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Old June 6th, 2011, 03:10 PM   #1 (permalink)
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Default Heating problem with S2

Hi Members,

I am seeing a very weird problem with my Samsung galaxy s2 which I bought yesterday only.. If I play a games for 30 mins or use my phone for continuous for 20 - 30 mins it gets very hot. Mostly the area near by the back camera and in front just upper to Samsung logo get's very hot.. I can not even take any call as it's too hot when it touches to my ear....

Is it a hardware problem or software ?? I am confused.. Please help..

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Old June 6th, 2011, 04:14 PM   #2 (permalink)
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It's possibly related to both the hardware and the software as the CPU is generating alot of heat to play those games flawlessy, but the ROM could be altered by Samsung, so at least it might not get quite as hot as a lot of units currently are doing... link here - Galaxy S II very hot - xda-developers

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Old June 6th, 2011, 11:57 PM   #3 (permalink)
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Originally Posted by Beaker491 View Post
It's possibly related to both the hardware and the software as the CPU is generating alot of heat to play those games flawlessy, but the ROM could be altered by Samsung, so at least it might not get quite as hot as a lot of units currently are doing... link here - Galaxy S II very hot - xda-developers

Ian

I think it is software. Mine used to get hot all the time and after I updated to KE4 and then flashed the Euro KE7 firmware it now NEVER gets hot. Even gaming it gets slightly warm but nothing like before.

@Tarun what firmware and model do you have? Just curious. Dial *#1234# to find out
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Old June 7th, 2011, 05:35 AM   #4 (permalink)
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Default S2 getting hot during charge

Hi all,

I have the same problem with my S2. I got one on Friday, used it for 3 days, it then froze yesterday, I had to take it back to the store, they exchanged it for a new one, I am charging it for the first time now, the phone is off, just charging, and it is quite hot! As it's off, there's nothing running, no application, GPS, or anything! Is this normal?

I don't really want to have to take it back every 3 days... Any idea of how to solve this problem?

Thanks,

O.
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Old June 7th, 2011, 05:39 AM   #5 (permalink)
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Quote:
Originally Posted by Blue1k View Post
I think it is software. Mine used to get hot all the time and after I updated to KE4 and then flashed the Euro KE7 firmware it now NEVER gets hot. Even gaming it gets slightly warm but nothing like before.

@Tarun what firmware and model do you have? Just curious. Dial *#1234# to find out

Please find the details below..

PDA - I900XWKE8
Phone - I900DDKE2
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Old June 7th, 2011, 05:43 AM   #6 (permalink)
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Originally Posted by olivier_uk View Post
Hi all,

I have the same problem with my S2. I got one on Friday, used it for 3 days, it then froze yesterday, I had to take it back to the store, they exchanged it for a new one, I am charging it for the first time now, the phone is off, just charging, and it is quite hot! As it's off, there's nothing running, no application, GPS, or anything! Is this normal?

I don't really want to have to take it back every 3 days... Any idea of how to solve this problem?

Thanks,

O.
Charging will cause it to heat up even when off. The SG2 is SO thin that it is hard to hide the heat being generated by the CPU or the battery while being charged. "Hot" is a relative term, a phone should get warm but NOT hot to the touch. It is well documented that the SG2 warms up during longer calls of gaming. The battery is being discharged by the CPU and with todays technology, MUCH energy is wasted by making heat.
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Old June 7th, 2011, 06:12 AM   #7 (permalink)
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Originally Posted by greggebhardt View Post
Charging will cause it to heat up even when off. The SG2 is SO thin that it is hard to hide the heat being generated by the CPU or the battery while being charged. "Hot" is a relative term, a phone should get warm but NOT hot to the touch. It is well documented that the SG2 warms up during longer calls of gaming. The battery is being discharged by the CPU and with todays technology, MUCH energy is wasted by making heat.
Thanks for your answer greggebhardt.
I have also read about some software updates that might help keep the phone cool. I am new to Android/smartphone, any idea of what to do if the phone still gets 'hot' in use?

O.
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Old June 7th, 2011, 06:23 AM   #8 (permalink)
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Quote:
Originally Posted by olivier_uk View Post
Thanks for your answer greggebhardt.
I have also read about some software updates that might help keep the phone cool. I am new to Android/smartphone, any idea of what to do if the phone still gets 'hot' in use?

