yashsingh1/xdaforums huggingface dataset:
[Galaxy S II Q&A, Help & Troubleshooting] shaharudeen:
rebooted again

CORRECTIOn: after about 5 days of no reboots, it rebooted once today

this time, it rebooted while i was using my phone, before this it rebooted in my pocket.

i was closing dolphin hd browser, then instead of pressing whatsapp shortcup i accidentally pressed on dolphin hd shortcut, it went blank, n rebooted ,,,samsung logo came up and the routine thing...

hmmmm,,,, i had alogcat installed, but early i didnt have a timestamp, i just changed the setting to have a time stamp, will post the log if it ever happens again.. hopefully someone can help me to interprate... sadly i can reproduce the reboots,,, its random, and not frequent.. i gotta wait...
[Galaxy S II Q&A, Help & Troubleshooting] relikade:
This is crazy, i have an SGS2 and so does my wife, she has more problems with hers than me so last night decided to swap them incase it was our setups, well so far its been 16 hours and hers has been fine but i just had a reboot, its just sitting in the same spot asleep on my office desk and has been for hours.

All i have is my google account setup, no apps, no sd card.

No alternative than to send it in for repair which Samsung told me would take at least 3 weeks!!

First and last Samsung phones we've owned :mad:
[Galaxy S II Q&A, Help & Troubleshooting] amitx224:
exactly same thing happened to my galaxy s2 also. on the very 2nd day I had to remove the battery in order to start it!! I can't believe it is happening with my galaxy s2. earlier I use to have this ****ty restart problem with my Nokia n8.
[Galaxy S II Q&A, Help & Troubleshooting] TAEL:
So you mean it is a problem which is made by SD cards?
[Galaxy S II Q&A, Help & Troubleshooting] racer211211:
it seems to hava more than one reason for rebooting

1. broken data on sd or internal storage .... like broken data .. photos.. mp3s... in windows making your explorer crash .. try just to make a hard reset and erase the sd .... and watch then ...

2. an official bug in the galaxy s2 which makes the phone reboot or just go off ....

which is being worked on

3. a real hardware failure .....

my had smae issues until i erased the cartd etc... but few days later reboots came back ... even though not as often as before ....

---------------------------------------------------------------------------

i also realized, that my phone went off when being shaken e.g.

http://www.youtube.com/watch?v=fd2-fEJZX3k

two days ago i knocked on the backside and it went off and did not want to go on again ....

i sent it in to samsung for repair ....

if you have similar issues... just send it back ... it was tooo expensive to be faulty....
[Galaxy S II Q&A, Help & Troubleshooting] NuckinFutz:
I'm not sure it's the sd card, I had the problem with first g2 but new one is fine and I'm using the same card. I would definitely recommend formatting though.
[Galaxy S II Q&A, Help & Troubleshooting] dannyboyp:
solved

Hi...

I have had the same problem with the phone rebooting and switching its self off.

I tried everything from reformating sdcard to internal roms/radios and it turned out to be the battery did not sit correctly in the compartment. I played around testing the phone and could replicate the issue. The battery was not manufactured correctly and seemed to be shallower in height where the battery contacts were (the black trim on the battery look slightly curved against a new battery i had). when moving the battery several times with small vibrations the phone would shut off or reboot. Its such a small amount it could go missed. I used the new battery and have had no reboots or shut downs....

I Hope this helps :cool:
[Galaxy S II Q&A, Help & Troubleshooting] amdaley:
I've had this problem a few times in the past week as well. Took the phone out of my pocket & it was off. On another occasion I took out the phone & it was booting up. These have happened a few times now.I took out my SC card as it may have a problem.

If I plug it in to my PC it doesn't load.The light on the card reader blinks but nothing happens.I also tried the card in 2 cameras.The first one said "Check the SD card" The 2nd camera loaded the card ok.

I will leave the card out of the phone & see what happens.
[Galaxy S II Q&A, Help & Troubleshooting] Teddybear2:
I had the same problem with my device (T-Mobile). Seems to be a software problem. Just sent it back and got a new one. Problem was solved.
[Galaxy S II Q&A, Help & Troubleshooting] xhighway:
Mine started rebooting after about 10 days of use. And it happened right after I have installed a batch of apps and moved some of them to the SD. Symptoms looked like:

1. In the first place I have received a call and after taking it I couldn't hear a thing as well as the caller couldn't hear me. The phone showed "no card/network" sign after I dropped the call and wouldn't call saying that I don't have a sim card until I hard rebooted (take the battery out and put it back in). This happened a couple of times.

