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MIT student proves by A + B that T-Mobile G2x has hardware issues related to overheat

MIT student proves by A + B that T-Mobile G2x has hardware issues related to overheating / shutdown / battery
http://www.lgforum.com/forum/boards/carriers/t-mobile/topics/g2x-g2x-gingerbread-2-dot-3-3-shutdown-requiring-battery-pull-due-to-overheat
Let's share this and be social.
Here are some other references for this same post.
#OccupyLg
LG: http://www.lgforum.com/forum/boards/carriers/t-mobile/topics/g2x-g2x-gingerbread-2-dot-3-3-shutdown-requiring-battery-pull-due-to-overheat
XDA-Developers: http://forum.xda-developers.com/showthread.php?t=1433445
T-Mobile: http://support.t-mobile.com/thread/16431

I would assume a hot reboot would work as well if you don't want to install an app killer
Sent from my LG-P999 using xda premium

If you are having issues you need to post more info. Rom? Kernel? Certain apps can cause issues. If you need help ask. Posting a rumor by a "MIT" kid is not overly impressive to me. Egg heads over think things sometimes.

jcbofkc said:
If you are having issues you need to post more info. Rom? Kernel? Certain apps can cause issues. If you need help ask. Posting a rumor by a "MIT" kid is not overly impressive to me. Egg heads over think things sometimes.
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Click to collapse
RG2X with Faux .47 and on .48 kernal. I am getting exactly what the IT guy described. Overheating during deep sleep while on charger. Non-OC'd with nothing major running in the background. Not even Setcpu or Juice Defender. I will assume this guy isn't on RG2X's rom nor on a MIUI rom. Maybe on Faux but I think it would be better to assume he is probably on 2.3.3/4 stock. Also he stated it was on two different phones that he did both of these tests we can assume it's not a rare thing. Noted it's not with every phone this happens but some for sure are getting dead phones upon wake. Because they die probably about half way during sleep by the time the person wakes up they only notice a dead phone that needs a battery pull. The heat is already gone so they wont notice the over heating. I actually felt my phone overheat on the charger so I can tell you what this guy is saying has some weight to it.
I shouldn't assume I should just read "We both a running stock lg g2x gingerbreads and have not tested it on any other roms"

psychoace said:
RG2X with Faux .47 and on .48 kernal. I am getting exactly what the IT guy described. Overheating during deep sleep while on charger. Non-OC'd with nothing major running in the background. Not even Setcpu or Juice Defender. I will assume this guy isn't on RG2X's rom nor on a MIUI rom. Maybe on Faux but I think it would be better to assume he is probably on 2.3.3/4 stock. Also he stated it was on two different phones that he did both of these tests we can assume it's not a rare thing. Noted it's not with every phone this happens but some for sure are getting dead phones upon wake. Because they die probably about half way during sleep by the time the person wakes up they only notice a dead phone that needs a battery pull. The heat is already gone so they wont notice the over heating. I actually felt my phone overheat on the charger so I can tell you what this guy is saying has some weight to it.
I shouldn't assume I should just read "We both a running stock lg g2x gingerbreads and have not tested it on any other roms"
Click to expand...
Click to collapse
If (big if) the overheating observed is due to heat from the battery charging leaching into the phone, wouldn't a quick and easy fix/test be a piece of aluminum foil between the battery and the phone?
Sent from my LG-P999 using Tapatalk

I have no problems at all. Running CM7 Latest Kang / Faux .48 CM battery. The last few versions of Faux's kernel fixed the SOD. I have never done an exchange. I got my G2X the 1st week it was out. I have never had any problems at all once the phone was rooted. Only thing I have problems with is the screen bleed. I am not OCed at all just UVed. When the phone screen is off setcpu sets the cpu at 389min 503 max. I have no overheating problems. So if you have overheating I would say that your phone is broke, you need to lower the OC if you are OCing, or you have done something wrong with the software.

