hello there
i have my xperia s for a while following my old x10
i use most of my phones for development purposes some people might know my modded cm7
well up to the question
when i start running games such as minecraft-templerun-shadowgun
after like 5-10 mins it starts to get hot i mean HOT! i return to check the temp it after 10 mins it was 42C and the back was flaming hot and it was not even on the charger!
could someone explain why sometimes i get 46-50C?
maybe it is beacause of the thin back cover or maybe the cpu-gpu uses more power of the battery idk?
any ideas?
greetz.sherko
Same here. I played about 10 minutes of dead space and the phone was real hot. Will this be fixed in ICS or it's a hardware problem?
waiflih said:
Same here. I played about 10 minutes of dead space and the phone was real hot. Will this be fixed in ICS or it's a hardware problem?
Click to expand...
Click to collapse
i don't think it is a hardware problem ?
I played Shadowgun for 1 hour and temperature got to 41 C. And this is the worst option, i ve never seen my phone heated to 45 C.
globetrance said:
I played Shadowgun for 1 hour and temperature got to 41 C. And this is the worst option, i ve never seen my phone heated to 45 C.
Click to expand...
Click to collapse
just played shadowgun for 45 mins and you are right! got to 40C
but other games heat it so bad?
Yes that's annoying,it's like having 1GHz cpu overclocked to 1.5 GHz
I think next phones generation needs cooling fan
Sent from my LT26i using Tapatalk 2
gm007 said:
Yes that's annoying,it's like having 1GHz cpu overclocked to 1.5 GHz
I think next phones generation needs cooling fan
Sent from my LT26i using Tapatalk 2
Click to expand...
Click to collapse
+1 true
but why does it do this maybe beacause of the built in battery?
just like the one x it almost burns my legs
okay people i am going to do some tests
as following
i will play the game that makes the phone the hottest 49C
every test gets 30 mins after 30 mins of testing i check the temp and post
first test is game on full brightness
second is lowest brightness
third is half brightness
fourth will be a test with lowest brightness and airplane mode enabled
i will post the results soon
first test is game on full brightness=46-47C
second is lowest brightness=41C
third is half brightness=42C
fourth will be a test with lowest brightness and airplane mode enabled=38C
Maybe Try a test with cpu freq at 1.2ghz?
Sent from my LT26i using Tapatalk 2
i still run stock FW in a while i will get root ETC.
just like my x10 and other phones i wait a few weeks
Related
Hello again dear xda members
I've been using S II for over 2 weeks now! I get the following(which many of you do get also). When I turn on WiFi and start surfing, the phone starts to overheat and battery is drained like a juice.
Well, after a long study, I've found out that it's the stock browser's fault!
Yeah! I opened WiFi, surfed a little and it started to heat up! Well, I was trying to download something, and since stock sucks at downloading( except if you add to it an app from the market called Downloadfiles) I opened DolphinHD!!
What I saw, or felt-whatever-, was just
After 5 minutes, the phone cooled down, temperature became normal and of course battery was less consumed!
So, to all people who have heat issues, it turns out(at least in my humble opinion) that it's the stock browser's fault!!!
Any thoughts anyone? Similar experiences?
I've been using it for 10 days and experienced no such overheating, but battery time should be much better.
Sent from my GT-I9100 using XDA Premium App
Really? It doesn't overheat never? even not when playing games?
I thought mine was faulty, but I went to couple of stores where they have it open for customers to play with, and I did the same as mine and it started to heat up!
Mine heats up a bit after playing a game or running a certain app for a while, but I never experience overheating with the stock browser. Though you should take in to consideration that the GS2 is a thin device, the CPU is close to your hands. Most phones also have to exessivly keep searching for connections because it is weak or something is blocking its way. The transmitting/receiving device is located at the top along with the CPU so it'll tend to get hot. Most smartphones do overall.
Also, the phone gets hotter while using it connected to a charger just because the battery is filling up the same time you are using it. Also, take in to consideration that no patch for true dualcore support has yet been released nor announced. Just some factors why the phone heats up.
thanks man!
Well, heating up is normal-as far as I read in here-... But when using Stock Browser, I'm talking about overheat! really! I believe it's a bug, since as said, nor Firefox, Dolphin and Skyfire(I use all of them) produce that issue! And I disabled flash content(thought that might make it better) but it was the same! Don't know!
