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iPhone 12 Pro iPhone 12 pro overheating on 5G

apringle

macrumors newbie
Original poster
Sep 25, 2014
8
0
My 12 Pro is gerri g extremely hot. This occurs during normal use, the phone is not charging, and background updates are off. I turned my 5G off and it rectified the issues. I’ll be contacting customer support tomorrow and hopefully they’ll provide a solution.
 

Renho

macrumors 68030
Sep 15, 2014
2,769
1,372
SR, CA
My 12 Pro is gerri g extremely hot. This occurs during normal use, the phone is not charging, and background updates are off. I turned my 5G off and it rectified the issues. I’ll be contacting customer support tomorrow and hopefully they’ll provide a solution.
How was your battery usage during this?
 
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apringle

macrumors newbie
Original poster
Sep 25, 2014
8
0
T the way my wife has the non pro 12 and she is not having this issue.
 
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Dovahkiing

macrumors 6502
Nov 1, 2013
340
227
I have the pro and with regular 5G I am not having this issue. Are you using mmWave? I can’t speak to that since I have Mint mobile and no mmWave on my network. Otherwise sounds like maybe a defective one
 
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brianmowrey

macrumors 6502
Oct 5, 2020
418
127
My 12 Pro is gerri g extremely hot. This occurs during normal use, the phone is not charging, and background updates are off. I turned my 5G off and it rectified the issues. I’ll be contacting customer support tomorrow and hopefully they’ll provide a solution.
How long since setup? Indexing everything you restore or sync to it will hog CPU and battery for a day or two. Some people see Notes atop their battery usage report for the first days. It's an overall UX oversight, but not unhealthy.
 
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Septembersrain

Contributor
Dec 14, 2013
4,118
5,150
Texas
Both my One Plus McLaren and V60 overheated massively. I think 5G modems can get very hot. That's why I skipped this year. I'll see about next year. I do not think all the kinks and issues with 5G are sorted yet.

I also experienced the rapid battery drain along with the overheating.

Edit: I think carrier and availability of 5G makes a huge difference too.
 
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apringle

macrumors newbie
Original poster
Sep 25, 2014
8
0
I have the pro and with regular 5G I am not having this issue. Are you using mmWave? I can’t speak to that since I have Mint mobile and no mmWave on my network. Otherwise sounds like maybe a defective one
Verizon nation wide 5g which I believe isn’t mmwave.
 
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brianmowrey

macrumors 6502
Oct 5, 2020
418
127
Setup was this past Thursday.
K, then it sounds like iOS isn't interpreting your local signal quality in a healthy manner, and is sending too much power to the antenna. Further OS updates might refine this. It's the same issue for 3G and 4G when you're kind of in a grey zone, coverage wise. Apple does too much of their iPhone testing in high-coverage zones and this has been a problem forever.
 
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fafafooey

macrumors newbie
Jun 13, 2012
27
23
I did a Webex call last week on my phone with the camera on for perhaps 25 minutes while on T-MOBILE 5G. I picked the phone up after that and first thing I noticed was how hot the phone was. Never had a phone get that hot before.
 
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SwissGuy93

macrumors 6502
Sep 16, 2016
369
355
my phone is also getting really hot (Swisscom here in Switzerland) with 5G. I have had it since day one and indexing should not be an issue anymore. I think there might be an issue with the carrier? I have full bars here on 5G so the grey zone problem isn’t applicable to me. I am now waiting for 14.2. Maybe they’ll issue an carrier update with that... Sucks honestly since my phone is not usable on 5G.
And yes I have reset the network settings and that did nothing. Love this phone so much but this is just a huge bummer.
 
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apringle

macrumors newbie
Original poster
Sep 25, 2014
8
0
Update.... First off I was incorrect that the issue was only occurring when on 5G. The unit gets hot anytime the browser is being used, apps are being updated, or the camera is being used. Today I did all three at the same time and the phone was extremely hot. I contacted Apple and after some diagnostics they stated they would need to physically inspect the phone. An appointment was setup for me to go in to have the phone looked at. Today Apple contacted me and stated they want to forgo me taking the phone into Apple and instead they want to send my a replacement and have me send the defective unit back t o Apple. I really don't have a root cause to share just some updated info for those interested.
 
