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Galaxy S2 shutting off in idle mode


Galaxy S2 shutting off in idle mode

Recently, I noticed that my phone shuts off while in sleep mode. This just happens when I don't check it for a while and the display is turned off. When I do go to check my phone, it's unresponsive, even if I hold down the power button. So far, I've had to remove the batter every time this has happened in order to reboot it.

I just don't get what the issue is. I'm probably missing phone calls because I'm not even aware that my phone is turning off. I feel like after the ICS update my phone has had issues. I already performed a factory reset last week since I was having a problem with the notifications not ringing and vibrating, and now, this is happening on top of that. 

If anyone has any suggestions, that would be greatly appreciated.

I have a Samsung Galaxy S2 i777.

Oh, and another thing, I noticed that my batter is at 95-100% before it shuts off by itself, and once it boots up again it's down to 85-89%. I also feel like it might be an issue with overheating: I noticed that my phone feels hot after I've been using it for a while, like texting or using the internet, and then I set it down to do other stuff when I notice that it's turned off. My phone usually feels really hot too, and the case I have for my phone probably does not help either. 

Message 1 of 620

Accepted Solutions
Former Community Manager

Re: Galaxy S2 shutting off in idle mode

Hey all, 


As some of you have already noted, an update is available for the Samsung Galaxy SII. 


The update includes fixes for devices that may become unresponsive and/or power down while sitting idle on rare occasions. It also enhances security to protect against malware vulnerability. You will receive a notification on your phone to update. 


NOTE - You must have updated to Android version 4.0 to receive notification of the new software update


As of May 1st, I am no longer serving as the Community Manager for AT&T. This account will no longer be able to accept private messages.

Did a post have a solution that worked for you? Help other people find solutions faster by marking posts that helped you as an "Accepted Solution". Learn about accepted solutions here.

I am an AT&T employee and the postings on this site are my own and don’t necessarily represent AT&T’s position, strategies or opinions.
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Message 521 of 620

All Replies

Re: Galaxy S2 shutting off in idle mode

Just curious has anyone posted anything on AT&T or Samsung's Facebook pages?  They may have more people looking at these than this forum.  


Also, if you decide to root, look hard at Shostock3. Its Jelly Bean and his latest update is flawless as far as I can tell. I used the stock 4.0.3 for a while, it was ok, no SOD's but battery life was not as good as Sho3 and nor was the speed.  

Message 496 of 620

Re: Galaxy S2 shutting off in idle mode

I'm loving the AOKP Task650 ROM. Excellent.

Message 497 of 620

Re: Galaxy S2 shutting off in idle mode

I just had a random AT&T satisfaction survey pop up.  Of course I accepted. Smiley LOL

Message 498 of 620

Re: Galaxy S2 shutting off in idle mode

I also filed a complaint with the BBB and got a return call from AT&T (Stephanie). She also fed me the same crap lines Npl got. I keep pushing and was able to get a new GS3 for free. Don't give in and stand your ground. Remember, it's AT&T's fault.

Message 499 of 620

Re: Galaxy S2 shutting off in idle mode

Nothing. Is. Ever. AT&T's. Fault. Just keep repeating the mantra. After all, if you hadn't signed that contract, you would not be having these problems! Smiley Wink

Seriously, you'd think somebody here would have an "in" with a tech journalist who might find this story interesting. Just a thought.
Message 500 of 620

Re: Galaxy S2 shutting off in idle mode

Well another SOD. And when I turned the phone back on I lost over 20% of the battery. This is ridiculous.

Message 501 of 620

Re: Galaxy S2 shutting off in idle mode

My latest chat session with Samsung support:
Mikayla: I've checked the information and I would like to inform you that the next update for your phone would be Jelly bean 4.1.1. This update is not yet released for your phone as of now. Please keep checking link mentioned below to know anytime if this update is available for your phone:


Message 502 of 620

Re: Galaxy S2 shutting off in idle mode

I just went to your link and checked it out. As I was laughing I scrolled to the bottom where it asked, "what did you think". Of course I rated very dissatisfied. Then in the comments explained that there were over 500 posts in this forum with people with the SOD from the 4.0.4 update and to please either roll it back or give us a real update! Everyone should reply to this, maybe Samsung will do something if there are more complaints but I doubt it.
Message 503 of 620

Re: Galaxy S2 shutting off in idle mode


I even asked him for Alphe, Beta or prerelease. I was ready to sign for tester. I dont think it would be worst that 404.

BTW this is the first chat support person who gave me information. Before the answer was "try factory reset, is your battery original, clear your cache" .

Message 504 of 620

Re: Galaxy S2 shutting off in idle mode

I just received an email from ATT that said an update will be pushed OTA tomorrow.
Message 505 of 620

Re: Galaxy S2 shutting off in idle mode

An update pushed out tomorrow... right, and the check is in the mail.  From all the experiences I've had... all the way to the "Office of the President"... ATT is going to do NOTHING to help THOUSANDS of customers.  For me, ATT is now like a cheating wife, you'll never believe another word you hear.


Oh, did they say which tomorrow... this year, next... the tomorrow they told people last year???  Smiley Surprised)


FYI, Office of the President is just another name for some phone room where the people are mushrooms and just do what their script says... over and over... no matter what you say. 


GO T-Mobile!!  I'm going there as fast as I can!!

Message 506 of 620

Re: Galaxy S2 shutting off in idle mode

Well this is the first time they've said something like "tomorrow". Maybe this means something?

Message 507 of 620

Re: Galaxy S2 shutting off in idle mode

I have been following this thread for so long and have not seen anything that completely solves the problem. I have tried disabling AT&T apps, teaking WIFI with specialized apps, uninstalled all possible apps (making my phone practically dumbphone). While doing all those things certainly improved battery life the problem of sleep of death (random shut down) persisted.


This is a serious problem and being frustrated I decided to give flashing a try. The process isn't that complecated, read one page of steps on cyanogenmod and installed the latest CM10.1 and my god, the phone has become at least twice as fast. Battery life is improved, all the apps look more beautiful and work perfectly.


Installing custom ROM on your phone is risky, but with the crap firmware isn't it already horrible enough? So if you can not convince AT&T to give you an S3 this is probably your best bet.

Message 508 of 620

Re: Galaxy S2 shutting off in idle mode

Message 509 of 620

Re: Galaxy S2 shutting off in idle mode

So I can stil root/flash my Gs2 even tho its no longer activated with ATT?

What if an OTA is releashed tomorrow, is there a way for me to get it since the GS2 is no longer activated?

is it OK to use my sim card from my GS3 in the GS2?

I havent figured out what I'm gonna do with the GS2, I want it fixed, rooting seems complicated to me...I wish some of you guys were close to me I would sure beg an plead for ya'll to do it for me.
Message 510 of 620
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