Prod1702 said:
I have no problems at all. Running CM7 Latest Kang / Faux .48 CM battery. The last few versions of Faux's kernel fixed the SOD. I have never done an exchange. I got my G2X the 1st week it was out. I have never had any problems at all once the phone was rooted. Only thing I have problems with is the screen bleed. I am not OCed at all just UVed. When the phone screen is off setcpu sets the cpu at 389min 503 max. I have no overheating problems. So if you have overheating I would say that your phone is broke, you need to lower the OC if you are OCing, or you have done something wrong with the software.
Click to expand...
Click to collapse
Thanks for the report captain obvious.
I am glad your setup is fine. For those that are in stock configuration and non oc'ed yet experience these problems, they have probably come to realize that there is no support from tmobile or LG.
If the words "restart " or "shut down " during your tech support convo, you will be told to suck it up and wait for a software update. An update which will probably not come considering how many months has passed.

erikikaz said:
Thanks for the report captain obvious.
I am glad your setup is fine. For those that are in stock configuration and non oc'ed yet experience these problems, they have probably come to realize that there is no support from tmobile or LG.
If the words "restart " or "shut down " during your tech support convo, you will be told to suck it up and wait for a software update. An update which will probably not come considering how many months has passed.
Click to expand...
Click to collapse
FYI if it does it on all roms then its a hardware issue and software change wont fix it...
Sent from my LG-P999 using xda premium

I also had the dreaded sod at least once every couple of days.
However, after I installed eb kang with faux oc/uv profile with set cpu, I have had no problems since.
I guess its ymmv...
Sent from my LG-P999 using XDA App

No problems at all here with overheating or SOD. I have over 200 apps installed. And yes, I'm seriously still running stock Froyo.
The only problems I've had are sluggishness and freezing after disconnecting the USB (both computer and wall chargers.) I think it's an automatic sync thing, or possibly something reading my 10GB of music files on the SD.
Got mine the first week out too, but from Amazon.

gggirlgeek said:
No problems at all here with overheating or SOD. I have over 200 apps installed. And yes, I'm seriously still running stock Froyo.
The only problems I've had are sluggishness and freezing after disconnecting the USB (both computer and wall chargers.) I think it's an automatic sync thing, or possibly something reading my 10GB of music files on the SD.
Got mine the first week out too, but from Amazon.
Click to expand...
Click to collapse
I don't think anyone is saying this problem effects everyone. It's just with all the bad units out there with this problem, this is probably why it's happening. Right now I'm trying to run some profiles in setcpu to see if it improves my phones sleep. It's only been one day so I will see by the end of the week how this fares
Sent from my LG-P999 using xda premium

Cm7, morfic Trinity kernel, go launcher ex oc'ed to 1.4 ghz. Perfect! No issues!
Sent from my LG-P999 using xda premium

erikikaz said:
Thanks for the report captain obvious.
I am glad your setup is fine. For those that are in stock configuration and non oc'ed yet experience these problems, they have probably come to realize that there is no support from tmobile or LG.
If the words "restart " or "shut down " during your tech support convo, you will be told to suck it up and wait for a software update. An update which will probably not come considering how many months has passed.
Click to expand...
Click to collapse
Posts like this post is the reason why the devs hate the G2X. Most if not all problems most of the time are with android. If you are not using setcpu to control the cpu by setting up profiles for screen on and off. Then you are missing out on what root gives you access to. My phone might have the same problem yours have with overheating but i will never see if because my phone is UVed and runs at a lower CPU speed when the screen is off. If you want to use my setcpu profile look at my last post.

Prod1702 said:
Things like this post is the reason why the devs hate the G2X. Most if not all problems most of the time are with android. If you are not using setcpu to control the cpu by setting up profiles for screen on and off. Then you are missing out on what root gives you access to. My phone might have the same problem yours have with overheating but i will never see if because my phone is UVed and runs at a lower CPU speed when the screen is off. If you want to use my setcpu profile look at my last post.
Click to expand...
Click to collapse
The overheating is not a Android problem it's a LG doesn't know how to product test problem. All my other Android devices didn't have this problem. One did have an SOD problem that was fixed but I never had to deal with overheating. This is on LG not Google.

