yashsingh1/xdaforums huggingface dataset:
[Galaxy S II Q&A, Help & Troubleshooting] Satya_love:
Hello Developers,

While updating the firmware, my Galaxy S2 is stuck in a bootloop.

Step-by-Step Analysis:

- Firstly I had SensatioN 3.0 and then I decided to try on Cyanogenmod 7.1 using the update guide mentioned.

- But after completing all the steps mentioned i got my phone in a boot-loop. Recovery mode couldn't be opened while Download mode still worked.

- Again I tried to flash codeworkx's Kernel with the ClockworkMod Recovery 4.0.1.4 as given in the guide for cyanogenmod. This helped me to restore the access to Recovery mode. But I coundn't do anything in CWM because it showed some messages like:

- To overcome this issue, i tried to install a stock firmware ICS XWLP8. But again after restart I found a bootloop.

- Tried flashing the Stock kernel for XWLP8 and again with CF Root Kernel XW_XSA_LP8 v5.4 but still the phone is stuck with boot-loop.

Current Situation:

In boot-loop. Can't enter recovery mode but Can enter Download mode.

Please help!
[Galaxy S II Q&A, Help & Troubleshooting] Phalanx1234:
ICS

I've been running ICS (resurrection) since it was first available, and it was working fine. When I tried to go from 1.3-1.5 it just gets stuck on the boot screen (no looping, just stuck on that screen) (with yellow triangle).

I've tried the steps listed on the first page (currently running Vanilla ROM), and it doesn't fix it.

I've downloaded the latest AUS firmware from Sammobile.com and tried to install that and it causes a boot loop.
[Galaxy S II Q&A, Help & Troubleshooting] pandalov3:
Go into Download mode and try to flash a custom rom via Odin.
[Galaxy S II Q&A, Help & Troubleshooting] howardthewebb:
Cannot access recovery mode

I used Odin to flash with 4.0.3 XXLPQ, which I understand is a stock Samsung ROM. According to Odin everything went great, but now my phone is stuck in a boot loop - The initial screen comes on for a few seconds, then the phone restarts. The power button doesn't work to turn the phone off, and recovery mode (volume up, home + power key) doesn't work. Download mode (volume down, home + power key) does still work, but the phone is no longer recognized on PC so can't download again. Is there any alternative way to enter recovery mode..?
[Galaxy S II Q&A, Help & Troubleshooting] max.android:
your last option would be to use a usb jig..its easily available from ebay.
[Galaxy S II Q&A, Help & Troubleshooting] T__:
If you can get in to recovery, wipe data/cache/dalvik - then reboot.

If can't get in to recovery, but can get in to download, get the official version of ICS for your region (presuming you where running a ICS based rom), there is a list in "General" under our phone; load up Odin, connect the phone, put the files in; if one file, put in PDA; if multiple, put in corresponding field and click start.
[Galaxy S II Q&A, Help & Troubleshooting] joukevrossum:
Nice

This is a good thread! :-)
[Galaxy S II Q&A, Help & Troubleshooting] Charlie Wax:
From ICS 4.0.3 to GB 2.3.4

Hi all.

I want to go back to stock GB from ICS 4.0.3 to update my phone over OTA.

What i've done was:

1. flashed via Odin 3 file GB 2.3.5 - phone booted normally

2. then flashed via Odin 1 file GB 2.3.4 - got a damn bootloop and lot of red letters can't mount this, can't mount that blah blah blah...

what am i doing wrong?

tnx in advance
[Galaxy S II Q&A, Help & Troubleshooting] kebintiyan:
thanks for the info :D
[Galaxy S II Q&A, Help & Troubleshooting] fofo13:
Help Please

Hi people, I got a S2, stock ROM 2.3.4 with root via odin. I use my phone for 6 months with restarts and shut downs. One day I just turn it off and it stuck on samsung model screen (before S animation). My phone stays in that screen or restart, I took batery off, root odin again, but nothing... I can get into recovery and download mode, I made step by step all the instructions on this forum, all went succed, nothing fail. But I can't get the phone to work, I'm still stuck on samsung model screen.

