Mine's started doing the same since my ICS update. It's on my desk in front of me, so it's not knocking on anything (it last did it about 10 minutes ago). I keep getting lots of generic things (maps, mail etc) force closing since ICS & it seems to me like it force closes and then reboots as if it can't close the app and just resets. Last time was while using Spotify. Time before while using camera. Screen goes blank as if it's locked, but it doesn't respond to home button. Eventually, it'll flash up with the restart screen. Very frustrating.
Got woken up last night by my phone rebooting - a combination of the screen light and the splash screen sound woke me. It had been doing it in a loop for a while before I realised what was going on. Only switching it off completely sorted it.
I had it sitting there, unused (I was asleep) and on charge. It has certainly happened before, often when trying to use the internet - I cannot count the number of times that's crashed the handset. Several times before that, it just rebooted for no apparent reason.
I've only had the thing just over a month, and my HTC desire gave me no such problems over almost two years.
Gonna go back and read the other replies, but factory resetting will be awkward as I'm data limited and I don't wanna run up data charges downloading everything over again.
I've had my SGS2 for a little over a year, and it also started to reboot on its own. The thing also is that when it turns back on my power button doesn't seem to want to work anymore. It doesn't turn the screen on or lock the phone. If the phone is off and i press it , it will want to turn the phone off. I took out the battery and left if out for 30 min. That seemed to work, for a short time. Then it cam back last night. I tried the battery again, but it didn't work. I'm going to try and reset factory and see what happens. If not, then back to BestBUY. Hey I'm paying for that insurance!
I guess the phone automatically rebooted twice in a row. I have heard that welcome sound two times in a row and when I took the phone out of my pocket I see this message that appears immediately when the phone starts up:
Starting Media Scan.
Media Scan completed.
Yes, there was also a big battery drop after the reboot.
I think it was 67% and it became 62%.
Last edited by AmgedIsmail; May 8th, 2012 at 06:02 PM.
Automatic reboot happens for me after a firmware update with the likely cause being a clash of old and new firmware. It didn't happen after a few weeks of use.
As for the pocket, it might be because you accidentally press the power button when you squeeze it while in the pocket. Try leaving it on the table and see if it happens.
I have a same issue since I have updated sgsII to ICS. My phone work fine without sd card. But with sd card it starts slowly and restart before I unlock the screen or restart after a few minutes. It restarts too If I want do something with sd card like open pictures, apps etc. I have 92 apps on sd card, but I cant move them to internal memory, because I have not enough time...==>reboot
(my battery also jumps from 40% to 20% after reboot)
Any idea what to do? I dont want to do factory reset or wipe sd card.
Hi Russel,
I don't think I squeezed it.
It's the first time to happen yesterday.
I had it in my pocket last time and it didn't happen, however I haven't yet used the phone. It is still new I bought it 1 week ago, but still never used it. No Apps, No Updates or anything...
So what about this ICS update?
What is the benefit of the update?
Currently in Settings I see: Android Version:
2.3.5
ICS or Ice Cream Sandwich is the latest Android OS meant to work on both phones and tablets. You don't have to upgrade. Just an option. The real issue is that sometimes there are problems after firmware updates due to clashes. Since ICS is such a big jump, clashes would be more likely I guess. That's why some advice to factory reset before update to ICS.
As for whether you need to update. Its not really necessary. Up to you actually.
As for reboot, since you haven't done anything to the phone, the advice remains the same. Leave it on the table and see if it happens. Its pretty easy to press the power button while in the pocket. Had it happen a couple of times when it was in my pocket and I bend over. One other way is to get a case to protect the button. Then see if it ever resets again.
I left my phone rebooting every 2-5 minutes for 10 hours. When I woke up today I took off SD card and rebooted my phone. Now it seems like I have wiped TW, because my widgets are same like after ICS update. And many apps just doesnt work. So now I am ready and angry for Factory reset and wiping sd card....grr....f**k..
I don't have any idea why would the phone reset by itself!!!!
It is really sad!! because I put all my hope on Samsung!!!
Is Samsung the only phone that does this reboot?
What about Sony Xperia S does it reboot as well?
Sony Xperia S is too heavy compared with SGSII.
It weigh 144 gm.