2. Then I noticed that at some point in time the sound on the device disappears completely and I can't make any calls as I can't hear anyone at the least. Later I have found that sometimes even though system sounds disappear, I still can make calls in some cases.

3. Then it started rebooting randomly without any visible pattern.

I have moved the apps back to phone, but it keeps rebooting. Already happened like 4 times today.

I do not believe this is because of some hardware issues though, looks much more like software thing to me. I'm on stock software and don't really want to root as I'm a bit tired of this after playing with G1 for years :)

Following from this, could someone please help with these 2 questions:

1. How do I factory reset the thing? Is it possible on stock firmware?

2. When trying to update (Settings>About Phone>Software Update) I'm getting "Connection Failed" error. Couldn't find anything on the forum about this.

Thank you.
[Galaxy S II Q&A, Help & Troubleshooting] ND47:
Hi,

I don't know if the problem is software or hardware related.

I have tried fw KE2, KE7, KF2, litening rom 1.5, KG2 and the problem is still there.

With or without sd-card, even with a clean install with hardware reset and no app installed the phone rebooted many times a day.

I sent it to Samsung RMA it came back after 2 weeks with a new battery but the problem was still there... I just sent it back to RMA... Again...

I noticed that it does not happen when the phone is charging.

If this problem is linked to software, I'm really disappointed about samsung, since many firmware version came out and no correction until now for this bug :mad:
[Galaxy S II Q&A, Help & Troubleshooting] xhighway:
no reboots for 24 hours

I have moved all the apps back from SD to the phone, unistalled apps that could have caused the problem (mine started rebooting after I installed a few apps and moved some to SD). And I don't see any reboots within last 24 hours.
[Galaxy S II Q&A, Help & Troubleshooting] ND47:
Great :)

To summarize what I've read on different topics, I think we can attribute 3 different root-causes for these reboot:

1) The battery mechanic design issue (when the phone is shacked it reboot)

2) The sd-card issue (happens often when a file is corrupted into the sd-card)

3) An unknown cause (mine, unfortunately) which makes the phone rebooting rarely for some people, very often for me...
[Galaxy S II Q&A, Help & Troubleshooting] amdaley:
I am now on my third day since removing what I think is a defective SD card & no more reboots that I can see. I have a new card ordered which should be here in a few days.When I install that we will see what happens.
[Galaxy S II Q&A, Help & Troubleshooting] xhighway:
My devices had just rebooted after about 32 hours of normal behaviour. I have started recording reboots to see if it will be possible to identify any patterns.

Any suggestions what I should be recording apart from the times/dates?
[Galaxy S II Q&A, Help & Troubleshooting] xhighway:
Social Hub?

I have just had a reboot. I picked up the devices from the table and it was extremely hot. I have rebooted almost instantly after I passed the stand by screen.

I looked at battery usage and it appeared that social hub used 30% of it which looks very weird to me. Did anyone experiment with Social Hub at all? Or how many of you seeing spontaneous reboots are using Social Hub or at least configured it to pick up your social profiles?
[Galaxy S II Q&A, Help & Troubleshooting] arabbitte:
I never used social hub and had the reboot issue. I have used the device in various scenarios (e.g. Co-Pilot and diagnostic software) where the device was being well used with both screen and cpu temps elevated but without issue. My problem was rebooting when the phone was doing nothing.

Anyway, it's gone back for replacement.
[Galaxy S II Q&A, Help & Troubleshooting] amdaley:
No more reboots since over a week ago.I put in a new 8GB SD card last night & loaded a load of stuff on it including avi videos. I also loaded QQ Player to play the avi files so we'll see how it goes.
[Galaxy S II Q&A, Help & Troubleshooting] xhighway:
Social Hub?

On the day of my previous post I forced stopped 2 Social Hub processes, removed social hub accounts and replaced them with external apps (FB, twitter, etc.) and then updated the firmware via Kies. No reboots since then or any glitches.

I can't guarantee it's the root of all evil, but it definitely helped me.
[Galaxy S II Q&A, Help & Troubleshooting] khosronejad:
my phone gets new problem each day and any further i go it get worse.

first i couldn’t connect to Vpn sometimes. i thought it may be personal problem.

then it got reset randomly with no reason. i didn't notice.

then it didn't recognized by computer and randomly didn't get charged.

today when it goes to standby mode it light up after few seconds and if i try to put it back in sleep mode by pushing power bottom it gets freeze and hang up.

