What's causing your phone to heat up?

People should take this optimistically and view this as a package deal of a "Phone + portable heater".

With winter coming in I would say Apple has added a great option to their device

been a while since i came back to this channel and what a relief that youve gone to ur old format

Thankyou for such a great description. Now I can buy it. I was so worried about

We need a benchmark test before and after when an update comes. Because i know they're gonna make the chip run slower for heat management.

I was waiting for the 15pro to come out, was hesitant to get it after i heard about the over heating issue, but this was really helpful. thank you!

I appreciate the work your do fam, thank you

One of the best videos you have done regarding knee jerk reactions. Great population of samples and attention to detail.

Using the 15 Pro Max while talking on it can make it extremely hot as well. I hope Apple rolls a good fix that takes care of this. I don’t want a bad unit out of my return policy.

Finally A Great Explore Of Phones heat up ❤ Your Work Thanks

Perfect “hand warmer” for the coming season I need one 🤩

I was in the Apple Store yesterday and the two Pro models were definitely putting out a lot of heat. The standard 15 and the older phones were comparatively much cooler. Firmware fix is supposedly in but the store phones apparently didn’t get the message.

Very well done, Lew, 💯😊 it's quite difficult to evaluate smartphone behaviour, especially with charging. All phones I've ever owned have overheated when I record 4K videos. So it's not just iPhones.

Excellent comparison video. Thank you for this test.

My 11pro max started heating up since the update, but I thought it was finally time for an upgrade, so I did to the 15 pro max. Now both phones are heating up the same which made me thing it’s normal and nothing was wrong with my 11pro max. Watching this video makes me realize it’s definitely the iOS 17 update that’s causing all the over heating.

Like some people have already commented, I think it might be the iOS issue as I've noticed my 14 Pro Max being somewhat hotter and its battery is draining like nuts ever since I've upgraded to the iOS 17 and its newest iterations. And yes, charging my 14 PM has been getting warmer with the Apple 35W charger. Great vid!

This is the testing I want to see before buying an iPhone 15 Pro, great video, keep up the good work!

I think it would be super interesting if you had used the new pixel to also measure the temperature along side the other thermometers

Results: no heat issue found. Thanks to Apple for sponsoring this video.

For me it was Instagram on iOS17 (until the last Instagram update), on my 15 Pro AND 13 Pro Max. Just having it open was enough to heat both phones. So my guess is that it's a software issue, maybe a combination of an iOS bug and a bug in an app.

For those who don’t check, Apple already acknowledges the heating issues. They said it’s a bug found in iOS 17 and should soon be fixed

Good test, you put in effort to document the comparison. With this said: The Titanium issue has to be looked at two fold: Titanium acts as an insulator, much better than Aluminum, both ways. So a temperature measured outside the titanium plate should then be converted to a temperature INSIDE the phone. So for 90 degrees measured outside of the phone, knowing the Titanium heat conduction factor, the temperature calculated inside the phone will be more that the temperature inside the Aluminum phone. How much more? By the difference between conduction factors. So if the conduction factor of Ti is half of Al and you measure the same outside housing temp .......

I have the 14 pro max and I noticed when I first got the new iOS update slight higher temps but seems to have stopped. If playing games it gets pretty warm. About the same as my s22 ultra. I know some people about to get the 15 pro max I’m curious to see what they say about temps. I will say my battery life has gone down some too

I think the test could have also been done with the back of the phone on the table. I feel like most people charge that way so they can see the screen. But also it should get hotter because the back will be against the table allowing for less air.

Very interesting indeed !! Thanks for the in depth explanation !! Still probably going to upgrade my phone from the 13 Pro Max to the 15 Pro Max !!

I have had the same experience but with my Iphone 6s still use it to this day but I remember one time I had decided to charge my phone under my pillow and when I woke up in the morning the phone was blistering hot and there was a warning sign on the phone stating I need the phone to cool off so I couldn't use the phone for a bit. I have had newer iPhones since then I just keep the 6s since I'm just really used to it never let me down. I think that this is fairly common and am shocked people are just discovering that iPhones can heat up to such a degree.

I got the 15 pro max. The only time it got hot was during the first startup when my phone was restoring everything from backup and downloading everything. Other than that its been running fine and cool.

I think it has to do with iOS 17. This is because my 13 Pro has been overheating frequently since the upgrade. It was rare for me to get my phone to overheat while driving with GPS and Spotify or UKposts running. It seems to happen every day now.

I think that's the problem with cases like this, same with "fast decline of battery health". It will always never be exactly the same circumstance as any other with the same phone or problem. There are just too many variables at play when trying to test it out or to figure out things. While yes there actually might be a problem in the phone or software but it might be harder to track down and easier for people to just conclude that ALL iPhone 15 that are out in the market as susceptible with overheating issues.