I really don't want any other phone than Samsung Galaxy because it is terribly thin and not heavy like others, it is really light to hold with my hand, I don't even feel that I am holding anything in my hand
But I think any phone would have its faults/cons.
I even had my iPad while running some games, the game crashes with no reason. I even installed the game from iTunes itself!!!!
Last edited by AmgedIsmail; May 9th, 2012 at 11:04 AM.
I left my phone rebooting every 2-5 minutes for 10 hours. When I woke up today I took off SD card and rebooted my phone. Now it seems like I have wiped TW, because my widgets are same like after ICS update. And many apps just doesnt work. So now I am ready and angry for Factory reset and wiping sd card....grr....f**k..
You cannot just wipe TW of the phone. A factory reset actually restores the phone to factory condition, which means no apps that you downloaded would be there, the interface would be as original and as you pointed out, widgets look the same after ICS update. If its not on ICS, it would look like GB with TW overlay.
Anyway, the fact that you mentioned after ICS updates tells me your problems were likely due to the update itself. Now that you have factory reset the phone, hopefully reboots wouldn't happen again. As for your settings, if you backed them up, you can restore them. Else, you would have to redo it. Apps would need to be downloaded again.
I don't have any idea why would the phone reset by itself!!!!
It is really sad!! because I put all my hope on Samsung!!!
Is Samsung the only phone that does this reboot?
What about Sony Xperia S does it reboot as well?
Sony Xperia S is too heavy compared with SGSII.
It weigh 144 gm.
I really don't want any other phone than Samsung Galaxy because it is terribly thin and not heavy like others, it is really light to hold with my hand, I don't even feel that I am holding anything in my hand
But I think any phone would have its faults/cons.
I even had my iPad while running some games, the game crashes with no reason. I even installed the game from iTunes itself!!!!
Reboots can be caused by many reasons. Incompatible apps, corrupted apps, too heavy usage (can be caused by lousy apps), temperature too high, microSD problem.... But the most common reason is it usually happens after a firmware update. That's because of clashes between the new firmware and remnants of the old firmware.
Updating to ICS would also have higher risk of incompatible apps....
So all in all, reboots happens because of what the user puts the phone through. In normal conditions and usage, I don't think reboot is all that common.
Stock Galaxy S2 reboots itself every 15-60 seconds
Hi all
It's taken several attempts to get this info as the phone constantly reboots itself - it stays on for about 15-60 seconds at a time and is fully charged:
Pull the battery out and leave it like that for 10-15mins, then replace and restart. If the issue persists then you could try a factory reset (instructions on how to do so without access to the UI are here), but this would wipe all user data and reset the handset configuration to an "out-of-the-box" state.
Quote:
else it means buying a new phone which I'm not in a position to do.
If it turns out to be defective you should still be covered either by Samsung's warranty or the Sale Of Goods Act.
I'd done the battery trick and managed to back up the phone ready for a factory reset.
While it was doing the backup, I continued working my way through a load of posts on here and other forum. One suggestion was to uninstall the last app in case you find one that was causing the problem.
The last app was Angry Birds and the one before it Ice Age Village. Uninstalling Angry Birds didn't fix the problem, so I uninstalled the next one and low and behold, my phone hasn't rebooted itself yet.
I'll update this post if the phone doesn't reboot itself within the hour - which would be a miracle!
The phone is still running very hot though - so unsure what to make of that right now.
EDIT:
Phone hasn't reboot once so can only assume it was the last app to be installed causing the problem. Happy Days!!
Last edited by MaxD10128; May 22nd, 2012 at 07:01 AM.
ICS or Ice Cream Sandwich is the latest Android OS meant to work on both phones and tablets. You don't have to upgrade. Just an option. The real issue is that sometimes there are problems after firmware updates due to clashes. Since ICS is such a big jump, clashes would be more likely I guess. That's why some advice to factory reset before update to ICS.
As for whether you need to update. Its not really necessary. Up to you actually.
As for reboot, since you haven't done anything to the phone, the advice remains the same. Leave it on the table and see if it happens. Its pretty easy to press the power button while in the pocket. Had it happen a couple of times when it was in my pocket and I bend over. One other way is to get a case to protect the button. Then see if it ever resets again.
Cheers
I can confirm that the reboot has only ever happened when my phone is sitting on a flat surface, unused.
As anyone got any ideas why this is happening? I'm thoroughly fed up with it.
