Galaxy S2 shutting off in idle mode

Contributor

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 (56,693 Views)
Mentor

Re: Galaxy S2 shutting off in idle mode

Yes, there were some replies on other threads where they said after they rooted they didn't have the problem. Maybe someone that has rooted theirs will chime in here.
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Teacher

Re: Galaxy S2 shutting off in idle mode

Message 77 of 620 (4,822 Views)
Tutor

Re: Galaxy S2 shutting off in idle mode

The site below has links to reflash 4.0.3 to Galaxy S2 I777:

http://galaxys2root.com/att-galaxy-s2/how-to-unroot-to-official-ics-on-att-galaxy-s2-sgh-i777/

I did this a little while ago, and so far, it's on 4.0.3, NOT 4.0.4

Hope this helps!!!

Message 78 of 620 (4,781 Views)
Highlighted

Re: Galaxy S2 shutting off in idle mode

I have been having the same problem since I upgraded to android 4.0.4. I have shut down an app called Sim Toolkit. I had to do it by holding the home button until the list of recent apps came up. I swiped it off the screen to shut it down. Since shutting it down I have had 1 sleep of death in 5 days. I have discovered that the app will reactivate itself after a certain amount of time (a real PIA). Now I regularly check to make sure that it is not running. If it is I shut it off again. I do not see an option to disable the app in settings, or else I would do it there. I hope this may help. I will keep posting if the problem reappears.

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Voyager

Re: Galaxy S2 shutting off in idle mode

It's been 4 whole days since I got 4.0.3 reflashed on my phone by AT&T. I have not had a single abnormal shutdown and battery life is back to normal, but I never encountered major issues when my phone was on 4.0.3, so I don't know if this helps those of you who have had these issues since gingerbread. If your issues started with 4.0.4, it would probably help to somehow get your OS back on 4.0.3 - either officially through AT&T or doing it yourself with the link posted above.

Message 80 of 620 (4,749 Views)
Scholar

Re: Galaxy S2 shutting off in idle mode

My S2 after grabbing a bunch of ATT updates from the google app store started randomly turning off. The device was working fine before the updates on 4.04. I just unistalled all the updates on the att apps, and hopefully the device will stop powering off with the battery being half drained as already reported. 

Message 81 of 620 (4,650 Views)
Mentor

Re: Galaxy S2 shutting off in idle mode

[ Edited ]

See message #70.

Forgot to mention that my phone no longer auto-syncs with my bluetooth home phone. I have to do it manually.... constantly, because the phone keeps shutting itself off more and more often recently and it has to be re-synced with every reboot.

 

Let's all call AT&T and ask them to push JB and make sure these issues are addressed in the JB update.

Message 82 of 620 (4,634 Views)
Scholar

Re: Galaxy S2 shutting off in idle mode

Just an update that my S2 is no longer randomly shutting off or having the half drained battery issue after I unistalled all the recent updates to the ATT apps. 

 

Do not allow your S2 to update any build in ATT apps (ones by ATT) as the ATT apps seem to be the issue (at least for me) that caused the random reboots on the device with the battery issue.   My handset has been working great for almost 24 hours since i unistalled the updates for ATT apps!  

 

 

Message 83 of 620 (4,548 Views)
Mentor

Re: Galaxy S2 shutting off in idle mode


desiguy wrote:

Just an update that my S2 is no longer randomly shutting off or having the half drained battery issue after I unistalled all the recent updates to the ATT apps. 

 

Do not allow your S2 to update any build in ATT apps (ones by ATT) as the ATT apps seem to be the issue (at least for me) that caused the random reboots on the device with the battery issue.   My handset has been working great for almost 24 hours since i unistalled the updates for ATT apps!  

 

 


Give it more than 24 hours and get back to us. I had already uninstalled all updates to all ATT apps weeks ago. The phone still randomly shuts off and no longer auto-syncs to my home bluetooth phone. It was all working great with long-lasting battery power (when not playing games), until the OTA ICS update from 4.0.3 to 4.0.4 in December.

Message 84 of 620 (4,525 Views)
Mentor

Re: Galaxy S2 shutting off in idle mode

I reflashed my phone back to 4.0.3 late Saturday night & rooted it.  Almost 24 hours later I have had zero shut downs.  Monitoring the battery to see if it holds up as well as it did on 4.0.4, but I'd rather have to recharge than my phone be off and not know it.  Will report back in a day or two how this is going.  

Message 85 of 620 (4,521 Views)
Scholar

Re: Galaxy S2 shutting off in idle mode

So hows the fix working for you?

Message 86 of 620 (4,422 Views)
Mentor

Re: Galaxy S2 shutting off in idle mode

48 hours in and no shut downs at all.  My battery is showing 89% and has been running since 6:15am this morning.  So right now, I am loving my S2 again.  

Message 87 of 620 (4,421 Views)
Scholar

Re: Galaxy S2 shutting off in idle mode


ablan59 wrote:

48 hours in and no shut downs at all.  My battery is showing 89% and has been running since 6:15am this morning.  So right now, I am loving my S2 again.  


 

Where did you get the 4.03 stock rom at?

Message 88 of 620 (4,416 Views)
Scholar

Re: Galaxy S2 shutting off in idle mode

I took my phone back to an AT&T Device Center and they flashed it back to 4.0.3 from 4.0.4. I'm back to my original problem where wifi wont reconnect after sleep, but that's far better than having the phone "die" in its sleep!

What a HUGE disappointment this all is. It takes AT&T 6 months to cr@p up a new Android release and then they fix one thing and break another. I'm sure version 4.0.7 will fix the "sleep of death", but probably at the expense of breaking the transmission of all data, or something equally trivial (:rolleyes). Sigh.
Message 89 of 620 (4,372 Views)
Mentor

Re: Galaxy S2 shutting off in idle mode

Scroll up on this thread and you will see a post with the details. I tried to post it but evidently the moderators here didn't like me posting.
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