Anyways, thanks for answering!
OVer wifi I have no problems. Over 3G is another story! and playing games is another story. It warms up every 5 minutes while playing games.
Yours too huh? well, mine does that on WiFi!
What is Overheating? How do you know it is overheating unless you know the temperature of the battery? Well OP and other posters who are saying the phone gets overheated please mention the temperature of it. The ambient temp of Europe/USA is 20-25°C Max, and if the device runs even cool then it will have temp around 30-32°C, that is much higher than the ambient temp and probably that's why you guys are feeling the phone is overheating but in fact it's not. Here in Calcutta, ambient is 32-33°C and the Phone temp in normal is the same, so we/I don't feel it's overheating, only when I surf net for an hour straight with charging then the temp rises up to 44-45°C, that's when it could be said that the phone is running on high temp, still for the hardware we are given 45°C is not hot.
So before saying the phone is overheating please check the battery temp.
Regards.
how do I measure battery temperature?
Ok, Battery life widget?
I'll measure then I'll let you know!
There is a reason stock browser uses more battery and heats more. It uses GPU to render pages more quickly! But for me even on stock it is not that hot, more than on other phones, but thats what you get for a thin phone.
Maybe somone will test battery life with stock+GPU and dolphin browser with no GPU. Maybe the difference is not that big at all, maybe just GPU heats more than CPU but uses same battery.
now let's not forget android doesn't have graphics acceleration, and without it the GPU has to work harder which generates more heat
Sent from my GT-I9100 using XDA App
Ok, I get 41 to 45 °C degrees!
So, no overheat just heat!
So, based on what you're saying, this is normal?
Kostask11 said:
Ok, I get 41 to 45 °C degrees!
So, no overheat just heat!
So, based on what you're saying, this is normal?
Click to expand...
Click to collapse
Your ambient is 27°C, right? So it's normal to me. Anything less than 50°C should be OK, imo.
Regards.
My ambient is 34 to 30 °C
Ok, so my phone is fine? Wow! !! thanks
that really made me happy!
I thought it was faulty
Thanks so much everyone for answering
Kostask11 said:
My ambient is 34 to 30 °C
Ok, so my phone is fine? Wow! !! thanks
that really made me happy!
I thought it was faulty
Thanks so much everyone for answering
Click to expand...
Click to collapse
You are welcome. This is mine, phone is untouched for half an hour, my room temp is currently 28°C.
Regards.
I see! Then it's fine
thanks again! It's a big relief! I was coming from Omnia I and I was like wtf
ithehappy said:
Your ambient is 27°C, right? So it's normal to me. Anything less than 50°C should be OK, imo.
Regards.
Click to expand...
Click to collapse
Summer in Greece and sub-30-degrees Celsius don't go together.That's why we're hot!
Anyway,****ty joking aside,inside a bus today,under the sun with an ambient temperature of about 35-36 degrees(dunno how you put the degrees symbol pal ) and with my GPU overclocked at 400MHz with 1100mV using tegrak overclock ultimate,I played some Angry Birds and,although the phone reported no more than 44 degrees,it was very hot at the top.
My opinion?If you(or me obviously) manage to somehow burn/fry something,make sure to do it so bad that it doesn't even respond to Chuck Norris' roundhouse kick! That way maybe Sammy won't notice...Shush!
tolis626 said:
(dunno how you put the degrees symbol pal )
Click to expand...
Click to collapse
Alt+0176.
Funny comment anyway.
Hi everyone
mine is sexy and hot a hell but it's not good
it works at 38C and when watching video or playing games it gets to 40C
and at 41C it reset and kinda smell like burning
I use "Battery monitor widget pro"
please tell me your device temp
Buy an aftermarket cooler.Noctua is good..Mugen 3 not bad too.
yeah x10 runs hotter than any phone I've ever owned..
no wonder so many people have motherboard issues and battery dies so quick.
scoobysnacks said:
yeah x10 runs hotter than any phone I've ever owned..
no wonder so many people have motherboard issues and battery dies so quick.
Click to expand...
Click to collapse
Then you've never owned a HTC Dream (G1). That thing is a little furnace in disguise as a phone
MahZi said:
Hi everyone
mine is sexy and hot a hell but it's not good
it works at 38C and when watching video or playing games it gets to 40C
and at 41C it reset and kinda smell like burning
I use "Battery monitor widget pro"
please tell me your device temp
Click to expand...