It's been "repaired" once already and still it happens.
There can be many causes. Apps that don't play nice, microSD card issue or they also occur after firmware updates. Try uninstalling a few of the apps that you installed before the problem.
If you recently updated and it happen after the firmware update, the only method so far (I've read) is to factory reset the phone. You wouldn't lose the firmware, but you lose all your apps and settings. It resets and cleans the phone which hopefully resolves the issue of clashing firmware after updates.
Last edited by Russell Ng; June 1st, 2012 at 11:22 PM.
Oops, thought I had replied here. Since taking the memory card out, I've had no mysterious reboot issues.
The card is nearly two years old and had been used in a HTC desire. Perhaps something lurking on there caused it. I suppose I don't really need one since the phone works without....and the internal memory is massive. For my usage anyway.
Anyone use a memory card with NO problems? I'm wondering if something else will go wrong with the handset down the road
I had exactly this same problem with Galaxy s2. It was as if the battery was pulled out and then it restarted - sometimes the app icons would disappear on initial restart and I would have to restart again. I tried various methods of wedging the battery, removing external sd card, removing apps, etc. - Nothing worked. Took phone to Samsung Warranty store (Pattaya, Thailand) and a tech re-flashed the firmware (2.x.x - don't remember exactly which version). Worked for about a week with no restart but same restarting problem returned. Returned phone to Samsung and they replaced the circuit card inside and reinstalled the firmware (2.x.x). After a week the problem returned. Back to Samsung Store. This time they installed Android version 4.0.3 which I believe is the Ice creme sandwich version. Phone has worked flawless for a month. I believe this fixed it - I'm keeping my fingers crossed.
When I tried wiping my sd card and putting it back in, twice i had the reboot trouble.
That's that then. No sd card for me for the time being
A suggestion would be to check the integrity of the SDCard using your desktop/laptop computer. The wipe function on mobile doesnt seem to do a integrity check, based on personal observation.
If the SDCard fails during an integrity check, it may explain the issue of your phone rebooting.
Oops, thought I had replied here. Since taking the memory card out, I've had no mysterious reboot issues.
The card is nearly two years old and had been used in a HTC desire. Perhaps something lurking on there caused it. I suppose I don't really need one since the phone works without....and the internal memory is massive. For my usage anyway.
Anyone use a memory card with NO problems? I'm wondering if something else will go wrong with the handset down the road
I also had frequent reboots. When I took out my 16 GB SandDisk card (never tried replacing it as I haven't really needed the extra space) they stopped.
I've had a few in the months since then, but they've been very rare, where before with the card in it I was more or less getting daily random reboots.
Really, why is that memory card symbol popping up when there's no card in there??
I put it back in touch test it, as last night I didn't unmount it before taking it out...just in case that was something to do with the reboot. Turned it back on, and the symbol came up!
At this rate I will be looking for o2 to give me a new phone
Thought I'd get through the day without any problems but no.
I occasionally get warnings about kworker from battery stats, and I have little idea what it is apart from the fact it has something to do with the kernel...I'm not rooted btw.
Given the fact that the phone has already been "repaired", And upgraded and it's still happening, I must just have a complete dud of a phone?
My phone has had ICS for about three months now and hasn't rebooted since. Strange when some other people said their problems started with ICS. Anyway I'm not complaining!!! VBG
Samsung really does need to get on top of this problem though - it is obviously affecting many people.
My phone has had ICS for about three months now and hasn't rebooted since. Strange when some other people said their problems started with ICS. Anyway I'm not complaining!!! VBG
Samsung really does need to get on top of this problem though - it is obviously affecting many people.
My trouble started long before ICS., and continued after. Seems I had to sort it myself. I'm encouraged that O2 actually replaced a handset, so should it happen again, they can take this back!
Exchanging my phone tomorrow for a new one with o2. The phone wasn't playing up as badly as before, but crashing randomly, always from idle. Just now it switched itself right off and I couldn't get it back on until I took the battery out. It also took a good few minutes before it would allow me to input my pin number. No amount of typing would bring the pin no up.
Bloody good riddance.
Ps, has anyone ever heard of a sim card causing these problems. That's the first thing that was suggested to me today, a new sim card. WTF??