Very helpful. Thank you I just got the 15 Pro. I will be more careful with this one too.

This is something my wife for years has said over her iphones, and i agree with her. Its been too hot for years. She usually stays with the basic iphone, and she likes smaller phones so she even got the SE a few months ago because of heat. Still, too hot. This explains why they don't have ultra fast charging.

I definitely think that this is software related, I've had an eight for a few years and it happened to me on different ios versions, sometimes my phone would overheat in my pocket during winter while it was in airplane mode and nothing was running, it got so hot that it bothered me through a thick pair of jeans. It also happened to my eight when using Instagram, after a few software updates this issue was resolved. I'm interested in what my experience with the 15 will be like.

Overheating has been an issue with some Sony and Canon cameras for years. I have had first hand experience with them and it is very frustrating because cameras cost thousands. Although I don't own any of these iphones, hopefully the issue will be resolved soon because it can be a pain in the backside.

I had a Galaxy Note 7 from preorder and it had the same overheating issues as shown here. I'm interested to see how Apple handles this situation or what the real cause of the issue is.

Great temperature test. I personally only experienced issues with wireless fast chargers on the 15 pro max. The Anker cube would stop charging and the iPhone would say too hot and wouldn’t even hit 80%. Switching to a slower wireless charger solved the problem

I was taking photos on my 15 PM Natural Titanium 512gb (day 8 of use and the phone was inside of the Apple Clear Case) and after about 15min I got a message on my camera app that the iPhone is too hot and the photos were taking much slower. Only happened once and I was outside at about 85F temps. Relatively a non issue for me but it did happen.

the stopping recharging at 80% one is a settings in the iphone in battery options to make it last longer

For me, I had the 12 pro max , and I had to get the camera lenses replaced. I don't like the design that forces me to place the phone face down or could result in damage to the camera system. Once they change the design, I may return, but for now, I'm rocking the s23 ultra

Very interesting test. The results kind of make sense. I'd be surprised if the body material played a huge role between the Stainless Steel 14 Pro and the Titanium 15 Pro. Aluminium has a thermal conductivity of around 236 W/m/K vs ca 14.3 for stainless steel and 22.4 for Titanium. The stainless steel will therefore conduct heat at the slowest rate of the 3 materials used. I think it has a lot more to do with the way the computing power is used as well as the heat transfer area of the larger phones.

This was a great charging video session. I learned a lot between all the distinctive models of the iPhones and the Samsung. I have a iPhone 15 Pro Max and for the first few days, I’ve been using MagSafe charging for the most part. Yes, it’s heating up only at the magnetic charging part And it takes maybe about over 3 to 4 hours to have a full battery charge without using the phone too much. Me personally I have not experienced any overheating issues maybe because the protective case that I have my OtterBox and are usually don’t use high definition stuff like that just the basic essentials of texting looking at videos a couple, Luke camera pictures here and there nothing too extreme or over-the-top. Just like you said, there are a lot of variables that these phones may overheat, and the software issue could be a possibility. A titanium issue could be a possibility, and also what you touch on certain topics via Forbes and other sources they sound completely little bit satirical I would say, but nothing that should hinder other consumers to buy the product. Thank you.

Having 2 iphone 15, the 1st 15 pro max Nature Titanium, used for 2 weeks, nothing wrong or heating issue whatsoever; 2nd came in 3 days ago, 15 pro max White, the only heating peak was when I just unboxed the iphone and restoring the data from Icloud, phone call, charging, video recording, all these functions going through normally without any heating issue or uncomfortably hot situations. I also want to mention that both of my phone have the hybrid magnetic cases and screenprotectors on. So, just use your phone normally, agree with what uncle Lew said in the video: nothing seems like design flaw or out of ordinary.

I am going to upgrade my iPhone tomorrow. The video and comments are very useful 👍🏻👍🏻

Great video! Very interesting info. Basically, if you heavily use a powerful phone with a large battery and then fast charge it, it gets very hot! I’m using an iPhone 13 Pro and have noticed that the phone can sometimes get very hot when using wireless charging. I wonder how these tests would have gone if the charging was only done wirelessly.

This was Very well presented I would’ve liked to seen a 13 Pro Max included too just to see Any difference and maybe 1 aluminum iPhone thanks I really enjoyed watching this, Very informative informative

Old news and by the time you uploaded this the update fix has been sent out lol 😂🤦‍♂️

Thanks for doing this test! Seems pretty even across the iPhone spectrum. Personally, I think many of the Pro Max users are going to have higher expectations and demands, and therefore they’ll be quicker to point out if it’s getting too hot…also, there are multiple factors as mentioned!

Did you turn off optimised battery charging? I think that could affect the charging temp

This is actually a seasonal heat subscription. Christmas season needs portable heaters for damn hands.