Click to collapse
Im not so worried about that mines always around 35-43 and still can enjoy my phone whitout feeling any heat.
Sent from my X10i using xda premium
My phone runs pretty neat when I play hd games for an hour goes max till 40 ..at 1.2 gigs..not much
Sent from my X10i using XDA App
GreatBigDog said:
Then you've never owned a HTC Dream (G1). That thing is a little furnace in disguise as a phone
Click to expand...
Click to collapse
yeah my hero ran hot too..
my newer HTC barely gets to 30 degrees even overclocked to 2ghz
I always have my x10 clocked to the max with smartassv2, and it normally gets anywhere between 30 - 38 degrees with normal usage. Watching videos and stuff gets it to around 40, games get it to 40 - 51. I normally don't let it get up to 50 though.
And if you can smell something burning, that should be a good indication to give it a rest...
Guess I just got a lucky x10
Frosty666 said:
I always have my x10 clocked to the max with smartassv2, and it normally gets anywhere between 30 - 38 degrees with normal usage. Watching videos and stuff gets it to around 40, games get it to 40 - 51. I normally don't let it get up to 50 though.
And if you can smell something burning, that should be a good indication to give it a rest...
Guess I just got a lucky x10
Click to expand...
Click to collapse
lol I dunno if 40 to 50 is lucky that's still pretty high
scoobysnacks said:
lol I dunno if 40 to 50 is lucky that's still pretty high
Click to expand...
Click to collapse
That's true, but only because I'm overclocking so much. On stock clock speeds it rarely goes above 40.
Frosty666 said:
That's true, but only because I'm overclocking so much. On stock clock speeds it rarely goes above 40.
Click to expand...
Click to collapse
I find se phones in general run hot.
the arc has been cracking the body it runs so hot :O
scoobysnacks said:
I find se phones in general run hot.
the arc has been cracking the body it runs so hot :O
Click to expand...
Click to collapse
That is quite true. Compared to all of my friends HTC's, Samsung's, LG's, Moto's and even iPhones, my phone is probably hot enough to cook eggs on.
so I guess it's not fix properly
it's much better now after cpu fc fix but it still resets when go up to 40
what is my next move?
throwing it out?
because I don't want spend another 50$ and get nothing
Mine runs between 29 and 40 sometimes 45 after a lot of abuse while charging
Sent from my X10a using xda premium
Its quite cold here in Melbourne so my phone runs about 29 degrees average... Which is why I think I froze my battery now its draining super quick no matter what firmware I use. Oh well.
Sent from my X10i using Tapatalk
So i was playing Rage of Bahamut, and i think my phone had enough.
The game locked up my entire phone at least 30 times in the past 2 days.
The last one had my phone in "safe mode" and upon reboot all my settings widgets folders and etc are gone
So what happened? What can i do? Why is this game so fubar for my phone
Sent from my SAMSUNG-SGH-I777 using XDA
Edgarhighman said:
So i was playing Rage of Bahamut, and i think my phone had enough.
The game locked up my entire phone at least 30 times in the past 2 days.
The last one had my phone in "safe mode" and upon reboot all my settings widgets folders and etc are gone
So what happened? What can i do? Why is this game so fubar for my phone
Sent from my SAMSUNG-SGH-I777 using XDA
Click to expand...
Click to collapse
It would be difficult to say without knowing how your phone is configured. I've been playing for about a week and have had no problems.
One thing I've noticed is that the phone will get quite hot if I play while connected to AC while playing. But I guess that's to be expected. I have SetCPU set to performance governor and 1200MHz when plugged into a power source. I also have AutomateIt set to turn the screen to full brightness when plugged in.
Could overheating be your problem? If you're sometimes playing while plugged in (to conserve battery, as I am) you might consider using USB instead of AC.
I have been also playing this game for about 2 weeks. No problems... Wait Okay, let me explain my scenario. When i was playing the game on AOKP I experienced the heating problem mentioned above and swapped roms as I thought it was the rom. I uninstalled the game and used AOKP fine for a bit then re installed it and the heating persisted. So I swapped roms to MIUI V4. The problem has been gone ever since <3
I I really don't think my phone is heating up that much.