O.
Not much you can do except find and install the update. Samsung is likely hearing this information in these forums and will throttle down the CPU for games but there is little they can do for a long phone conversation. If you think yours is getting TOO hot, I would try another. The circuitry that does the phone will create some heat and is unavoidable.

Some of this might just be because the phone is SO thin.
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Old June 7th, 2011, 06:34 AM   #9 (permalink)
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Originally Posted by greggebhardt View Post
Not much you can do except find and install the update. Samsung is likely hearing this information in these forums and will throttle down the CPU for games but there is little they can do for a long phone conversation. If you think yours is getting TOO hot, I would try another. The circuitry that does the phone will create some heat and is unavoidable.

Some of this might just be because the phone is SO thin.
Ok, well, lets see how it goes. The charge is nearly finished, and the temperature is lower than an hour ago. I'll let you know if it starts melting when I use it.

Thanks!

O.
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Old June 8th, 2011, 11:05 AM   #10 (permalink)
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Originally Posted by tarun19831983 View Post
Please find the details below..

PDA - I900XWKE8
Phone - I900DDKE2


Do you see any issue with the current version of software... ?? I gave my handset today to Samsung to check the heating problem and i found one more guy over there who has the same issue with their S2.. I am afraid if this is the major flaw in their handsets....
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Old June 9th, 2011, 07:54 AM   #11 (permalink)
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This happens to my SG2 when playing games, it gets quite warm but never too hot to touch.

I always put it down to the advanced graphics chip and the fact the phone is so thin.
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Old June 9th, 2011, 09:53 AM   #12 (permalink)
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Originally Posted by Darkflame View Post
This happens to my SG2 when playing games, it gets quite warm but never too hot to touch.

I always put it down to the advanced graphics chip and the fact the phone is so thin.
I vote this the most accurate response.
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Old June 9th, 2011, 10:02 AM   #13 (permalink)
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Quote:
Originally Posted by rushmore View Post
Quote:
Originally Posted by Darkflame
This happens to my SG2 when playing games, it gets quite warm but never too hot to touch.

I always put it down to the advanced graphics chip and the fact the phone is so thin.
I vote this the most accurate response.
+1

To me, it's a no brainer that the phone will get warm at some point if you're extensively using it, like any PC would (except you might not notice it so much due to the internal fan/s).

My handset has never become hot, just a bit warm when i've been charging it and playing a game at the same time for instance. When i charge it overnight, it never gets hot or even warm to touch and this does not happen with general use either.
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Old June 27th, 2011, 09:45 AM   #14 (permalink)
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+1

To me, it's a no brainer that the phone will get warm at some point if you're extensively using it, like any PC would (except you might not notice it so much due to the internal fan/s).

Well, it sounds logical and I wish it was actually true. But it isn't...


I've used the phone heavily in the first week, installing apps, copying tons of files, playing videos, music, trying out various games, just to see what the phone can do, all the while having it on the charger, I had the screen to never turn off etc.

And from all that, it NEVER got hot.

Then, 3 days ago, i had it just laying on the bed, charging locked, with screen turned off. 3 Hours later, it was piping hot and had barely accrued any charge - with nobody using it at all.

And the heat was near camera, not near battery.


So, I think your argument makes sense - when there's nothing wrong.

But I think the SGS2 does have something wrong with it. Maybe some random thing running the processor ragged, even when nobody using it.

Given how Apple treated customers with their bad solder spots on Nvidia equipped MacBooks, I am wondering if I should return this thing while I still can...

I mean what can we expect except denial of the problem and standard lines like "well it'll get hot when you play games"

someone even said it'll get hot when you make phone calls...

Nokia may have lost the plot now, but I remember not one phone from them that had any noticable rise in temperature from making phone calls.