psychoace said:
The overheating is not a Android problem it's a LG doesn't know how to product test problem. All my other Android devices didn't have this problem. One did have an SOD problem that was fixed but I never had to deal with overheating. This is on LG not Google.
Click to expand...
Click to collapse
My friends amaze 4g has it friends Samsung fascinate has it galaxy s 4g and my old g1 and mt3g had it...
Sent from my LG-P999 using xda premium

mt3g said:
My friends amaze 4g has it friends Samsung fascinate has it galaxy s 4g and my old g1 and mt3g had it...
Sent from my LG-P999 using xda premium
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Click to collapse
I think the term overheating is thrown around too loosely here without more of a description. There's the type of overheating that causes our phones to shut off and stay off until the battery is pulled. There is also the type of overheating that occurs when you plug in an HDMI cable, which may or may not cause your device to die.
I'd assume those two types of overheating are the same, as they result in the same thing: dead device that won't turn on without a battery pull. And the phone gets hot as fsck. Hot as in you'd be scared to keep it in your pocket because (1) it'll burn your leg and (2) you are scared the battery will explode.
Those two types are overheating are different from your phone merely heating up upon use. I'm talking about charging the phone while navigating via GPS at full brightness or playing a graphically intense gaming. That magnitude of that heat is normal. And I'm guessing that's what all your devices have experienced.
And as all the devices get thinner, that battery's going to sit closer and closer to your hand, which equals more heat. And as the glass technology gets thinner (gorilla glass 2.0), your face will probably feel the heat to a greater degree as well.
---------- Post added at 04:18 PM ---------- Previous post was at 04:13 PM ----------
psychoace said:
The overheating is not a Android problem it's a LG doesn't know how to product test problem. All my other Android devices didn't have this problem. One did have an SOD problem that was fixed but I never had to deal with overheating. This is on LG not Google.
Click to expand...
Click to collapse
It's true, it's not android, it's LG.
And to all the people thinking that undervolting and underclocking your phone will fix everything, it won't. Android already underclocks the CPU when it's not in use. SetCPU does nothing in this instance. The only instance they'll see a difference is if they have some sort of rogue app that's maintaining a wake lock. You just can't beat terrible design (referring to the MIT guy's findings). Sometimes it'll work, sometimes you just lose.
LG majorly screwed up with this and I hope that their mobile efforts in the future fail for their lack of follow through.

I think I've avoided the charging SOD by accident....
I don't like the official LG charger since it uses a microUSB cable which I'd rather have as a spare on my computer..... so most of my charging is done with an old charger I just had laying around, which turns out to be 0.7a instead of 1.0a which the LG charger is, or on USB which goes through about 3 different hubs so probably has little power left by the time it gets to the phone.
Sure, charging is a bit slower, but that probably prevents some of the overheating.
Lesson: If you're having overheating during charging, dig through all your old chargers and find one with a lower output rating. Use the higher output ones only if you're in a hurry to charge.

Just wanted to say that this thread has been really helpful to me. Every time I've flashed a custom kernel, my phone has always, within the first 2 nights of installation, turned off in the middle of the night while on the charger. So I've always been stuck with the stock kernel. But then the suggestion to use SetCPU to lower the speed while the screen is turned off worked for me. So far no SOD and my phone has survived Faux's kernel and charging overnight without a battery pull and without overheating.
Now I can try out custom kernels and find all new ways to destroy my battery by doing things I'm not knowledgable enough to be doing!

lotherius said:
I think I've avoided the charging SOD by accident....
I don't like the official LG charger since it uses a microUSB cable which I'd rather have as a spare on my computer..... so most of my charging is done with an old charger I just had laying around, which turns out to be 0.7a instead of 1.0a which the LG charger is, or on USB which goes through about 3 different hubs so probably has little power left by the time it gets to the phone.
Sure, charging is a bit slower, but that probably prevents some of the overheating.
Lesson: If you're having overheating during charging, dig through all your old chargers and find one with a lower output rating. Use the higher output ones only if you're in a hurry to charge.
Click to expand...
Click to collapse
hmm.. I dont doubt you, but I think doing that would not be any different.
BECAUSE, the charger is not constantly charging at 1A rate. If you notice, the phones ramps down the input current after a certain percentage ~90%, and trickles it up to 100. Once at 100, the charging is supposed to be stopped. I've charged mine with my bluetooth 500ma charger, and I didnt see a difference in heat temps; only charging time took longer.
As far as heat, Lion batteries should be able to handle 1C charge (1 x charge capacity) with no problems in heat. That means even at 1.5A charge, it should be OK.