Most rational video in recent times!! Thanks for taking the effort to make such a comparison!!

Heatgate, antennagate, bendgate, Apple is the Gate keepers 😂 🔐

Definitely should've used the thermal imagining camera for the fast charging portion too.

How are the thermals now after updates? I am planning to buy iphone 15 pro max but a bit skeptical because of the heating issues reported. And has apple really throttled the cpu?

Thanks for doing this

Glad you bought this up and talked about it. Seems like others wanted to overlook this issue and talk mostly specs

The most suitable guy to report about this issue - after the famous "Bend Gate", is this another "Heat Gate" in the making for iPhone? 🔥

I think the charging bricks could make them heat up. Have you considered trying an apple supplied charging Brick? It could be interesting to see how charging bricks works

It does appear that the heating has been remedied with software patches. When my 15 Pro Max gets here the first thing I do after setup is update the software. I'm glad I waited for a few months to see that issues were resolved. Mine is the natural titanium. I really wanted the blue model since I've been buying black phones for as long as I've been using smartphones. Nonetheless I'm glad I finally bit the bullet and ordered one on eBay. I ordered the 256 model and all other sellers wanted $100 to $300 more for the blue model. It's definitely not a deal breaker for me. I'm looking forward to the new cameras. Dynamic Island? Meh. I'm not a sports fan so about all I'll be using it for is Alaska Airlines, Flight Radar 24 and an occasional timer. The action button? I'll probably use it as the default mute button. USB C is great because I have plenty of chargers and plenty of quality cables, all MFI certified.

This is one of your best videos in a long time. Keep up the creative, practical, and entertaining content Lew! Love and respect from Texas 💪

Lou, I noticed that you tested plug-in connections for all of the devices but I have also noticed that using wireless connection such as MagSafe decimate the phones heat up a lot faster than other options. Plugging the device tends to cool off a lot better but having it on a qi charger just to make it hotter. I don’t know if you’ve noticed that in your tests.

Is there winter already? How many degrees in your office?

Maybe in these trials, a cable with a built in power monitor would be helpful to see how mucu power they're drawing.

Been experiencing the heating quite a while... at first I thought it was because of the updates. First time experienced that kind of heat... Until the temp indicator popup on my screen saying hight temp.

It’s iOS 17. I use my phone for work daily. Lots of screen time. My iPhone 13 worked fine up until iOS 17 released. The battery drains insanely quick. Gets real hot during regular use just playing music sometimes. I have cleared the cache kept less apps open in background and opened up more space despite space not even being close to maxed out.

I have an iPhone 15 pro max. How do I activate the heater. It will be useful in the winter.

My 15 pro was heating up with normal FaceTime use. But it was way hotter when using IG, then I had to put it infront of my AC vent to help it cool. My 14 pro max was kinda the same sometimes. They get hot. But it was noticeably hotter with my 15 pro right out of the box. They fixed it with 17.0.3 though.

I want a 15 Pro Max, but I’ll wait until the software update comes out to see the results.

That's what I've noticed when I charge my 15PM, it gets pretty warm in the middle of the charge cycle then really cools off the closer it gets to 100 charge.

Good job. thanks you for sharing

I haven’t had any issues with mine. I’ve had the 11PM 12 and 12 Pro 13PM and now 15PM and 15 Plus. The only one I’ve had get hot is the regular 12.

have the 14pro and noticed it started heating up a lot after the last update of iOS 16 so I m pretty sure this is a software issue because it significantly changed my iPhone's temp during charge and use

I think there are 2 varianles that need to be considered as well here: the very cool AC-ed room plus the table that the air is cooling and acting like a BIG heat sink. Maybe try heat neutral surfaces like a mattress, in a normal room.

I just got the 15pro and during updating and it was getting so hot! I returned it and explained what’s going on and I even showed the representative the difference on their display that the iPhone 15pro is hotter than the iPhone 15pro max or 15 plus or 15 and all they can say is “that’s weird only the 15pro is hotter than the rest maybe you should get a pro max instead “ 🤦🏻‍♀️🤦🏻‍♀️ .. then the manager came and said trying getting a different color! Like it’s gon make difference and I still exchange it for a different color but it’s still doing the same thing!

I am from Germany. 2017 I bought iPhone 7 plus and that had heating issues. But during 2020 and all I never had heating issues may be battery deteriorated or os update or signal strength in my area improved. If iPhone 15 has this issue I hope it will change after sometime

Amazing review thanks for enlightening us❤

Timmy: At Apple we always strive for the innovation..starting with pro models this year our customers can experience warmth of an apple product. From ios 17 users have an ability to heat iphone to feel warmth and cozy whenever they want to. Eliminating human needs. We really think our users are going to love this feature.

