Helpful Links

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

Re: Galaxy S2 shutting off in idle mode


You have received excessive criticism in this thread, that as you mention is neither constructive or helpful.  But Npl does make a good point.  Your reason for why the thread was marked as "Solved" doesn't make sense.  From the Forum guidelines, Accepted Solution means exactly what it says.  Your explanation of marking it Solved to highlight the status seems it would do just the opposite of highlighting.  Per the forum's description it would bury it, because it was marked as "Solved".


Perhaps what you meant is that it is marked as solved, to notify other AT&T community managers that you are already working on it?  If that is the case I can see how there could be confusion between forum members and forum admins.  The use of "Solved" could have different meanings to the two different groups.

Message 226 of 620

Re: Galaxy S2 shutting off in idle mode

I'm adding my voice to this thread in case ATT cares.


I've had this issue start right at the end of december with the 4.0.4 update.  Previously, my device was great after 4.0.4 every day I find it has gone into sleep of death mode.

I've been desperately checking this forum (every day!) and every other online source for a solution.  I've tried all the proposed solutions (disable att apps, double clock, etc) to no avail. 

My phone is out of warranty, and my contract isn't up so I am particularly !@#$ .  When I called ATT for help, the first agent told me they'd send me a replacement but the 2nd one realized I'm out of warranty, so my only option given was to buy a new phone with minimal subsidy since I'm not due for an upgrade either.  Anyway, I previously loved this S2 and don't want another phone, I just want this one to work again!


So ATT, this is a popular model of phone.  Please know there are certainly many many people out there like me that didn't want to bother to register but are still checking this column and others desperate for a solution.  And getting angry.  Please please please help.


Lastly, checking this item 'solved' just adds to all our frustration. The appearance, rightly or wrongly, is that ATT is being dismissive of this serious problem.  I respectfully suggest you reconsider if it is helping or hurting to have it checked.  Of course, better yet, please get the 4.0.4 issue fixed and leave it checked.









Message 227 of 620

Re: Galaxy S2 shutting off in idle mode

so after the att csr and I did the factory reset on Monday, on Tues I had about 3 SODs. Wednesday none! Today none so far, but  this morning I disabled/forced closed a lot of att apps, I didnt use the phone til after I was at work a few hours and discovered no internet connections. Oopss something I disabled unchecked packet data??

Anyway the att csr is suppose to call me back tomorrow to do a follow up. I'll see what she has to say.

Message 228 of 620

Re: Galaxy S2 shutting off in idle mode

Message 229 of 620

Re: Galaxy S2 shutting off in idle mode

Adding my phone to this pile of 4.0.4 issues. Since December, when that update came out, the phone is having the SODs that everyone's been talking about.


I think normchar in #226 stated the situation well. Is there any kind of time estimation for how long looking into a solution can take (whether a fix is found or not)?

Message 230 of 620

Re: Galaxy S2 shutting off in idle mode

I have had problem since 4.0.4 update... screen won't come on, nothing happens... when this occurs, I just hold down the power button until the phone reboots.

This is my first smart phone... I like it a lot. But I am leaning heavily to the opinion that my future smart phones will not be bought from carriers. It may cost more up front, but I think I will like it better that I am free of carrier's OS and software decisions.
Message 231 of 620

Re: Galaxy S2 shutting off in idle mode

For some resson, my earlier post has been deleted. I just talked to a rep. She said they will send me a replacement. If this problem continues on the replacement, I will have to insist on replacing it with a phone of similar value. I cannot afgord to kerp missing out on getting called in to work.
Message 232 of 620

Re: Galaxy S2 shutting off in idle mode

It seems that the *fix* they said was coming today must not have been communicated to the AT&T CSR's because they're still offering replacement phones. First TonynMisty was told there would be a fix on the 15th, then in the next phone call, TonynMisty is being offered a replacement phone. Are we being placated by some reps?


Is anyone having any different experience with their replacment phones? Are they being sent with 4.0.4?

Message 233 of 620

Re: Galaxy S2 shutting off in idle mode



Its been almost 2 months and it doesn't seem to be moving forward.


Its amazing to see so utter disregard for customer pain and issues. What is AT&T (or for that matter any company) worth without its customers. Not sure what it would take for AT&T to sit up and take notice of this obviously widespread issue.


My phone just shuts down arbitrarily and I do not even know about it. Now that I know this happens, I have started checking my phone often just to make sure its on. Its turning me paranoid day by day and I think I have just about have had it. I am quitting AT&T forever and I will make sure that I do my bit to spread the word and take as many with me as possible.



Message 234 of 620

Re: Galaxy S2 shutting off in idle mode

It has been almost two weeks since I re flashed back to 4.0.3 and the phone has worked flawlessly!!!!! Life is good!!!

Message 235 of 620

Re: Galaxy S2 shutting off in idle mode

I got my call back from Att CSR, when he first called quess what!! phone was asleep..he called me back 30 mins later and thats when I started my rant..he tried to find me a tech center near me, there was none. So then we started talking replacement, phone out of warranty..then talked early that we talked galaxy 3, for 199..heck no...I'll ride the contract out with this worthless phone ...and move my almost 200 bucks a month to another then the s3 came down to 199 with a 99 rebate,,no that dont work for me..I still have to pay 199 out of pocket..I ask how much to buy my 3 phones out of contract...he then got me approved for S3 overnite shipping, and no activation fee..So I quess you can say Att made me happy. He did say a fix is in the works...I hope you all get this resolved soon.

Good luck to you all!

Message 236 of 620

Re: Galaxy S2 shutting off in idle mode

Hmmm... for some odd reason, my post from a few days ago disappeared???


Anyway... update to current status.  Still having random SOD with no predictability that I've detected.  This points CLEARLY to a flaw in the OS or the OS in combination with something else being loaded by Samsung/ATT/??. 


But, just to make myself feel better, I keep trying turning things off or disabling.  So, here is my status as of Friday 2/15/13.


Only turn on when using:




Never turn on:


All Power Saving Options


Disabled Apps:

ATT Code Scanner

ATT Family Map

ATT Hot Spots

ATT Navigator

ATT Smart WiFi

Buddies Now

Clock (the odd extra one)

Dual Clock

Exchange Services


Media Hub



Social Hub

Social Hub (another piece?)



I noticed a couple of Samsung Kies apps installed and running.  I stopped them, but could not disable them.  Kies is a programming MESS.  It is notorious for messing up your PC so wonder if it affects the phone badly too?  I install it only to take a backup before getting a new phone then unistall it on my PC.  Best way to use it.


Let's see if I can make it a day now  Smiley Surprised(

Hope this post survives...

Message 237 of 620

Question on going back to 4.0.3

Terrylmorris posted a few back that he rolled his phone back to 4.0.3 and has had no problems for TWO WEEKS!  WOW!!


Can you post directions or directions to directions for doing that?  Sorry if they are buried somewhere back in the HUNDREDS of posts about this.  If so, please point me to them.



Message 238 of 620

Re: Galaxy S2 shutting off in idle mode

Had 3 random freezes today. It's amazing how I can be using the phone, set it down for a minute and it's frozen. This is really making me hate this phone that I have loved to this point. Any time frame for that update yet AT&T?
Message 239 of 620

Re: Galaxy S2 shutting off in idle mode

Hi Maavalous......Check my notes posted on page 7 of this thread. I used the procedures and software found on They have step by step instructions along with a video of the procedure. I am a novice and I had no trouble. Good Luck!
Message 240 of 620
Share this topic

Learn how you can order the new iPad 9.7-inch with Apple Pencil Support!

Additional Support