Regarding overclocking, undervolting and overheating. There is a variation of parameters across every silicon wafer; among the 25 or so wafers in a wafer lot; and from wafer lot to wafer lot. This is referred to as the "spread" and parts at the extremes are called "corner parts". Most parts should be in the middle of things, not all. With newer parts and small silicon process geometries, the margins are typically smaller - hopefully improving as the fab gets experience with the new process.
A hardware developer should get corner parts to check their PCBA layout and FW, to see if they have design margin. In the case of DDR (RAM), the voltage, circuit layout and DDR interface timing (from Tegra, in this case) should be checked across some tolerance and with the corner parts. "Fast" parts can draw more current during operation that nominal parts, possible heating up the voltage regulators nearby.
In a good hardware design, everything should work across part variation and the specified operating temperature for the system. When we start playing with the clocking frequency and voltages, there is the risk of FW crashing and HW flipping out. The symptoms can include system shut down (lost), resets, heating, bad effects on other systems (battery, voltage regulator circuits, etc.).
This is why some of us (like me) have little luck Set CPU and others can change it to extreme. What none of us know is how close to the design limits the G2X is - the system and the components like Tegra, the FW control. If due design diligence was not done, the sensitivity to part variation and our hacking is greater than normal.

Insane CPU temperatures

Hey guys,
I am calibrating my battery atm and as you may know you have to discharge your device fully to calibrate the battery properly. To speed up the process I decided to install a stresstest app to my phone and guess what: the phone gets insanely hot, I can't even hold it in my hand longer then 5-10 seconds. Kernel tuner displays me temperatures between 78 and 82°C.
But this overheating problem not only happens with the stresstest. When I start watching videos on youtube or start using my phone for maps it gets hot too (about 60-70°C). It starts to bug me.
What do you guys think I should do to fix this? I already thought about applying some thermal compound between the CPU and the metal shield around it. But I'm not quite sure if it's a good idea. I already have a new phone but I still need two phones because I have to travel between Germany and Switzerland all the time. And this issue starts to make my Sensation unusable.
Send from my flying Note 2

I would suggest an anker battery. It has a greater capacity and it keeps the battery very cool.
Sent from my Ouya

did you try different kernels?

AndroidSupporter318 said:
I would suggest an anker battery. It has a greater capacity and it keeps the battery very cool.
Sent from my Ouya
Click to expand...
Click to collapse
Already using it and I'm talking about the CPU temperatures and not the battery's temperature.
And sure I did try different kernels. Even at stock kernel setting this thing gets hot as f***!
Send from my hovering Note 2

So I just decided to disassemble my Sensation and put some thermal compound on the processor chip. Now I'm not getting over 70°C at full load, 1,56GHz. Pretty good outcome. And under normal use it doesn't heat up over 45°C.
I really have to recommend you this method!

Cooling app (Coolify)

Because a lot a people seem to be suffering from over heating. I decided that it might be useful to bring this app to users attention.
http://forum.xda-developers.com/android/apps-games/app-coolify-cool-android-t2855316

Yeah, I got this one also. Don't know if it's really doing anything. Every now and then it goes off when my phone is on the tylt charger.

Don't need root to stick it in the fridge #troll :silly:
I have no idea how the app works, but I have a feeling you'd be trading cooler temps for sluggier performance.