Certainly nothing to burn your ears off...
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Old June 27th, 2011, 11:34 AM   #15 (permalink)
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to anyone having heating problems i would advise you to root an flash either the KF2/KF4 firmwares they significantly keep the phone cooler
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Old June 27th, 2011, 11:38 AM   #16 (permalink)
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I seem to be running KE2 firmware. Jeez how out of date am i ?!! Lol
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Old June 27th, 2011, 01:26 PM   #17 (permalink)
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+1. but gotta wait for vodafail for now to get a updated firmware :/
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Old June 28th, 2011, 03:32 AM   #18 (permalink)
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My phone only got hot on one occasion, but unfortunately it is a situation which I may well have quite frequently. Using the GS2 as a satnav in the car, with google navigation, and plugged into a USB charger. I've used my old iPhone 3G like this for a few years running TomTom and planned to do the same with the GS2 (probably buying TomTom when it comes out) - it was probably my most-used application on the iPhone as I checked traffic for my commute. When I ran the GS2 like this it got worryingly hot, even more so as it's in a case.
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Old June 28th, 2011, 05:07 AM   #19 (permalink)
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Default Return It...

For those of you with Hot phones, return it.

The update will help, but it will still run right on the border of really warm / bordering on Hot.

My Brother just returned his after we compared it to mine, (barely warm after two hrs intense use) and the new one is just fine.
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Old June 28th, 2011, 06:28 AM   #20 (permalink)
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For those of you with Hot phones, return it.

The update will help, but it will still run right on the border of really warm / bordering on Hot.

My Brother just returned his after we compared it to mine, (barely warm after two hrs intense use) and the new one is just fine.
On my second phone and this one is.exactly the same. I doubt this is something that'll be fixed to be honest.
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Old June 28th, 2011, 07:01 AM   #21 (permalink)
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Whats the best temperature app to download to check how hot my phone gets?
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Old June 28th, 2011, 09:56 AM   #22 (permalink)
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i have "android system info" tells you everything.

https://market.android.com/details?id=com.electricsheep.asi&feature=search_re sult
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Old July 10th, 2011, 12:10 PM   #23 (permalink)
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Default Totally agree with you

Quote:
Originally Posted by Tsais View Post
Well, it sounds logical and I wish it was actually true. But it isn't...


I've used the phone heavily in the first week, installing apps, copying tons of files, playing videos, music, trying out various games, just to see what the phone can do, all the while having it on the charger, I had the screen to never turn off etc.

And from all that, it NEVER got hot.

Then, 3 days ago, i had it just laying on the bed, charging locked, with screen turned off. 3 Hours later, it was piping hot and had barely accrued any charge - with nobody using it at all.

And the heat was near camera, not near battery.


So, I think your argument makes sense - when there's nothing wrong.

But I think the SGS2 does have something wrong with it. Maybe some random thing running the processor ragged, even when nobody using it.

Given how Apple treated customers with their bad solder spots on Nvidia equipped MacBooks, I am wondering if I should return this thing while I still can...

I mean what can we expect except denial of the problem and standard lines like "well it'll get hot when you play games"

someone even said it'll get hot when you make phone calls...

Nokia may have lost the plot now, but I remember not one phone from them that had any noticable rise in temperature from making phone calls.

Certainly nothing to burn your ears off...

I too have a SGS2, and facing the same problems mentioned above. And, as you wonderfully stated, i too had a Nokia N95, never did it heat soo badly.
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Old July 12th, 2011, 08:08 AM   #24 (permalink)
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I think it's probably connected with the wifi sharing bug. I can tell by feel when the bug has occurred - the phone gets hot near the camera. I go into the task manager and stop wifi sharing (which by that stage has been responsible for a considerable amount of battery consumption) and stop it. Hopefully the software update just released in the UK will deal with this.

By the way, a thin phone is better at dissipating heat than a thick one. It has more surface area compared to its volume.
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Old July 18th, 2011, 04:11 AM   #25 (permalink)
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Default Phone gets stuck after heating

I have been using this phone for over three weeks now.
The first impression was great. good display and power. android runs smooth.

But in the last week, i have got the phone totally stuck two times. The unlock button for display ON/OFF stops responsding. The area under the camera gets so hot that one can barely touch it.

Both the times, i was driving in my car and bluetooth was paired to the car. Once i got a call and i was talking on car`s headset unit. Second time i did not even get a call. Both the times, the phone was just gone.