Even when I turn the phone off sometimes it turns on by itself and after booting goes to car mode

Does have anybody similar problem?

I searched and found this (copy following line to address bar.. xda didn't let me to put a URL)

phonesreview.co.uk/2011/05/31/samsung-galaxy-s2-problems-by-users-discussions/

so it’s not just me.

Could anybody help me?
[Galaxy S II Q&A, Help & Troubleshooting] j0rd:
I just got my GalaxyS2 (i9100T Model) yesterday.

I noticed when the gal at the store unboxed it to set up some things, when she left it idle, the phone rebooted. This happened twice at the store. I assumed it might be related to the battery, so I paid it no mind.

At home, I played with a phone quite a bit and it wasn't rebooting, but if I left it idle, it would occasionally reboot.

Today, it's rebooted during two calls and a couple times in my pocket.

When I say reboot, the phone actually turns off and I need to restart it.

I'm going to be taking back my phone, but not because of this issue. I pre-ordered a GalaxyS2 as I was looking forward to doing some NFC related development & because it had quad-band 3G. I bought it from a carrier in Thailand called TrueMove. It turns out the Thai models which were imported as a i9100T model, which I can find very little information about (links would be appreciated). This model does not have NFC and the Quad-band 3G is software limited (although I have not tested this out yet).

I had a GalaxyS previously and have been fairly happy with it. The only reason I got the S2 was for the 850Mhz+900Mhz Band + NFC and since my phone can do neither, I'm just going to attempt to return it and get my money back. Quite un-pleased with this whole situation after dropping $635 USD on a phone that does nothing I wanted it for.
[Galaxy S II Q&A, Help & Troubleshooting] skartas:
It is hardware related. Just tighten the battery using some pieces of paper. It will be solved. Worked for me.
[Galaxy S II Q&A, Help & Troubleshooting] arabbitte:
Works for some but not for me - I tried this on my phone and it kept on misbehaving.
[Galaxy S II Q&A, Help & Troubleshooting] fpiret:
Reboots

I got the same issue, my phone simple reboots when I listen to MP3, also it reboots when I install some apps from the market. I guess it's not an isolate issue here... but pretty pretty annoying!!!
[Galaxy S II Q&A, Help & Troubleshooting] :
Reboots only occur when playing music- both via speakers and 3.5mm jack

Not a full reboot

It's unlikely that the SD card is corrupted as it worked fine in my Hero before, and also quite a lot of people are experiencing this issue

Someone should call Samsung- I nearly threw my phone at the wall last time I spoke to them, so I don't wanna do it

It's unlikely that this is a battery issue- 3/4 when this happens, my phone is lying more or less flat

Hello. After I probably fixed the excessive data usage issue, I decided to fix something else and started reading this topic. Here's what I can add on this issue:
[Galaxy S II Q&A, Help & Troubleshooting] xZeDgEx:
This is similar to my experience. Usually happens when listening to music. Phone is flat on desk. I have no external sd card installed. It did actually happen this morning while the phone was sitting on my bed side table, i heard the chime when it restart was not using phone though.. This is getting annoying now..
[Galaxy S II Q&A, Help & Troubleshooting] JimmySG2UK:
Hi

Ive only had my Galaxy S2 since June, amazing phone btw, and ive seen it reboot itself atleast 3 times. I have done what you suggested and crossing my fingers. I would like very much to not have the need to take it back.

Thanks

I am also an iPhone to Android Convert. I have seen the light.:)
[Galaxy S II Q&A, Help & Troubleshooting] JimmySG2UK:
I was told that if you leave phone running for long periods it affects the RAM. so best to reboot it yourself every couple of days.
[Galaxy S II Q&A, Help & Troubleshooting] lucienuk:
Mine reboots when I am on a call or when I am calling someone. It happened 10 times in one day! Took it yesterday for repair. It all started when I took a photo and it shut down.

My cousin works for samsung support and she told me that it could be from flying. I was recently on vacation and it all started after the flight. She said that samsung has had problems with other products and pressure difference from flying.
[Galaxy S II Q&A, Help & Troubleshooting] xhighway:
Guys, the update via Kies and removal of Samsung Social hub stopped my reboots completely. Haven't had a single one since than (a month or so). Try that, seriously.
[Galaxy S II Q&A, Help & Troubleshooting] Syrellaris:
Reviving this topic for a bit.