I've had some games heat my phone to 113 fahrenheit - and sometimes during gaming and charging I'd reach 131 fahrenheit.
I use to use a profile in setCPU that would lower my CPU from 1.6 to 1.2 or something if the temperature got up about 45 degrees celsius but stopped using it because it made my games lag
I don't think my cpu goes above 105 degrees while playing Rage of Bahamut
Sent from my SAMSUNG-SGH-I777 using XDA
Try to bring it to the service center and have t checked
Sent from my GT-I9100 using xda premium
Edgarhighman said:
I I really don't think my phone is heating up that much.
I've had some games heat my phone to 113 fahrenheit - and sometimes during gaming and charging I'd reach 131 fahrenheit.
I use to use a profile in setCPU that would lower my CPU from 1.6 to 1.2 or something if the temperature got up about 45 degrees celsius but stopped using it because it made my games lag
I don't think my cpu goes above 105 degrees while playing Rage of Bahamut
Sent from my SAMSUNG-SGH-I777 using XDA
Click to expand...
Click to collapse
Well, it was just a suggestion as to a possible cause. Not knowing how your phone is even set up makes it hard to hazard a guess. Like I said, I have had zero problems with this phone while running RoB.
I was looking at market reviews of the game, narrowed down to our device, and out of four pages of reviews there was only one mention of a GS2 locking up repeatedly.
What kernel are u using and are u trying to overclock? Because if yer running above the 1.2 ghz stock with no undervolting and doing it for long periods of time I mean....its gonna get hot as hell. But that's kinda expected. Almost guaranteed. And yer gonna experience problems if u continue to push it like that, only because of the amount of stress yer putting on the phone .
"Sent from my SGS2 running AOKP. Open source or GTFO."
You seriously overclock your phone all the time?............... you're just asking for issues. I literally have no advice for you besides saying maybe underclock your phone. what do you possibly need to do that the phones stock clk freq can't handle!?
Sent from my SGH-I777 using xda premium
Would you like being sustained in 113 degrees Fahrenheit? Most likely not. Trust me, your phone doesn't like it either.
Sent from my SGH-I777 using xda premium
Hi. Okay what happened was I got this phone last week. In my country we have a 7 day replacement and 1 year warranty policy. During that 7 day replacement I noticed problems with blue tooth so I returned the phone yesterday and switched it for this phone that I have now. I noticed that specially when downloading big apps from the market my phone tends to run warm, a lot warmer than the last s3 I had. Using battery monitor widget my batt temp was 50 celcius max and using system tuner my cpu temp was 60 celcius max. Is there something wrong with my phone or is it really just that some devices run hotter than others?
Sent from my GT-I9300 using Tapatalk 2
prinzhernan said:
Hi. Okay what happened was I got this phone last week. In my country we have a 7 day replacement and 1 year warranty policy. During that 7 day replacement I noticed problems with blue tooth so I returned the phone yesterday and switched it for this phone that I have now. I noticed that specially when downloading big apps from the market my phone tends to run warm, a lot warmer than the last s3 I had. Using battery monitor widget my batt temp was 50 celcius max and using system tuner my cpu temp was 60 celcius max. Is there something wrong with my phone or is it really just that some devices run hotter than others?
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
its normal buddy, mine rise for 50 also when i'm at my home backyard. it rises for 50 degrees for only about 20minutes and i think its because of the warm weather here in our country. at office where its always cold, i do download 1gb of sd card files for games without the phone/battery temperature rising for more than 43.
just monitor the temperature, if it reaches 45 more then make it cool first before using it again. its still a phone, no fan attached not like personal computers so our only friend is cold weather/place.
kemaro30 said:
its normal buddy, mine rise for 50 also when i'm at my home backyard. it rises for 50 degrees for only about 20minutes and i think its because of the warm weather here in our country. at office where its always cold, i do download 1gb of sd card files for games without the phone/battery temperature rising for more than 43.
just monitor the temperature, if it reaches 45 more then make it cool first before using it again. its still a phone, no fan attached not like personal computers so our only friend is cold weather/place.
Click to expand...
Click to collapse
Thanks for the reply! At least now I'm not worried that I got another lemon.
Sent from my GT-I9300 using Tapatalk 2
prinzhernan said:
Thanks for the reply! At least now I'm not worried that I got another lemon.