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SwissGuy93

macrumors 6502
Sep 16, 2016
369
355
Update.... First off I was incorrect that the issue was only occurring when on 5G. The unit gets hot anytime the browser is being used, apps are being updated, or the camera is being used. Today I did all three at the same time and the phone was extremely hot. I contacted Apple and after some diagnostics they stated they would need to physically inspect the phone. An appointment was setup for me to go in to have the phone looked at. Today Apple contacted me and stated they want to forgo me taking the phone into Apple and instead they want to send my a replacement and have me send the defective unit back t o Apple. I really don't have a root cause to share just some updated info for those interested.
Interesting development. Did they first have you reset your phone and all of that to see if this solves the issue? Or did they do the diagnostic straight away?
 
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apringle

macrumors newbie
Original poster
Sep 25, 2014
8
0
Interesting development. Did they first have you reset your phone and all of that to see if this solves the issue? Or did they do the diagnostic straight away?
They did a diagnostic right away. They then had me do a reset and performed another diagnostic.
 
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Cruncher

macrumors regular
Aug 9, 2010
245
53
my phone is also getting really hot (Swisscom here in Switzerland) with 5G. I have had it since day one and indexing should not be an issue anymore. I think there might be an issue with the carrier? I have full bars here on 5G so the grey zone problem isn’t applicable to me. I am now waiting for 14.2. Maybe they’ll issue an carrier update with that... Sucks honestly since my phone is not usable on 5G.
And yes I have reset the network settings and that did nothing. Love this phone so much but this is just a huge bummer.

I experienced the same also with Swisscom. But only once. Today I did a few 5G Speedtests and the iPhone did not get that warm with full bars. So maybe if the reception is not very strong it could happen with excessive use that it gets a bit hot.

Here in Switzerland we are lucky that we already have a good 5G coverage. It is not as fast as mmwave but with Band N1 and N78 we can get around 1 Gbit/s.
 
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G-Funk

macrumors regular
Apr 28, 2005
157
1
Miami , FL
I’m facing the same issue with my iPhone 12 Pro after updating to 14.2 and it enabled carrier update to enable 5G on Zain Kuwait. Whenever I’m on 5G, the phone tends to heat up and the battery drains a bit faster ! It cools down whenever I switch to LTE or connect to WiFi ! Ever since I had the phone (before 14.2) the phone operated smoothly with so issues of overheating! Could it be something with the update ? I had the same overheating issue with my iPhone 11 Pro after getting it just one week after release ! I have contacted Apple support and did all sorts of testing , resetting , re-installing from backup to no avail ! Only after iOS update that the phone got operating cooler ! Seems it’s either an iOS issue that can be fixed with a software update! 🙏🏼
 
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GrumpyMom

macrumors G3
Sep 11, 2014
9,326
13,337
My iPhone 12 has just started doing this today. It shows the camera was running for an hour and a half and audio, too. I was a bit confused by that as the camera app was closed.

It is still running unusually warm and I’ve rebooted it several times already. I got it last week and it should be done with indexing by now. Even when it was indexing it didn’t get as hot as it has today. I do not have 5 G service. I have a 5G Samsung S20 that does not run hot so I didn’t think it was the modem. I don’t know. I guess I’ll keep an eye on this topic. The problem started just about an hour ago.
 
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GrumpyMom

macrumors G3
Sep 11, 2014
9,326
13,337
Well after its little hissy fit of this afternoon, I am happy to report my phone went back to normal. We took a Sunday evening drive and I took lots of photos, which is a task that has heated up phones in the past. It was fine. I did an iOS update later. All seems well. How are the other overheating iPhones doing? I hope this was a one time glitch or some last minute indexing. One thing I do miss from my Samsung is the ability to pull up a report on any processes running rampant in the background.
 
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