Had mine since early last week, and since this weekend its been doing random reboots. Its totally random too.

I haven't installed my apps on it yet, but I did flash CF-root onto it. Ill restore it to stock and see again later, but im wondering if my SD card can be the cause, even though it does not really use it. I have nothing on it yet.

random reboots happen when I press home button sometimes, sometimes when booting up gamehub or social hub, sometimes when just laying there in lock mode etc. Can't really pinpoint it to something atm.

Could this be defective ram on the phone itself? If so, how exactly do I do the adb logcat stuff? I never seem to be able to run adb shell or logcat at all, not even in the folder of the android development kit.

Sy.
[Galaxy S II Q&A, Help & Troubleshooting] plazzTT:
I can also confirm I haven't had this problem in over a month.

I've only been using Samsung ROMs, can't say which one exactly got rid of the problem. KH1, KH3 and probably some of the later KG releases were fine for me.
[Galaxy S II Q&A, Help & Troubleshooting] xZeDgEx:
The weird thing with this is it only happens when listening to music and now it only happens when I am at work. Phone is sitting flat on desk. I can listen to music in the car and this does not happen... Very strange.
[Galaxy S II Q&A, Help & Troubleshooting] mreboucas:
Samsung Galaxy S2 rebooting

I have the same problem, and it happens just when I listen to the music with my headphone plugged, but if I'm using a Bluetooth phone it doesn't happen.

I'm going to a Virgin Mobile store to try to fix it.
[Galaxy S II Q&A, Help & Troubleshooting] Elpacosv:
hello every one, I change a phone 2 weeks ago because of this problem. Since I have the new phone every thing was going well until 2 days ago. I have an I9100MUGKG2. The phone slip my hands and fall, nothing serious. Since that event the phone rebooted went I was listening to music. After that reboot I rested the phone and formatted the SD card. Sadly, today it rebooted after a bench test! If I have the stock rom what can I do to stop it from rebooting?

Best regards,
[Galaxy S II Q&A, Help & Troubleshooting] Buddy39914:
Had this problem. Reflash kernel or try another kernel
[Galaxy S II Q&A, Help & Troubleshooting] madroxx:
Since the phone is in warranty i suggest you to replace it.
[Galaxy S II Q&A, Help & Troubleshooting] mjeshurun:
Used to have reboots almost once a day. However, as of yet, since I upgraded to KF3 with Kies I haven't had a single reboot.
[Galaxy S II Q&A, Help & Troubleshooting] rizdroid:
After seeing these videos http://youtu.be/pESCzIrp8tk & http://youtu.be/fd2-fEJZX3k I realized all I needed was to clean the battery contacts. Random reboots are gone (so far)!
[Galaxy S II Q&A, Help & Troubleshooting] d3l1:
will try that but I can make my phone reboot by hitting the "back" button continously. Like going back back back back in an app, most of the times it reboots when doing that. Maybe it has something to do with the kernel, is didn't happen with the stock kernel. But they are not random, I had 3 random reboots without doing anything since I have my S2, all of the other reboots where produced due to excessivly hitting the "back" button :)
[Galaxy S II Q&A, Help & Troubleshooting] kanchiwij:
ANSWER!!?? looks like

my experience it was the battery..its a loose fit by design!

after suggested remedy > here had no restarts, except once when i dropped the bloody thing, oops.. its been 2 months since doing this, for me the prob is over..

giv it a go, since nothing else seem to work u guys..

:)
[Galaxy S II Q&A, Help & Troubleshooting] xZeDgEx:
So my random restarts only happen when listening to music. Installed winamp and have been using it for few days. No restarts so far.. Guess there's issues with the stock player?
[Galaxy S II Q&A, Help & Troubleshooting] Celio_Bianchi:
I'd been having this problem since having my Stock GS2. It'd randomly restart when on a call, texting or downloading. Anything really would cause a restart. To confirm it was a loose connection between the battery and device itself, I removed the cover and tried to 'jig' the battery a little, et voila! The device would switch off.

I've now put a piece of paper in between the battery and battery cover, so far so good. I'll still be taking it back to the shop and requesting a new one as to be fair, this is a design flaw. Samsung should be reimbursing us for the inconvenience..

Or maybe I'm being petty...
[Galaxy S II Q&A, Help & Troubleshooting] Ultimatefe:
I have had same problem after I installed 2.3.5

I has never restarted itself while doing something. Usually,when phone is on the staying mode, it resets itselft randomly. I think,it is not about the sd card. Is there anybody who solved this issue by doing something? I do not know what i am suppose to do..
[Galaxy S II Q&A, Help & Troubleshooting] sooby77:
My new SG2 is doing random reboots as well. What's worse is that it would randomly freeze when browsing or changing from one app to another. So frustrating and disappointing.
[Galaxy S II Q&A, Help & Troubleshooting] Dexonja:
Galaxy s2 restart...

My Galaxy s2 restart when i entering in some apps...about once a day :(
[Galaxy S II Q&A, Help & Troubleshooting] mightbme:
Have you & sooby tried moving all your apps OFF of your SD card? See page 1....
[Galaxy S II Q&A, Help & Troubleshooting] sooby77:
I don't know about samlives' problem, but mine was freezing and rebooting randomly WITHOUT any additional software installed. Besides, why would I have to move software to my microSD card? It should just work out of the box. Otherwise, it's a deeply flawed product to begin with. MicroSD card is OPTIONAL in these Android devices.
[Galaxy S II Q&A, Help & Troubleshooting] Dexonja:
Its not problem in sd card and battery...
[Galaxy S II Q&A, Help & Troubleshooting] asankaca:
My reboot issue solved!

I also had the issue of rebooting when using Android stock music player.

(Only when using stock music player...)

So i bought PowerAmp from market. Only issue with it was the audio loudness was too low for my taste.

About 4-5 weeks ago samsung released the 2.3.4 firmware update for device & now stock music player works perfect. (I waited this long so i can be sure...) I restarted the device only 2 times since & no rebooting for me anymore since update. :D:D

Looks like an Android issue for me.

Oh... by the way Galaxy S2 is the best phone i had so far, beats my previously owned iPhone 4 by every aspect; great work Samsung.
[Galaxy S II Q&A, Help & Troubleshooting] sooby77:
I returned the unit and got a different one. This new one is a French version, stuck at 2.3.3. But that's OK, since it's very stable and has only rebooted once in the last 4 days when I was playing with the Chartcross GPS app. The same cannot be said with the first unit, which was a UK unit. That unit, even after a 2.3.4 update, it was still rebooting randomly.
[Galaxy S II Q&A, Help & Troubleshooting] gooner4life:
so how do i diagnose the reboot problem guys? I'm so worried it might be hardware related, but my biggest suspect like most of you all is the class 4 SD card..Any idea why? Should i upgrade to a better SD card? or just the way the phone itself? Dam it's irritating when it reboots half way playing games

---------- Post added at 01:21 AM ---------- Previous post was at 12:37 AM ----------

Ok, after installing couple of games from glu my phone froze and entered reboot loop. So i suspected it could be because those games are in SD card, i took them up and it seem to be ok now. So what? SGS2 can't take SD card? This sucks! Considering it's one of the best phone out there!! GRR this is irritating!! IF this is the case, i'm selling my sgs2 and moving on the nexus

---------- Post added at 01:46 AM ---------- Previous post was at 01:21 AM ----------

It's DEFINITELY SD CARD that's causing the reboot problem!...just on hunch, i went to unmount and mount the sd card. As soon as i pressed mount the SD card the phone reboot! So is the problem problem lies with the sd card or the program installed? I'll try format see if it helps
[Galaxy S II Q&A, Help & Troubleshooting] remics:
I have also identified the culprit of random restarts to be the SD card. I don't actually blame the cards since I have tried 2 different ones, different manufacturers. One card is an A-Data 16gb, second is Nokia 8gb (or whatever brand Nokia used for the SD bundled with the 5800).

Both cards are completely empty, freshly formatted. If I pop them in the phone will reboot about once / twice per day. No card in the phone and it will run smoothly for weeks.
[Galaxy S II Q&A, Help & Troubleshooting] gooner4life:
YEP!...as soon as u put apps into sd card, you'll run into reboot issue. I just store my apps in phone memory, and only pics and video in sd card. Apps run faster and, i haven't seen one restart since i formatted my sd card 2 weeks ago. So there you go..problem identified and solved. Shame Samsung can't make simple like storage perfect ..