I had to remove battery and let it cool off and then it came to life again. I showed it to the store guy from where i bought the phone and he was going to drop it because the phone was so hot.

reading this thread , it looks like that this is not because of some application thats creating the problem but more of some core kernel object thats hogging the CPU.

SAMSUNG should give an update soon to fix it or should call back Galaxy S2s.
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Old July 18th, 2011, 04:35 AM   #26 (permalink)
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Download 2.3.4 / KG1

One of the BEST improvements is that it does not get hot like it did before, even with intense gaming, or with overclocking, temps are much lower!
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Old July 18th, 2011, 04:49 AM   #27 (permalink)
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Download 2.3.4 / KG1

One of the BEST improvements is that it does not get hot like it did before, even with intense gaming, or with overclocking, temps are much lower!
+1 for that suggestion.
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Old July 18th, 2011, 04:57 AM   #28 (permalink)
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+1 for that suggestion.
Cheers for the +1 but unless your using stock KG1 your not utilizing most of the changes which were made at Kernal level as I believe CM is based on 2.3.3. kernal according to the threads on XDA (Unless it has been recently update)
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Old July 18th, 2011, 04:59 AM   #29 (permalink)
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Cheers for the +1 but unless your using stock KG1 your not utilizing most of the changes which were made at Kernal level as I believe CM is based on 2.3.3. kernal according to the threads on XDA (Unless it has been recently update)
Using stock mate... CM7 is still on the cusp of being released for the SGSII... even as I write.
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Old July 18th, 2011, 05:02 AM   #30 (permalink)
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Using stock mate... CM7 is still on the cusp of being released for the SGSII... even as I write.
Stupid me for reading part of your signature, rather than all of it
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Old July 18th, 2011, 06:51 PM   #31 (permalink)
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My experience:-

1) Off wifi when not using

2) Playing Wifi games will cause the phone hotter than normal games eg
Zynga Poker vs Angry Birds, agreed that the place near the Camera will be hotter than normal

3) I just switch from the Rubbery Casing to the Casing with Holes for better ventilation

4) Update whatever software. Currently using K7 (less hotter compare to K1 - but then again, maybe it is my imagination or self satisfaction)

5) Waiting for patch 2.3.4 - I prefer direct from Samsung instead from outsiders as I don't want to void my warranty.
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Old July 21st, 2011, 07:37 PM   #32 (permalink)
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Hi,

This is a firmware issue and is solvable for now if rooting your phone is an option or wait untill the next firmware 2.3.4 which claims to fix these issues and improve battery life.

I had the same problem but there is a few things you can do.

Root your Galaxy S2 then download titanium backup.

Use titanium backup via aptoide to freeze the following ( you need the full version one of titanium backup)

Wifi Sharing
Samsung Hub
and social hub

These can be unfrozen anytime with titanium backup.

This has fixed it for me.

Running high end graphic games will still heat up your phone but this is normal.

Regards,
Eatbean
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Old August 12th, 2011, 05:42 AM   #33 (permalink)
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Originally Posted by tarun19831983 View Post
Hi Members,

I am seeing a very weird problem with my Samsung galaxy s2 which I bought yesterday only.. If I play a games for 30 mins or use my phone for continuous for 20 - 30 mins it gets very hot. Mostly the area near by the back camera and in front just upper to Samsung logo get's very hot.. I can not even take any call as it's too hot when it touches to my ear....

Is it a hardware problem or software ?? I am confused.. Please help..
Hi Guys,

My phone gets so hot after and during simple phone calls, so much so that it wont turn on or off and i have to plug it into the mains to release it.....Its going back
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Old August 20th, 2011, 07:55 AM   #34 (permalink)
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Default SSG2 Heating Issue

Hi members

I have got galaxy S2 which I have bought 2 months ago. My phone also has the same heating problem which i have noticed today and once a month before in which my phone feels Hot near the Ear piece and also on the back side near the camera flash even after using the phone for couple of minutes. Also the same day I have noticed that my battery was having very steep draining slope i.e it just drained from 100% to 30 % without any significant use. Also GPS, Wifi, Blue tooth were kept off.