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
no problem however i'm not really sure on what will happen if it stays for 50 degrees for a long time. so its better if we can get more replies about others experiences :good:
I'm getting ready to pack in my M8, and I want to go the same size or smaller for under $450 (tops). The Z5c seems to be the only Android phone that really fits that bill while keeping respectable performance, but there are two issues that have me thinking twice: overheating and the "self-cracking glass".
I know nothing can be done about the screen (unless a tempered glass protector helps to keep it intact), but the overheating, if fixed, could sway me away from the Honor 8 or LG G5. I've read that the firmware update that came along with Marshmallow has largely fixed the problem, and combined with a patch available here that throttles the phone a little more aggressively, heat is no longer a big problem. That said, I'm concerned about gimping the performance of the phone in order to keep it from char-broiling my hands. How noticeable is the throttling and, if thermals are still an issue with the phone, how big of one are they?
If you wouldn't recommend the Z5c, the thermal issues remain or the throttling hurts performance in a noticeable way, I'd be curious if there are any other phones (with a micro SD slot) that you think are worth looking at.
Thanks!
Hey , i have my phone from March
this year, 3-4 updates still overheating..
battery top 46C, and cpu 60C MAX so far and stays there,
but! when battery reached 40C+ and CPU 60C+, device become 50% slow (i guess to prevent overheating)
on some games\apps you feel it, some not,
even on anutu cold device is about 90K hot device is about 50K score
after 5 -15 minutes of gaming already from 28 to 43, (depend room temp and game\app) sometimes i can shoot 4K videos for 10 minutes sometimes 1 hour
i think self cracked glass happening because two reasons
1 mainly reason: moving fast from cold when the glass is pretty hot by much (heat cause expanded)
2.sitting on device without notice
ps
sorry if my english is bad
Superrman said:
Hey , i have my phone from March
this year, 3-4 updates still overheating..
battery top 46C, and cpu 60C MAX so far and stays there,
but! when battery reached 40C+ and CPU 60C+, device become 50% slow (i guess to prevent overheating)
on some games\apps you feel it, some not,
even on anutu cold device is about 90K hot device is about 50K score
after 5 -15 minutes of gaming already from 28 to 43, (depend room temp and game\app) sometimes i can shoot 4K videos for 10 minutes sometimes 1 hour
i think self cracked glass happening because two reasons
1 mainly reason: moving fast from cold when the glass is pretty hot by much (heat cause expanded)
2.sitting on device without notice
ps
sorry if my english is bad
Click to expand...
Click to collapse
Thank you! Do you know if the X Compact will run any cooler? The lower power chipset can only help, but I'm concerned about paying $500 for a phone that might not be as powerful as its older brother, which now retails for $100+ less, especially if the overheating and cracked glass issues aren't solved.
If only the Honor 8 wasn't riddled with iOS disease...
you're welcome
As far as iknow for the X compact does not have 4K, slower GPU,(CPU speed is about the same) not water resistant \proof
but he run abit cooler and got more RAM 3 for multitasking
i own only Z5 Compact
X compact base on youtube reviews and reading online
one of many
https://www.youtube.com/watch?v=5-aB-h4OPlE
first, sorry for my english .. i have my z5c about 2 months and i don`t have any problems with overheat .. i think only some devices are afected .. i`m running 6.0.1 rooted .. before i had an xperia z2 and while i play a game (clash of clans) was a lil bit warmer than z5c ..
adryanodej said:
first, sorry for my english .. i have my z5c about 2 months and i don`t have any problems with overheat .. i think only some devices are afected .. i`m running 6.0.1 rooted .. before i had an xperia z2 and while i play a game (clash of clans) was a lil bit warmer than z5c ..
Click to expand...
Click to collapse
maybe hardware defective on some line, i remember every 3 months came new line ver 1 2 and 3 ( i think i have revision 1 or 2) 3 was available but didnt sold here
you can check your temp history somehow? like C3 widget?
or real time small app (shows cpu and batt temp)
maybe you dont play heavy games?
try run antutu 3-4 times see how much score is changing each run ,mine is from 90K to 50K more annoying then overheating himself
I run a few time antutu and i comback with results
Sent from my E5823 using XDA-Developers mobile app
---------- Post added at 04:48 PM ---------- Previous post was at 04:12 PM ----------
Superrman said:
maybe hardware defective on some line, i remember every 3 months came new line ver 1 2 and 3 ( i think i have revision 1 or 2) 3 was available but didnt sold here
you can check your temp history somehow? like C3 widget?
or real time small app (shows cpu and batt temp)
maybe you dont play heavy games?
try run antutu 3-4 times see how much score is changing each run ,mine is from 90K to 50K more annoying then overheating himself
Click to expand...