What else can I do? :confused:
[Galaxy S II Q&A, Help & Troubleshooting] T__:
Go in to recovery, wipe cache and data and try turn on.
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
I just wish I saw this in my blind panic last night! lol Great thread!
[Galaxy S II Q&A, Help & Troubleshooting] edbertin:
This post saves me lol.... My father always says dont´change something that you don´t know...i didnt follow his advice, and screw up my device lol

But now my phone is back and alive...

Thank a million.
[Galaxy S II Q&A, Help & Troubleshooting] cameron222:
I just got my US Cellular GS2 a few days ago and thought rooting would help connect to Kies, (says it's unsupported). The root worked but whenever the phone locks itself, it reboots. I am still not sure what I'm doing and I really need this new phone to work again with or without a root. Any instructions please?

It is model: sch-r760

Android Version: 2.3.6

I don't know where to find the original files at least for the USC version or how to flash them really. Tell me what else you need to know and any help will be extremely appreciated.
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
intratechs rom thread should be first place to go, I found at least there I could see which version I needed. The DL link was down for the rom I needed which when my phone want wrong was the last thing I needed lol.

I will look for the thread for you and link it here, give me 5 minutes. ** http://xdaforums.com/showthread.php?t=1075278 **

Once you have the firmware download odin and follow the guides here very carefully....again I will link instructions here.

http://xdaforums.com/showthread.php?t=1457458

It was very straight forward and even I couldnt believe how quickly I had done it.

Best

JR
[Galaxy S II Q&A, Help & Troubleshooting] scanz:
Hi all,

I cannot boot into recovery mode and my phone won't get past the Samsung boot image. I can boot it into download mode though.

I had been using Resurrection Remix ics v1.7 and went to upgrade to 2.1 today. It went fine and booted up, but then after a reboot it's just stuck at the Samsung boot image at the start and I can't even boot it into recovery mode.

Really need some help on this one...
[Galaxy S II Q&A, Help & Troubleshooting] CamoGeko:
Couple of things you can do... you can either flash an ICS kernel in ODIN while your phone is in download mode. Or you can flash a full stock ROM in ODIN first and then flash CF-Root kernel.

Both methods have equal chances of working for you.
[Galaxy S II Q&A, Help & Troubleshooting] scanz:
Thanks, would you be able to provide a link to either of which you recommend please?
[Galaxy S II Q&A, Help & Troubleshooting] CamoGeko:
Link to siyah is here:

http://gokhanmoral.com

For stock ROMS, search XDA... "Intratech's S2 stock ROM thread".
[Galaxy S II Q&A, Help & Troubleshooting] scanz:
Thanks, I flashed the Siyah KERNEL via Odin and now able to boot the phone. It's kept Resurrection Remix ics v2.1, should it be fine now or is there anything else you recommend doing? Luckily I had eveything backed up just before going from v1.7 to v2.1.

---------- Post added at 09:20 PM ---------- Previous post was at 08:35 PM ----------

Ah man it's done it again after rebooting and now even when I install the Siyah kernel via Odin it doesn't boot. Guess I should install a stock ROM via Odin... :(
[Galaxy S II Q&A, Help & Troubleshooting] CamoGeko:
Did you not boot into recovery and do a cache and dalvik cache wipe before booting into the ROM?

If that doesn't work, you will need to do a full factory reset/data wipe.
[Galaxy S II Q&A, Help & Troubleshooting] scanz:
Yes I done that and I've tried full factory reset/data wipe and it still won't boot. It booted after flashing Siyah via Odin, I restored apps and etc. then had to reboot for some changes to take effect and it's doing it again now - won't boot.