I never get a warm phone. My m8 use to get warm, but not this

Been using coolify since it was released along with the apps shown below, phone is flying and doesn't overheat
Greenify
Green power
Nlpunbounce
Stoplog
Sdmaid

gsw5700 said:
Been using coolify since it was released along with the apps shown below, phone is flying and doesn't overheat
Greenify
Green power
Nlpunbounce
Stoplog
Sdmaid
Click to expand...
Click to collapse
Using Greenify since S III its really good app and prevented my phone lagging too much. Coolify seems doing nothing. At least for me still heats and reaches 43C on 10 min. single game. Angry Birds, Simpsons Tapped Out etc.

Ahhh, I don't really run games, gaming appears to heat stress most phones

Wrong temperature shown by coolify
I installed the coolify application and sistematically shows a temperature that is more or less 20 degrees lower than the temperature of the Xposed module that shows the same information on the notification bar (I don't remenber the name),
The Xposed module shows the real temperature. In fact upon reaching 100 degrees the phone turns off automatically for high temperature.
It happens to me often browsing complex internet sites (i imagine containing a lot of javascript stuff and/or images).
The application not helped in any way (I will test a little more before uninstalling)
I have an italian 3 brand 10G.

jhericurls said:
Because a lot a people seem to be suffering from over heating. I decided that it might be useful to bring this app to users attention.
http://forum.xda-developers.com/android/apps-games/app-coolify-cool-android-t2855316
Click to expand...
Click to collapse
Different materials and phone construction are making it possible for processors to run at higher temps and not really heat stress components (new LG G3 here and I'll see 100 degrees occasionally, when playing Eufloria or something) but normally I think we can be not so worried about a phone feeling 'warm' in our hand when in fact it's not much warmer than our body temperature.

FractalSphere said:
Different materials and phone construction are making it possible for processors to run at higher temps and not really heat stress components (new LG G3 here and I'll see 100 degrees occasionally, when playing Eufloria or something) but normally I think we can be not so worried about a phone feeling 'warm' in our hand when in fact it's not much warmer than our body temperature.
Click to expand...
Click to collapse
Uhm, mine LG G3 turns automatically off upon reaching 100 degrees.
If you try to touch the power button it's really hot (maybe is right back processor).
Anyway coolify seems not help

[Q] Serious Nexus 5 overheating problem

Hello. I'm new with the account here, but been reading this forum for years.
I'm creating this thread because my new Nexus 5 (which I have for 20 days now) is overheating more than a normal mobile device should.
When i bought it, it had 4.4.4 Kit kat android, and I had that one for about 5 days, and in that time, I didn't notice any overheating, or maybe didn't pay attention, can't remember really.
But after installing official Lollipop 5.0.1, the device is heating pretty good even when browsing internet for 5 minutes, at about 30-40% brightness.
**** Please tell me if some of your devices are acting the same, and is it worth a try to install back an older android to try if it will stop overheating, or my device may be faulty and should I take it back for another one (or maybe switch to LG G2) ?
Because I'm still unable to post image links, i will write it down:
- Ambient temperature: 23 degrees Celsius
- The temperature sensor is taped on the back side, at the side of camera, this is where it overheats most. (even if not using camera)
- Phone temp after staying on standby with screen off: 28 C (it's not warm but it is warmer than desk which it is sitting on)
- After staying idle on home screen with screen on for 10 minutes (50% brightness): 30.5 C
- After chatting on Messenger for 10 minutes: 34.3 C (feels warm)
- After recording video for 4 minutes: 41 Celsius!!! (almost uncomfortably hot in the whole upper half of the phone, both the back side and the screen)
- After 15 minutes letting it cool down, with screen off of course, it is 38 C (still hot to touch), and it stays like that untill I reboot the phone, then it cools down.
The test took about 50 minutes, and after that, battery was drained for about 25%.
-While charging, the phone does not overheat, just gets a little warm which is OK. (haven't tried wireless charging)
P.S. I don't play games on the phone...
Please act quick in case I should return the phone...

the only time my phone gets hot is when im intensively doing a lot of things..
for example.. im playing ingress, have tether ON, and my two sons are using their tablets connected to my phone playing ingress too..
but if i turn off the game and turn off tether, it cools down..
to me it sounds u have something intesively using your CPU and perhaps GPS and other radios.
hold power button.. when PWR OFF shows, long press it and reboot into SAFE MODE...
use the phone for a bit and see if it gets warm... this should tell you if its apps installed.