I approached the samsung service center , they have suggested software update for which they want to keep the fone for couple of days but i really dont want to !

my current firmware is KE4 , Gingerbread.XWKF3

can somebody please guide

Regards

Vikram Bajaj
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Old August 20th, 2011, 11:27 AM   #35 (permalink)
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HI,

I have checked my S2 as under:

PDA: I9100XWKF3
PHONE: I9100DDKE4
CSC:I9100ODDKF3

Build info: Thu Jun 9 KST2011

Model Number GT-19100

Android: 2.3.3


Is this the latest update?
Where can i find the latest update to download to PC and then download it to Mobile.
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Old August 20th, 2011, 03:26 PM   #36 (permalink)
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To update firmware either:

(a) go here, download and install Samsung's Kies software, then connect handset to PC with USB cable and check for updates

(b) go here, read the instructions carefully, and install any available GS2 firmware at your own risk.

These and other useful links can be found in the sticky at the top of the forum index.
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Old August 21st, 2011, 08:04 AM   #37 (permalink)
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Confused S2 Overheating

I just picked up my phone from the table and it was hot. Not like the normal heating when you talk but really hot!

The phone was neither charging nor was I on a call. The WiFi, GPS and 3G were also deactivated.

The battery is at 61% and there is enough free memory and space.

- Only 411MB used on the device memory
- Only 163MB RAM being used

The only oddities were that the phone was constantly trying to Sync & the battery usage showing Twitter as using 79%.

Is this happening to anyone else? Any solutions?
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Old August 21st, 2011, 08:20 AM   #38 (permalink)
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It happened to me the other day while charging my batt temp was 46c, it turned out that my anti-virus has frozen and was using 45% of the cpu i ended the process and my phone temp returned to normal, I found this out by using the free version of watchdog.

https://market.android.com/details?id=com.zomut.watchdoglite&feature=search_r esult
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Old August 21st, 2011, 09:29 AM   #39 (permalink)
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yeah it could be causd by an app.. also, it happens mainly on older firmware.. which firmware are u using? (settings/about/build )i havent noticed heating on any of the newer firmwares.. although if its an third party app bug, it could happen

ur twitter battery usage is also suspicious. 79% for anything other than android OS is very strange.. i'd monitor that if i were u
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Old August 21st, 2011, 01:53 PM   #40 (permalink)
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Guys I am also facing the same problem with my phone & most importantly all the sets i have seen so far in INDIA have this heating problem on wifi. i bought it 15 days back , got for my frn as well next week.Just put on the wifi start browsing or start wifi direct n u will notice instant heating.

Went to samsung service they flashed it to KE2 from KE4 saying its newer, but it does not help either.
Pls reply if it needs a replacement being a hardware bug.
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Old August 22nd, 2011, 06:46 AM   #41 (permalink)
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i have same problem with my s2
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Old August 22nd, 2011, 09:52 AM   #42 (permalink)
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Quote:
Originally Posted by heshanj View Post
yeah it could be causd by an app.. also, it happens mainly on older firmware.. which firmware are u using? (settings/about/build )i havent noticed heating on any of the newer firmwares.. although if its an third party app bug, it could happen

ur twitter battery usage is also suspicious. 79% for anything other than android OS is very strange.. i'd monitor that if i were u
Well I did monitor it and the usage is back to normal. Right now, the highest is Calls which is at 30% and it seems to be normal as I was on the phone all day. The battery is at 37% after 11 hours of use + WiFi+3G which is a first!

About the firmware, the build number shows me Gingerbread.XWKF3 and the Android version is 2.3.3. Is that the latest or does it need an update?


Quote:
Originally Posted by hellosks View Post
Guys I am also facing the same problem with my phone & most importantly all the sets i have seen so far in INDIA have this heating problem on wifi. i bought it 15 days back , got for my frn as well next week.Just put on the wifi start browsing or start wifi direct n u will notice instant heating.

Went to samsung service they flashed it to KE2 from KE4 saying its newer, but it does not help either.
Pls reply if it needs a replacement being a hardware bug.
Quote:
Originally Posted by waleed29 View Post
i have same problem with my s2
This worked for me, see if it helps you...

Start your WiFi / 3G and let each app update itself. Check your battery usage (Settings > Applications > Battery Usage) for anything that seems out of the ordinary. If there's an app which is taking more battery than it should be, uninstall it and install it again. (In my case it was twitter.)