New phone yesterday. Twice already today has the phone crashed, the same as usual. Really very pissed off and fed up with this. It's fast becoming the worst handset I've ever owned.
No memory card in right now. Really, can a faulty SIM CARD cause these sorts of problems?
The replacement phone I got actually seems worse than the original phone I returned. 3 times in the past day it shut off completely and wouldn't turn back on til the battery was taken out. That's happened about 6 times this week.
Anyone with this problem ever managed to find a permanent solution? If I argue enough with O2 in still doubt they'll let me change handset altogether
This problime hapend to me. And at the first I started testing whay.
after word, I found that when I move the SD out, the phone works ok.
then I started to move all applications from the sd option to the phone.
that fixed it.
then I started to test all application found a lot of uncompatible apps but I left the on, as lone the restarting is now done.
Remove all your apps to the phone, if any of them is on the sd. and check will it fix it or not.....
Turns out the problem could well be Juice Defender. On my third phone, and installed all my usual apps the first day. within an hour of updating everything, off it went. I since read comments on market that others have had problems with JD. So I won't be installing that again.
However I did have a shutdown after I had trouble connecting to wifi a few days later. I've seen others over on XDA with this problem. Some have commented that anything that tries to control wifi behaviour/access will result in this problem for some phones. Looks like all of them in my case.
I've rooted my phone, and have been wary of wifi connection problems at home, and since last Friday, I've not had a reboot issue once.
Just found this thread to ask if anyone has found out solution what is wrong with the phone when it's doing this random rebooting? I've had S2 for month now and I'm so pissed with this phone for freezing and then rebooting (I think watchdog will reboot it when it is not responding). I can't seem to find any obvious reason why this happen. I've done hard reset and emptied cache... Sometimes there might go day that it doesn't and sometimes it reboots every ten minutes or so. It sounds to me that it has defect ram memory. If it tries to use that defected part of memory it freezes.
I brought it back to dealer and they sent it to repair. As this issue is hard to reproduce I think they just reinstall firmware and return that defected phone.. We'll see.
Edit: I don't have external SD card, Android version 4.0.4, Certainly I'm not pressing power button when this occurs.
Last edited by Corni; September 5th, 2012 at 12:11 PM.
Definitely factory reset is not the solution as I had tried doing it 2 times and still the problem recurred. It could be the problem of the firmware version which render it invompatible with certsin apps
Before the phone reboots I get a popup box which says: Because google's limits, The following apps cannot be killed. Please click to force close from application info. It then lists one to three apps (variable names each time but mostly yahoo mail and yahoo messenger are listed). I do have over 300 apps on my SD card and have removed listed apps when I get the chance. When SD card removed phone is ok but only phone apps available. So it is a random reboot when SD card is in. Left it a couple of times plugged into charger in a cool place - it rebooted over 1000 minutes before stabilising! RANDOM
Last edited by Andytea; October 15th, 2012 at 09:33 PM.
Just to chime in on this. My S2 is running 4.0.3 that I updated it to about a month ago or so. I bought it on the first of September but it was second hand so I dont know how old it actually is. It had 2.3.3 when I bought it.
Last week on Wednesday, it rebooted 4 times when I was at work in the space of about a half hour. I switched it off for about an hour and that seemed to stop it. Unfortunately it did it again 5 times on Friday night and it was sitting up on a table when it did it this time so it wasnt any buttons being pressed that caused it.
It really took a dive on Saturday morning though. The story is in this thread... Galaxy S2 issues.
...so I had to do a factory reset. Hopefully that killed 2 birds with the one stone as it has been behaving itself since.
My device, the S2, reboots out of nothing even when left alone on the table. Updated to ICS, no changes. So, I performed a factory reset (which to my surprise didn't restored the original Android 2.x version but the ICS one I've installed before). During the factory reset I choose to not reinstall any of the app I had and I choose to format the SD card.
I used the phone for two days and no reboot. Before they happened several times a day. So, I installed my first app, the Dolphin browser and all ok. A couple of days later I installed google reader and the phone started to reboot. Uninstalled it and the reboots are gone. A couple of days later I installed dropbox and reboots again. Uninstall, once more.
Before the factory reset I had notice already that any time I installed dropbox, things went bad, so again this was the scenario.
So far, I have detected two app that were crashing the phone. Let's see how it goes. If any body has feedback, please post it.