I only used wifi, no tethering, no GPS, 3G, NFC or any other radios, cell signal is good so phone is not searching for it.
- In safe mode, it still gets warm when using camera. When browsing internet and watching images in google search, also but just mild warm..
- But after sitting and thinking, I've found a problem! After recording with camera and leaving it to cool down, it didn't cool down because it had to make an effort to upload that 5 min video on Google drive via Auto backup!
After turning the Auto-backup off, it is now much cooler!
I will post tomorrow with the results, if something changes...
Anyway, thank you!

First of all, "warm" doesn't mean anything.
Battery temperature does not mean much either, as the CPU is what generates the most heat.
There is a battery temperature throttle that reduces the CPU frequency, but it is almost entirely pointless as the CPU will always reach it's own throttle temperatures MUCH, MUCH earlier than the battery will. The CPU starts throttling at 65C CPU temp (NOT battery temp), and shuts itself down at about 105C CPU temp. Unless your battery somehow reaches a batterytemp of 70C+ (nearly impossible because the CPU will always hit it's throttle first), then I would never even take it into any sort of consideration unless you have a physical battery defect.
Using the camera generates heat since it's CPU and power intensive.
Using the phone in general will generate heat.
Keep in mind that mobile devices are passively cooled, not actively cooled with a fan/liquid.
Not sure what you're so worried about.

Lower your brightness

Lethargy, thank you for a short physics lesson. I'm already into physics and cooling systems so all is clear. I was just worried a bit because all of my previous phones weren't getting this warm (hot), but also never had a multi-core processor in phone eather, maybe that's the reason why I never experienced this before.
Battery temp (measured with app) gets up to 40-42 degrees Celsius, while the phone case gets up to 41 when recording video. Of course that temp won't damage the device, I'm not worried about the processor, but that temp is degrading battery life, in long term.
And about the brightness, phone is not meant to be used at lowest brightness all the time, so that shouldn't be an excuse for high temps. Just sayin'...
Sent from my Nexus 5 using XDA Free mobile app

AlexSRB said:
Lethargy, thank you for a short physics lesson. I'm already into physics and cooling systems so all is clear. I was just worried a bit because all of my previous phones weren't getting this warm (hot), but also never had a multi-core processor in phone eather, maybe that's the reason why I never experienced this before.
Battery temp (measured with app) gets up to 40-42 degrees Celsius, while the phone case gets up to 41 when recording video. Of course that temp won't damage the device, I'm not worried about the processor, but that temp is degrading battery life, in long term.
And about the brightness, phone is not meant to be used at lowest brightness all the time, so that shouldn't be an excuse for high temps. Just sayin'...
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
The only thing that sounded odd was how it wasn't cooling down until you rebooted, but it sounds like you figured that out with the automatic upload setting.
41-42c battery temp can be normal after prolonged usage, though personally I usually see that after a short gaming session. My brightness is around 40% and high brightness will cause extra heat.
Otherwise the phone is very thin so you can feel the stacked SoC and RAM heat up through the skin fairly easily, right around the camera area as you mentioned.
I think each device and CPU is slightly different and can vary by a few degrees under load as well.

AlexSRB said:
Lethargy, thank you for a short physics lesson. I'm already into physics and cooling systems so all is clear. I was just worried a bit because all of my previous phones weren't getting this warm (hot), but also never had a multi-core processor in phone eather, maybe that's the reason why I never experienced this before.
Battery temp (measured with app) gets up to 40-42 degrees Celsius, while the phone case gets up to 41 when recording video. Of course that temp won't damage the device, I'm not worried about the processor, but that temp is degrading battery life, in long term.
And about the brightness, phone is not meant to be used at lowest brightness all the time, so that shouldn't be an excuse for high temps. Just sayin'...
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
Your temperatures are fine and you shouldn't worry about it. It's average for a Nexus 5, and there are throttles/shutdown temps anyways, for both the battery and CPU. I've had mine for a year and there hasn't been any sort of issue, normal usage should be negligible to the condition of the battery.