---------- Post added at 09:38 PM ---------- Previous post was at 09:32 PM ----------

It's somehow now booted up - genuinely no idea how - and I'm scared of turning it off/rebooting it again. Doesn't even let me into recovery mode, so I think my best bet is flashing a different ROM via Odin. Would you agree?
[Galaxy S II Q&A, Help & Troubleshooting] xxxgladi8orxxx:
Get the stock ICS ROM (the .tar file) and using odin, flash your phone - after putting it into download mode obviously. Then you can put a custom ROM again.
[Galaxy S II Q&A, Help & Troubleshooting] scanz:
Thanks, I have managed to flash I9100XXLPH via Odin and at least the phone is now on...

Still worried to turn it off/reboot.
[Galaxy S II Q&A, Help & Troubleshooting] xxxgladi8orxxx:
Don't worry dude, you'll be fine :D

This thing only happens like once in a lifetime, its really rare if you flashed your phone correctly. Still, happy to hear you got your phone back working!

Cheers! Keep trying new ROMs and let the XDA community develop :cool:
[Galaxy S II Q&A, Help & Troubleshooting] KNTXTremE:
Thank you very much!
[Galaxy S II Q&A, Help & Troubleshooting] trooperjohn:
stuck

For warranty purposes i wanted to flash stock rom and create a backup, however i have followed your method perfectly and still stuck in boot loop, i can however flash a custom rom and that works like a dream, so i am slightly confused. i am using cm9 and will be staying with it, i have also flashed many roms before, and know what i am doing but for whatever reason i cannot seem to revert to stock :S
[Galaxy S II Q&A, Help & Troubleshooting] joesatri:
Going nuts!

Right...

I was gonna prepare my phone to give it to my wife.. (factory reset), but it was very low on battery, and after i did a factory reset (from menu), it got stuck at Samsung Galaxy SII logo.

I can go into download mode and stock recovery, but my usb port is busted, cannot flash via odin.

I tried flashing via recovery (from external SD card), but i get:

e:signature verification failed

installation aborted

Any help is highly appreciated..

Thanks
[Galaxy S II Q&A, Help & Troubleshooting] artesea:
Same here, tried to wipe the GS2 using the option from the settings menu. 30 mins later still on boot logo. Can get recovery and download mode to work, but ODIN can't see the phone (found the GS3 fine)
[Galaxy S II Q&A, Help & Troubleshooting] artesea:
Managed to fix mine, by using an old WinXP laptop which had ODIN already installed.
[Galaxy S II Q&A, Help & Troubleshooting] bachot:
Im stuck on the loading... screen of ICS Resurrection v1.1

I tried to do a factory reset cause i have a message constantly saying my space was low. so when i did it got stuck on loading...

please help me.

i have a belgian phone (no brand)

im so clueless now.
[Galaxy S II Q&A, Help & Troubleshooting] neerajganga:
go to recovery mode and do a factory reset and wipe cache

then reboot

ur phone shud b up and running after that
[Galaxy S II Q&A, Help & Troubleshooting] bibymon:
You can turn off the signature verification in the recovery
[Galaxy S II Q&A, Help & Troubleshooting] kinglee:
I have the same situation here too. Can't flash anything that fails signature verification.
[Galaxy S II Q&A, Help & Troubleshooting] bibymon:
Turn off the the signature verification.. Cwm --> install zip from sd card --> toggle signature verification
[Galaxy S II Q&A, Help & Troubleshooting] bluepratham:
i hav differsnt kind of problem..i also get the same kind of bootloop

but earlier i used to get CWM recovery mode...but now i get ANDROID recovery mode...also no ADVANCED option is available there in which i can go to WIPE DALVIK CACHE...please help...i9100 ics4.0.3 XWLP7
[Galaxy S II Q&A, Help & Troubleshooting] CamoGeko:
Tried flashing CF-Root via ODIN while your phone is in download mode?
[Galaxy S II Q&A, Help & Troubleshooting] bluepratham:
yes..i hav tried that...helpless

i can enter into download and recovery mode

but it is stuck during boot at MODEL NO.