Click to collapse
here are the results:
Played 10 min`s of strategy game: Cpu temp: 41c Battery temp 35c
then : 1st antutu 70.432 Cpu temp 42c Battery temp 38c
2nd antutu 62.831 Cpu temp 41 c Battery temp 38c
3rd antutu 62.148 Cpu temp 41c Battery temp 39c
anyway , your antutu score is much higher than mine in the first time (i think depends what rom, kernel do you use..) , but like u see, mine didn`t drop at 50.000 in 3 attempts .anyway my max cpu temp was 42c when i run for first time antutu,
Hope i helpt you
yup , thanks
i guess its also depend on the ROM
im using last update stock rom and kernel
ill root my device after my warranty expired
Superrman said:
yup , thanks
i guess its also depend on the ROM
im using last update stock rom and kernel
ill root my device after my warranty expired
Click to expand...
Click to collapse
you are not on the latest antutu 6.2.1. maybe that`s the problem ...
it about the same results with the newer version ill upload later
adryanodej said:
you are not on the latest antutu 6.2.1. maybe that`s the problem ...
Click to expand...
Click to collapse
here, i did now one is 36C and other 40C (the 1st one was right after unpluged from the charger) i let it cool off, and rerun
Superrman said:
here, i did now one is 36C and other 40C (the 1st one was right after unpluged from the charger) i let it cool off, and rerun
Click to expand...
Click to collapse
What rom and kernel do you use? Do you have xposed?
adryanodej said:
What rom and kernel do you use?
Click to expand...
Click to collapse
stock :X i did not root yet
Any S810 device will overheat, it's inherently badly designed. Sony's hardware thermal solution is probably the best any OEM have done with the S810. It's also possible that Sony has optimized under-the-hood settings to further reduce load on the SoC and keep the temperature down.
Other software tweaks are mostly just a balance game of performance and throttling threshold.
Stock Sony firmware goes the more conservative route, so usually you won't experience noticeable heat when using it lightly.
It will still get pretty hot if you use it for intensive tasks that utilizes the full capacity of the hardware, such as playing demanding games, record in 4K for a long period of time, or watch videos that need a lot of complex decoding... etc.
If you're looking for performance without "unnecessary" throttling, just avoid all S810 devices.
Personally, most of the time I had no problems with the temp and perf of my Z5C, but there has been a few cases where I did experience slowdowns due to the throttling.
Got mine from December 2015. After few weeks of usage, it really overheats a lot. After several updates through the months, Device still overheats until now, still uncomfortable to the touch when it overheats. Tried reformatting yesterday, performance seems better with less bloatware stuff and on regular usage. But when cpu is under heavy load, device heats up and performance is reduced a lot to the point that it lags. But overall, still love my Z5C~ <3
It overheats uncomfortably. I tried xpower 4.0 ROM, smarttemperaturex mod, etc although it does reduce heat but not enough to be comfortable and im not talking about heavy tasks I'm talking about Firefox browser, WhatsApp and tapatalk.
The phone is almost never room temperature when using its either warm or hot which gets annoying after some time, don't even let me mention how hot it can get with few minutes of phone calls.
Sent from my E5823 using Tapatalk
I'd say go for X Compact. Zero overheating issues. This heat actually gets on your nerves at one point. While the gpu of X Compact is inferior, in long periods of gaming there won't be any throttling on XC but Z5c will give half the performance so at the end of the day, the X Compact will feel a lot snappier
Sent from my E5803 using XDA-Developers mobile app
It overheats like crazy. I'm flashing 5.1 in hope that it will help.
When running Antutu i put my phone in refrigerator so that I can get a better score! :silly:
Any new cpu is hotter than quad-core of sd800/801 bcoz it's now much faster, even sd820 gets hot during heavy loading though better than sd810.
I've flashed SmartTemperatureX v1.61(no charging bug) and found temp is acceptable and battery life improved a bit.