causing many problems with hearing aids constantly not pairing to heating every click and many apps going bonkers. Music playing without initiating it😳🤪😢...
• Agree. Let’s create some new emojis and other trivial things over fixing the freezing and heating up issues caused by IOS13. I never had these issues on IOS12. I have advised Apple that my phone gets extremely hot causing me to remove from my person because it burns my skin. If it heats up to the point that something else occurs the look out. As I said I parted with my hard earned for this phone and to put up with this for several months. Please make rectifying this a priority other...

Same thing is happening to me now after update. This is not a phone problem but an iOS update problem. I use my phone more hours out of the day than I would like to admit. This is a problem. Seems to be more when watching youtube videos. This never happened before.

Reb02 wrote:

• camera flash and flash lights are disable due to phone temperature

Low- or high-temperature conditions may cause your device to change its behaviour to regulate its temperature. Using an iOS or iPadOS device in very hot conditions can permanently shorten battery life. Store your device where the temperature is between -20º and 45ºC (-4º to 113ºF).

If your iPhone or iPad gets too hot or too cold - Apple Support

I have same issue with iphone 13 pro, but i have only noticed it when 17.3 update dropped out. That was right away noticeably. I use my phone mainly for work, but now at 10am i have to look for a charger and even if i find one, it doesn’t matter because it won’t charge as it is too hot. Basically runs hot any task given. Got hot today whilst typing a report. Awesome 😡

I contacted my cellular provider as apple suport told me to do also and they did some update on their end and told me to reset phone when I turned it back on my phone was erased and is now locked so I cannot even redownload my information. This update really did a number on phone and cell phone companies are being told it’s on their end but don’t let them update your cellular data make things worse.

I've been having major issues with my iPhone 12 Mini since the 17.3.1 update. Phone randomly shuts off (when the battery is at or near full charge - battery health puts the battery at 99% of new capacity), and sometimes won't reboot unless connected to charger. Uses cellular data only, refusing to use wifi, even when on strong wifi. Outgoing SMS messages are always "failed to send" - progress bar gets to about 90% then fails (incoming messages are no problem, though). Constant use of data roaming (despite turning everything off to try to stop this) goes through several gigs a day, resulting in data plan being exhausted almost immediately. Phone sometimes gets hot, and goes through 90% of battery in 5-10 minutes. Other times battery lasts for a day or more.

At one point it insisted that I had incorrectly entered my password several times & made me wait for 30 minutes. Strangely, the phone had been sitting face down on the coffee table for 2 days...and I'm on facial recognition for opening the phone. On another occasion, it insisted the phone could not be used because there was water in the charging port...again, having been sitting indoors, on the coffee table, high & dry, in low humidity.

There are many other weird issues as well, randomly coming and going.

At this point, it is occasionally usable as a phone, but nothing more.

I sure hope Apple comes up with a fix. My plan is to do a backup & restore to my PC computer using iTunes...if it will work. At this point I don't trust it as I tried this a few days ago, got to 98% of completion, and iTunes suddenly declared that the Apple website it uses was no longer available.

After the new iOS 17 update, I’ve been experiencing cellular network issues too. I called my provider (Verizon, and they said the update damaged my phone internally. After resetting my network setting and eSIM a couple times and still no signal. the final option was to bring my phone to a local Verizon and if they can’t fix it in store, then they will just send me a replacement.

I have the 14 pro, I’m not sure if that’s why. However, my husband has the 13 and he updated his phone and hasn’t had an issue.