help me..asap
[Galaxy S II Q&A, Help & Troubleshooting] bluepratham:
yes i have tried that..but it sticks on boot logo

trecovery and download mode are working

when i tried to make backup usin recovery it said NO SD-EXT

what does this mean???plz help
[Galaxy S II Q&A, Help & Troubleshooting] crazy_android:
the only possible way is come back again to stock version.this can be done by download mode via odin. flash stock version according to your region with suitable modem,after that u can agin root ur gs2 via CF- root kernel.:)
[Galaxy S II Q&A, Help & Troubleshooting] CamoGeko:
Well, it its should work. You need to do a factory reset afterwards in recovery, make sure you format /system. Then flash a rom of your choice.

Don't worry about sd ext.

... typed by a proud owner of HTC One X 32GB, the best HTC Android device so far!!
[Galaxy S II Q&A, Help & Troubleshooting] inu629:
Anyone got same problem as me?????

- RR 2.5.2 -> Bootloop

- CM9 nighty latest -> Bootloop

(try many solutions but can't help)

- RR 2.5.1 works fine.

- CM9 earlier version works fine.

Anyone knows pls share

Thanks
[Galaxy S II Q&A, Help & Troubleshooting] emma129:
i have followed these instructions very carefully and my phone is still stuck on boot up, i tried to flash the speedmod-kernel-s2-k2-21-Odin.tar, is this the correct thing to flash? this is the only part i am confused about, thanks
[Galaxy S II Q&A, Help & Troubleshooting] new2androids:
If I flash a new firmware and skip the wipe data steps, will the boot loop problem be solved? I'm trying to avoid wiping data as I have not backed up all my stuff. I know, I know...

My SGS2 is the Korean version (M250K) flashed with a European firmware (I can't remember which one exactly, maybe UK or German; it's multi-CSC: DBT as shown in recovery mode). I am afraid to alter anything because I don't have the original stock firmware. It maybe running on a custom ROM as it has Chinese applications that cannot be uninstalled (I bought the phone in Shanghai from a black market).

Today, after recharging my phone and trying to turn it on, it wouldn't completely start. It goes into a boot loop (only turns on and shows the GT-I9100 logo, then a second or two of the Samsung boot logo).

I'm trying to avoid having to wipe my data - that should be the last resort. Is there any other way to fix my boot loop problem?

BTW, my phone is on OS 2.3.4, and I'm planning to flash ICS. I don't have root privileges either.

Edit: I just found this info about my phone from another post I wrote a long time ago.

Details of my SGS2:

PDA: I9100XWKDF

Phone: I9100XXKDJ

CSC: I9100OXXKDD

Build info: Fri Apr 29 08:31:21 KST 2011

Build number: QUENS.CHS.GINGERBRED.XWKDF

Kernel version: 2.6.35.7-I9100XWKDD-CL161513root@Dell103 #2

In addition, I don't know what caused my phone to go into this boot cycle (it won't even complete the Samsung boot up animation). I did not flash/install any ROM, kernel, or firmware before this happened. I've never actually done anything like those. I tried a power cycle with battery removed to no avail.

Please help me get the best solution. TIA!
[Galaxy S II Q&A, Help & Troubleshooting] atamaOne:
SG2 Can´t get into recovery mode

Hi there,

i have a SG2 Model: GT-i9100G with Gingerbread OS.

i tried to reach root rights by flashing it with odin i the download mode with CF-Root-kernel.

Something wrong has happend while this process.

how ever while the boot process the phone is caught in a boot loop.

unfortunately i don´t now my exact os build nr, i have forgotten to make a system notice

Ok, i thaught give google a try and find out how resolve this issue.