S23U out of the box 1st 2weeks I had heat more than normal especially when I was recording videos even at default quality setting then fixed with an update. Now, noticeably heating when playing or streaming for long time 1h+ especially when battery less than 25%

17.0.3 fixed it. My 15 PM did not overheat and I don’t use Instagram. No diff between my 14 and 15. But the update make the phone run extra cool doing basic stuff.

Is the overheating issue just with the 15 pro max? If so, wouldn't a better test be to get a bunch of 15 pro max's and see how many of them heat up excessively? Because, some devices might not heat up too much and some might, this can establish how recurring this is in the 15 pro max's

Should take wireless/Qi charging into account as well. I’ve noticed my phones get a lot hotter when charging wirelessly.

should be also measuring the power draw of each device for each power brick? it may vary for devices

I own the 12 pro max & I keep auto lock switched off. Now on occasion, once every 4 months or so I’ve accidentally swiped left & put the camera on in my locker at work , now by the time I return 2 hours later I can feel the heat coming off the phone. Even though there was no recording , the swipe left camera feature definitely over heats it. I’m sure there’s an option to turn this off but I’m too lazy to go find it . Just thought I should point out this flaw… I’m planning on keeping my 12 pro max until it really needs replacing … Battery 🔋 health is at 85% 79% is when it needs to go + I’ve kept replacing screen protectors every time one starts to delaminate or gets damaged … My last iPhone , the 7 , I kept until this year then I sold it online, it’s handy as a back up ..

My 14 pro gets extremely hot while connected to my car audio via bluetooth. Has been more noticable after ios 17. So my guess is it is definitely a software issue.

My 15 pro max use to get a little warm in the first few days of owning the device. And battery life was pretty bad as well. But now all of a sudden a few days later it doesn’t warm up very much anymore. My battery life has also improved a lot too. Very interesting how it just like resolved itself over some time

what do you do with those phones after running the tests on them?

I believe it’s the software in the phone. I have a iPhone 13 Pro Max. From the last update my phone started heating up the right side of my camera lens. And for some reason it lost it speed.

my iPhone 14 pro gets a little warm when it charging and when that happens while I’m watching UKposts it makes the screen get like 1 frame every 5 seconds

What about considering the heat trapped by a phone case? I can't go without a phone case, but I do wonder how much it affects cooling.

I kinda wish you measured the heat with just the camera recording, and not charging. To see what the temp gets to from just running applications.

If you have high quality infra red thermal imager from Flir why do you stop using it after first measurement and change to device that is far inferior for measuring?

For me I havent felt it get too hot with or without a case. I could feel my 13 pro max heating up most times while charging. Im using the 35 Watt dual usb C apple brick.

All phones charge at different speeds depending on their charge level. The reason they cooled at the end is because they charge slower after 60-70% and thus create less heat

Recently bought the iPhone 15 plus to replace my mom's old android, one thing I started noticing was the phone overheating. A few things I did after I bought the phone: updated the software and created an Apple ID and hours later I put it on the charger in my room. I will say I will be returning the phone and getting the iPhone 13 instead. I don't think it's the new update. I currently have the iPhone pro max 13 with the updated software and it doesn't over heat.

Hi, i just bought ip15 pro max 2 days ago and same issues i am experiencing. I opened few apps when i experienced that, so try to check which apps causing that 1 by 1. I open you tube played for 5 minutes just fine. Closed the apps and open the Shopee, then when i try to browse some products and played attached video on the product review…. You know what happens?? It shoot the heating like not normal. I repeat for 3x and confirmed it is somewhat not compatible and it heat up. So what i did is remove that shopee apps for now, i dont have this problem using my old ip13 pro max.

S23 ultra looks absolutely beautiful and performs like a beast as well.

Thanks for the review. As I think we all know running a demanding app and charging at the same time will cause any phone to heat up. I am sure there are apps out there that probably still need to be optimized for the iPhone 15. Software updates will deal with this.

I just got the 15 pro max and haven’t experienced any heat problems which was one of my concerns before getting it. It was regularly cool

My old iphone Xs Max used to overheat when charging and I thought it was an old battery issue, especially when it's not holding much of a charge. And so I assumed the newest phone wouldn't have this issue only for it to overheat when charging. I hope this is a software issue and can be fixed. I updated to 17.2.1 so maybe that will fix it?

The issue is with the 3nm yields from TSMC not being as efficient, where regardless of that, Apple still added a GPU core and overclocked the CPU to still have a year over year bump in performance.

You can recreate it with two types of environments mainly the Max model using Third Party chargers, mainly due to you guessed it to the end user. Secondly, turns out running 4k 30 fps in cinematic with any external battery will get so hot you cant hold it, like smoking hot.