Check for an app which may be taking more memory (RAM) than usual.

Remove any apps which you may have installed using a .apk file download from a rapidshare, filetube, etc. (I had a few stupid games.)

When it turns hot, switch off your phone and turn it on after 10-15mins and it should be fine.

I'm not sure which one (if at all) worked but I did all this and now my phone works fine. Hope it works for you'll too!

Luck
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Old August 22nd, 2011, 09:59 AM   #43 (permalink)
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Hahh! 30 seconds after typing my earlier message I see this!

Quote:
How To Update Samsung Galaxy S GT I9100 to XXKH3 Gingerbread 2.3.4 Firmware http://t.co/akkbeJI
It's a step by step. Hope it helps.

@heshanj Answered my questions. Thanks for all the help. Appreciate it.
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Old September 10th, 2011, 02:56 AM   #44 (permalink)
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Hi,

Bought my S2 yesterday, and upon browsing and playing games for minutes it gets hot.
And the battery life just sucks! I then thought of browsing on forums since im not sure if im the only one who experienced such, and was shocked that others also did.

I wonder if i should go back to the samsung store and asked for replacement or just upgrade the firmware first.

I then downloaded kies to see if my firmware is upgraded.

CURRENT FIRMWARE VERSION : PDA:KF1 / PHONE:KF1 / CSC: KE5 (XTC)
LATEST FIRMWARE VERSION: PDA:KH2 / PHONE:KH1 / CSC: KH1 (XTC)

Should i upgrade my firmware? Or just go back to the samsung store? Please advice. I badly need help.
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Old September 10th, 2011, 02:59 AM   #45 (permalink)
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Default S2 Hot and Battery Issues.

Hi,

Bought my S2 yesterday, and upon browsing and playing games for minutes it gets hot.
And the battery life just sucks! I then thought of browsing on forums since im not sure if im the only one who experienced such, and was shocked that others also did.

I wonder if i should go back to the samsung store and asked for replacement or just upgrade the firmware first.

I then downloaded kies to see if my firmware is upgraded.

CURRENT FIRMWARE VERSION : PDA:KF1 / PHONE:KF1 / CSC: KE5 (XTC)
LATEST FIRMWARE VERSION: PDA:KH2 / PHONE:KH1 / CSC: KH1 (XTC)

Should i upgrade my firmware? Or just go back to the samsung store? Please advice. I badly need help.
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Old September 10th, 2011, 03:24 AM   #46 (permalink)
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upgrade - not guarenteed but makes a difference to a lot of people. plus you can still take it back if you've upgraded officially through kies

also look on the sticky tips thread above - there's a whole section on there on optimising your battery. with tweaks and playing around, you should be able to get much better performance. it just takes a bit of time/patience/trial and error to get the balance right.
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Old September 10th, 2011, 03:37 AM   #47 (permalink)
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yup, an upgrade should help both issues. however, KG5 or KH3, which u can download and flash manually, would make a much bigger difference, both running 2.3.4 gingerbread

if u want to stick to kies, its ok.. go ahead, and see if the update helps, it might.. but the latest kies update available in ur region is KH2, which is android 2.3.3 i think.. so it might not be as effective as a flash via Odin
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Old September 10th, 2011, 04:08 AM   #48 (permalink)
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i was on KF1, yeah, it got warm when playing games but not BURNING like some said they had. im on KF4 now and dont notice it at all.
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Old September 13th, 2011, 02:08 AM   #49 (permalink)
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Default S2 heating Issues.

Hello All,
I got my S2 last week. using 3G / GPS for 10 minutes makes the phone very hot (near Samsung logo).
Also the phone gets hot after 10 minutes of calling.
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Old September 20th, 2011, 10:37 AM   #50 (permalink)
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Default apps crashing

hi i have been using sumsung galaxy s2 for about 2 weeks now and wheni play games.. it crashes randomly.. (the app either just close by itself or i have to go to task manager and shut it down manually and the app will be displayed in red showing that it takes up more den 90% of the cpu ) i thot it might just be the game programming problem but this happens to all the games i am playing.. i was wondering if anyone have the same problem.. is it the phone overheated and the hardware becomes unstable? pls advice thanks..
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