And these these steps are described at the begin off the boot loop thread:

1) Turn off your phone. Unplug it from your computer etc

2) Hold down home, power, and volume UP. This will enter recovery mode. If you are using CF-Root, you'll get CWM recovery. If not, you get stock recovery. It doesn't matter which appears.

3) Choose to wipe user data from the menu.

4) Turn off the phone by long-pressing the power button.

5) Prepare ODIN on your PC by using task manager to kill any KIES processes, then open ODIN.

6) Put your phone into download mode (home + power + volume down)

7) Plug your phone into the computer using the factory USB cable. The leftmost box should go yellow and an ID number will appear.

8) Flash a stock ROM from those available in ODIN format, and the phone will boot correctly.

But at step 2 is my personal problem, i can´t get into the recovery mode for a factory reset.

It´s only possible to get into the download mode for me.

so how should i process a factory reset now?

---------- Post added at 04:06 PM ---------- Previous post was at 03:52 PM ----------

Hi there,

i´m in a boot loop after tried to reach root rights with the CF-Root flash.

now i´m caught in a boot loop and can´t get into recovery mode.

is my understanding right that the only possible way to get a working os again is to flash via download mode a stock version according to my region. But i don´t know exactly which build version of gingerbread i have. Which stock version should i use and where can i get it.

i have the a Galaxy S2 Model: GT-I9100G and a Gingerbread 2.x in for german regiion.

Could you please give me an advice ?
[Galaxy S II Q&A, Help & Troubleshooting] ctomgee:
Why isn't this a sticky anymore?
[Galaxy S II Q&A, Help & Troubleshooting] hem0101:
Thanks :) Had created 2 partitions and after deleted 2nd rom... phone stuck to logo...

Problem solved by instructions
[Galaxy S II Q&A, Help & Troubleshooting] jacyy69:
Hi I'm a french noob, so excuse me if my explanation of my problem isn't very clear,

I have a bootloop problem, but my home button isn't working so I can't go to the recovery mode,

I can go to the dowload mode using the jig I bought, and from there I already flashed a stock

ROM but the bootloop is still there, any Idea ?
[Galaxy S II Q&A, Help & Troubleshooting] HANDSY:
When you flashed a stock ROM did you just use the PDA section in odin. Also well done on posting in correct thread.

Edit : in this Q. A. thread this is a guide on recovering a boot looped phone by Phistachio. I've used it once and it does work. However it uses the CSC section in odin so it will wipe your phone. All the best.
[Galaxy S II Q&A, Help & Troubleshooting] jacyy69:
Thanks first for your fast reply! So yes I only used the PDA section of Odin, I have no doubt about this guide working, but as I told you I can't go to the recovery mode and I think I can't flash VillainRom v1.1 because it's too old. I can wipe my phone by using the CSC section in Odin ?
[Galaxy S II Q&A, Help & Troubleshooting] HANDSY:
The recovery package used in the guide is flashed in odin so it only needs download mode. Just follow the guide, read carefully as it covers several sgs2 models and you need to download the correct package.

http://xdaforums.com/showthread.php?t=1457458
[Galaxy S II Q&A, Help & Troubleshooting] jacyy69:
Thank you very much for the thread link I think that this will fix my problem! But I still have a question,

I was on a custom jelly bean Rom and I didn't have any bootloop problem, then I flashed the ICS stock

Rom and the bootloop problem appeared. The flash worked and I'm currently on the stock ICS Rom

because the triangle went away. In the thread you showed me, they are saying that I have to come from

an ICS Rom, do you think everything will work out ?
[Galaxy S II Q&A, Help & Troubleshooting] HANDSY:
As I don't know exactly how the bootloop occurred i can't comment

or guarantee it will work. All I can say is that it worked for me and it will wipe your phone of any personal data photos, music etc. I'm not qualified to advise further perhaps ask these questions in that thread. All the best hope all goes well.
[Galaxy S II Q&A, Help & Troubleshooting] jacyy69:
Thanks for everything!
[Galaxy S II Q&A, Help & Troubleshooting] Kasvinda:
Help me please

I flashed cm10 and then flashed gapps-jb-20120724-signed and then wiped out data/factory reset also wiped cache.