Ok, everything seems to be ok then. Now I can go to sleep without worrying Thanks guys!
Sent from my Nexus 5 using XDA Free mobile app

HTC u11 heating

I just bought the HTC U11 and it's amazing. The only issue is that since I turned it on it feels quite warm in the hands. (I'm not used to that unless it is on heavy usage)
Is this normal? What are the normal temperature ranges? What are the temperature ranges that you are getting when you use it?
My phone seems to be at 36-40 degrees when connected to the internet, not downloading any apps and on light use.
What's the highest temperature at which I should start worrying?

For 20 days I have it, I have yet to experience it warm in hands (no matter what I do). This is current situation:

Maybe it's doing some updates in the background? Like for me, the Google photos in the beginning (of setting up the phone) would be downloading the thumbnails from my account. My phone run pretty cool to touch, even when running Candy Crush... on my Moto X pure it was hot when doing that.

35-40 degrees is standard for me under normal use, with HTC's bundled case and 28ºC room temperature..
The phone only gets a bit warm (not burning hot at all) but I'm worried about the long term effect on battery life.

Aish466 said:
I just bought the HTC U11 and it's amazing. The only issue is that since I turned it on it feels quite warm in the hands. (I'm not used to that unless it is on heavy usage)
Is this normal? What are the normal temperature ranges? What are the temperature ranges that you are getting when you use it?
My phone seems to be at 36-40 degrees when connected to the internet, not downloading any apps and on light use.
What's the highest temperature at which I should start worrying?
Click to expand...
Click to collapse
Do you feel the area above fingerprint sensor hotter than compared to the other area?

aadeshiscool said:
Do you feel the area above fingerprint sensor hotter than compared to the other area?
Click to expand...
Click to collapse
The phone is hotter on the top and bottom parts of the screen (right above the finger print sensor compared to the middle of the screen.

x_d_n said:
35-40 degrees is standard for me under normal use, with HTC's bundled case and 28ºC room temperature..
The phone only gets a bit warm (not burning hot at all) but I'm worried about the long term effect on battery life.
Click to expand...
Click to collapse
Thanks! This sounds similar to what I'm experiencing. What's weird is that whenever I use the phone I also get a tingly numb sensation in my hands and arm (which has never happened with any other phone)which is also making me more sensitive to it.

namartlu said:
Maybe it's doing some updates in the background? Like for me, the Google photos in the beginning (of setting up the phone) would be downloading the thumbnails from my account. My phone run pretty cool to touch, even when running Candy Crush... on my Moto X pure it was hot when doing that.
Click to expand...
Click to collapse
It's still the same case even a day later, so I don't think it's because of any background updates.
Thanks for telling me!

Aish466 said:
Thanks! This sounds similar to what I'm experiencing. What's weird is that whenever I use the phone I also get a tingly numb sensation in my hands and arm (which has never happened with any other phone)which is also making me more sensitive to it.
Click to expand...
Click to collapse
The phone is shocking you, maybe? Could be distributing an electric charge through your arm...

Aish466 said:
Thanks! This sounds similar to what I'm experiencing. What's weird is that whenever I use the phone I also get a tingly numb sensation in my hands and arm (which has never happened with any other phone)which is also making me more sensitive to it.
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Are you used to smaller phones? Phablets like this are a bit awkward to handle unless you have huge hands, maybe that's the reason.

Mine heats up as well. I only play games like Angry Birds, Plants vs Zombies and Candy crush. I installed CPU-Z to monitor the temperature. Cpu temperature is around 45-47c whole playing games. It reaches 50c while video recording. While Browsing and reading, the temp is around 38-40c. The area above the fingerprint sensor gets warm first and then the rear (near the camera). Is this normal?

50c is nothing unusual for a htc device. If the device feels warm to touch then everything is normal. If the device feels ice cold and you record those temperatures then you have a problem. The chip will have a thermal cut out switch so if your phone gets too hot it'll switch off. I think it's somewhere around 60c-65c as 70c is the standing temp for boiled water which can cause serious burns to skin, like a cup of coffee or tea.