Last edited by tux1968; October 30th, 2012 at 10:44 PM.
This thread seems to be a good place to get my own frustration out on the reboot problem. I will add some details so you all might benefit from that.
I have owned my Galaxy S2 for over a year now and have experienced several firmware versions. I ran on 2.3.4 for a while without any big problems. I got a little obsessed by maximizing the batt life so I played around with Juice Defender and Juice plotter and got some good results. Side effect was that I noticed weird behavior immediately since I was focussing on my battery drain and what programs were responsible for that. Juice plotter is very useful here.
What I noticed on that firmware version was that my phone sometimes got into a state that drained the battery quickly. As a reference:
Normal: battery could last 48 hours with moderate use
Charging rate: 25% per hour
Abnormal discharging: 10% per hour with no clear apps causing this (phone idle)
I also noticed during this abnormal drain the phone would get really warm. Not sure if that is the battery or the CPU. I am guessing the CPU.
It seemed like such an episode started when I got a phonecall when my phone was on the charger. Like something went wrong during that combination. A manual reboot usually solved it and battery drain went back to normal.
I accepted this behavior and lived with it for a while.
So, then ICS came about. I waited with the upgrade due to a lot of issues on the web. Thought a little legging behind wouldn;t hurt.. Finally, I decided to upgrade and did it the clean way: factory reset.
That was quite some work since all my apps were gone, all my settings were gone and I didn't want to re-use any restored settings when they were offered.
After the upgrade, I think it was 4.0.2, I immediately had serious problems with my phone and battery drain. My phone regularly was 'dead' when I tried to use it. I could reboot it after holding the power button for a while (5 - 10 seconds). I am guessing this is hard reboot like any normal PC, usefull when it 'hangs'.
When looking at Juiceplotter, the battery level made huge jumps, where the level changed by 30% within a short time (hour or so) and the phone was off. At least that is what it looks like because Juiceplotter is not logging any information so that part of the graph is unavailable.
I removed the battery as a last resort and... it seemed to solve the problem. My phone ran for a week with normal power behavior.
Soon after I solved this I got 2 other upgrades pushed on my phone and ended up with the current 4.0.4. version. Since then (2 months), the behavior has been erratic in waves. Sometimes it runs fine for several days, sometimes it dies twice a day.
During normal operation the battery drain is very good (=low). ICS definately improved when everything is working as it should. As a benchmark:
Battery lasts 72 hours.
Usage: 5 hours of GPS, 4 short phone calls, regular e-mail check.
JD ultimate settings: ping on 30 minute interval, auto connect WIFI at home and at work, nightschedule 00:00 - 07:00
However, when things go wrong it totally sucks! The behavior is always the same:
- Phone seems dead when pushing the home button or power button
- Long press (5 - 10 sec) of the powerbutton forces a reboot
- The phone feels warm to the touch, some process is draining battery fast (20 - 30 % per hour).
- After the battery is dead, in 1 - 3 hours depending on your starting level, the phone obviously is not warm anymore, does not wake up when long pressing the power button and the only solution is to put it on the charger. This will show a battery level of 1 or 2 % with a warning 'critically low'.
- When looking at Juiceplotter, the graph ends after an 'idle' period where battery drain is very low. Then it starts again at the point you have revived it and there is a huge uncharted drop in battery level.
- When looking at the battery stats of android, there is sometimes an app that jumps out with its battery usage. It is never the same app though and de-installing it does not solve the problem.
My conclusion:
- ICS has a serious bug that is not caused by a clash of old firmware leftovers.
- The bug has been there from the first version of ICS.
- The bug seems to freeze random background processes on the phone and causes the CPU to work overtime and use a lot of power.
- When the battery is not fully depleted, a hard reboot helps (long press power button).
- After the battery is fully drained, only recharging will revive your phone.
- During the 'freeze' period the OS totally 'hangs'. None of the apps are able to log anything anymore and it looks like the phone is turned off.
So no solution from me, maybe some piece of mind that you all are not crazy.
The Galaxy S2 (sometimes known as the Galaxy S II) is the follow up to Samsung's widely successful Galaxy S lineup. This time, the Galaxy S2 raises all the stakes and Samsung has found a way to double almost every spec in a true, one of a kind ... Read More
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Sgsii reboot