But bootloop at "samsung galaxy sii" screen

I tried several times. Phone work properly when gapps isnt there.

What should i do?
[Galaxy S II Q&A, Help & Troubleshooting] ImWarped:
Bootable Brick?!

Alright... I've got a good-er...

I attempted to flash a new ROM tonight. Everything "was" going alright, I rebooted. and the phone hangs. I boot back into recovery, reflash, reboot, it hangs.

Attempt to restore backup... Not found.

Fire up Odin... Flash stock... reboot... hangs at stock recovery (first boot install of CSC garbage)

Reflash via Odin for giggles...

Hangs at recovery, and just prior to rebooting on its own "ERROR: Cant Mount \Data flashes on the screen.

Now, I've flashed hundreds of ROMS on this thing... I've never seen anything remotely like this in the forums. Spent a little time on Google... is it possible my partitions are dead? if so, how can I fix it? Everyone says I'll brick it further if I use the PIT and repartition... But as far as I can see... I don't have a data partition to boot!!!

Any help would be greatly appreciated...

Thanks.
[Galaxy S II Q&A, Help & Troubleshooting] The-Droidster:
Duh! In short....

Got Bootloop?:(....Flash a Stock ROM via ODIN....Hurrah?!!:p

This probably saved a lot of lives:D:p:good:
[Galaxy S II Q&A, Help & Troubleshooting] ImWarped:
Well, no one attempted to answer anyhow... but as an update, my phone won't even power up anymore... so I'll be buying my S3 next month a little ahead of schedule
[Galaxy S II Q&A, Help & Troubleshooting] kabelux:
BootLoop on SGS2 - F1 GalaxyNexus Build 5 (05-06-12)

Hi, people

my phone was doing fine, working well. But today suddenly it turned off and when i turn on entered on a BootLoop.

I tried to format data and cache, but phone hangs for some minutes and resets.

It hangs on Formating /Data... for something like 5 minutes and resets. :( :crying:

Anyone can help? Thanks
[Galaxy S II Q&A, Help & Troubleshooting] load"":
hello

I've just upgraded my SGS2 from stable cm9 to nightly cm10 and now I having bootloop with sd-card in. With no sd-card system boots normaly

I tryed format sd-card into ntfs,fat; tryed experimental and nightly roms, but still gave bootloop

solved: sd-cadr was formated as logical disc. formatting as promary solved the problem
[Galaxy S II Q&A, Help & Troubleshooting] Valii:
help

I tried to install joyOS and now it keeps restarting at the image with "galaxy s2 gt-i9100" and the yellow triangle. Anything I can do to fix this without flashing another ROM?
[Galaxy S II Q&A, Help & Troubleshooting] khalakov:
flashed JB 4.1.2 of S2 I9100G into S2 I9100

I have (well had cause probably bricked it) Samsung Galaxy S2 flashed few times with Jelly Bean ROMS no problems. However this time I downloaded the wrong JB (S2 9100G) by accident and flashed it. Now I can't get the phone to neither boot nor in recovery mode. I can only get it in Download mode. Is there any way I can get it to boot in Recovery mode or is it dead I should look to buy another phone?

Please help.:crying:
[Galaxy S II Q&A, Help & Troubleshooting] mr_tris:
If you still boot into download mode then use Odin to flash the correct pit file with re-partition checked then flash a stock ROM.
[Galaxy S II Q&A, Help & Troubleshooting] vasmox:
i installedalliance rom v4.1 in galaxy s2...i tried to update visual mod in ota...stuck in boot...system memory more than 700mb...any solution?

also is there sense style task manager for galaxy s2:rolleyes: