stock phone stuck in a bootloop out of nowhere - Galaxy S6 Edge Q&A, Help & Troubleshooting

hello everyone, my stock s6 edge on rogers is stuck in a boot loop all of a sudden, fully stock and unmodded, running 5.0.2. i was just walking and listening to music through bluetooth headphones and all of a sudden it stopped, and i looked at my phone and it was rebooting. so i just waited and its still stuck in a boot loop after an hour. it gets to the lock screen sometimes, and then after like a second or 2 just reboots again. i have not tinkered or have done anything to my phone either, and had no issues with random reboots ever, so i have no idea what could have happened
some extra info, when it reboots it doesnt always go to the galaxy s6 edge screen, it sometimes just shows the samsung logo with the animation. i have also tried to wipe cache and that didnt work either. after a few reboots however the stock theme was applied at some point. also i tried booting into safe mode and that also didnt work.
i really dont want to wipe my phone, but i will if it is absolutely necessary. so if anyone has any other suggestions that i can try out it will be very much appreciated!
thanks!

NuckFuggets said:
hello everyone, my stock s6 edge on rogers is stuck in a boot loop all of a sudden, fully stock and unmodded, running 5.0.2. i was just walking and listening to music through bluetooth headphones and all of a sudden it stopped, and i looked at my phone and it was rebooting. so i just waited and its still stuck in a boot loop after an hour. it gets to the lock screen sometimes, and then after like a second or 2 just reboots again. i have not tinkered or have done anything to my phone either, and had no issues with random reboots ever, so i have no idea what could have happened
some extra info, when it reboots it doesnt always go to the galaxy s6 edge screen, it sometimes just shows the samsung logo with the animation. i have also tried to wipe cache and that didnt work either. after a few reboots however the stock theme was applied at some point. also i tried booting into safe mode and that also didnt work.
i really dont want to wipe my phone, but i will if it is absolutely necessary. so if anyone has any other suggestions that i can try out it will be very much appreciated!
thanks!
Click to expand...
Click to collapse
I have had said problem before under the same circumstances (although it was with a different phone)
Try using Odin to install the stock Firmware.
A thread explaining how is right here.
http://forum.xda-developers.com/galaxy-s6-edge/general/sm-g925f-s6-firmware-thread-t3078841
If you don't want the firmware listed in that thread, download from Sammobile.
While some users say it does not wipe the phone, it wipes every time I use it
If this does not work, you should get a warranty replacement.

Snowby123 said:
I have had said problem before under the same circumstances (although it was with a different phone)
Try using Odin to install the stock Firmware.
A thread explaining how is right here.
http://forum.xda-developers.com/galaxy-s6-edge/general/sm-g925f-s6-firmware-thread-t3078841
If you don't want the firmware listed in that thread, download from Sammobile.
While some users say it does not wipe the phone, it wipes every time I use it
If this does not work, you should get a warranty replacement.
Click to expand...
Click to collapse
Thank you for the reply!
weird thing is it fixed itself .. few hours after it started it just booted back up and didnt reboot again, and has been running fine for the past couple hours. but if this happens again i will know what to try next time

Related

[Q] Galaxy S2 Stuck on Boot-Up Screen

I have an international version of the Samsung GS2 that i am using on At&t. A few weeks ago i noticed that my phone would suddenly turn off while in my pocket or just left alone. Then, one time i tried turning on the phone and saw that the phone got stuck on the boot animation screen with blue markings all around it. I took out the battery and put it back in a few times and was finally able to get the phone to work.
Today, the same thing happened. The phone turned off i tried to restart it and it got stuck on the boot animation screen (Galaxy S logo). It has these blue markings around it and it can't get past it. The phone isn't rooted and i have not tampered with the system files. I've only updated it once, from 2.3.3 to 2.3.4. I tried factory resetting it but nothing changed and its still has the same problem.
I have a suspicion that it might be caused by the fact that i've dropped the phone a few times. What do you guys think could be the problem and what are my choices in getting it fixed? Would flashing a stock rom help fix the problem?
I would suggest flashing the Stock Rom Through Odin as i once has an issue with massive yellow streaks kind of like what you are getting after a flash before.
I went ahead and flashed a few roms from http://forum.xda-developers.com/showthread.php?t=1075278. The flashing worked fine but it still can't get past the bootup screen and the blue marks are still there.
Would calling Samsung and asking for support get me anywhere?
How long did you wait after flashing the rom? The worst way you could have messed up is by choosing the wrong files in Odin. Did u check that again?
Sent from my GT-I9100 using xda premium
I flashed the rom and rebooted and saw that it was still the same. Does it matter which rom i chose? I tried two or three different roms from the thread. I though they were all stock roms...

Phone keeps shutting down seconds after the system starts

Hi all.
I have installed the Cyanogenmod 12.1 UNOFFICIAL on my Galaxy S II for several months, but yesterday, suddenly, the phone shutted down and kept doing this everytime I tried to turn it on, until I couldn't even go further than the "Samsung Galaxy S II" sign.
At first I could boot in recovery mode, so I tried to do a full wipe and then re-install the Cyanogenmod, but something went wrong during the installation and a dead android with a red triangle appeared in the background. I rebooted the phone, and from that moment on I couldn't even boot in recovery mode anymore.
So I followed this guide found in the forum to fix the issue (http://forum.xda-developers.com/galaxy-s2/general/guide-fix-unflashable-soft-bricked-gsii-t1449771) and it worked well, because the phone installed everything successfully.
Now, the bad news is that the phone keeps shutting down soon after the operative system starts (I can't even finish the initial configuration). The good news is that at least I can boot in recovery mode (in this way the phone is turned on as long as there is enough battery energy, so it is not an hardware problem, I guess).
I really don't know what else could I do.
Can you help me in any way please? Is it a known issue? How can I fix this?
If you need further informations I'll be happy to let you know them.
Very thanks in advance.
You are using an unofficial build of CM, install an official build of CM12
Fhronk said:
Hi all.
I have installed the Cyanogenmod 12.1 UNOFFICIAL on my Galaxy S II for several months, but yesterday, suddenly, the phone shutted down and kept doing this everytime I tried to turn it on, until I couldn't even go further than the "Samsung Galaxy S II" sign.
At first I could boot in recovery mode, so I tried to do a full wipe and then re-install the Cyanogenmod, but something went wrong during the installation and a dead android with a red triangle appeared in the background. I rebooted the phone, and from that moment on I couldn't even boot in recovery mode anymore.
So I followed this guide found in the forum to fix the issue (http://forum.xda-developers.com/galaxy-s2/general/guide-fix-unflashable-soft-bricked-gsii-t1449771) and it worked well, because the phone installed everything successfully.
Now, the bad news is that the phone keeps shutting down soon after the operative system starts (I can't even finish the initial configuration). The good news is that at least I can boot in recovery mode (in this way the phone is turned on as long as there is enough battery energy, so it is not an hardware problem, I guess).
I really don't know what else could I do.
Can you help me in any way please? Is it a known issue? How can I fix this?
If you need further informations I'll be happy to let you know them.
Very thanks in advance.
Click to expand...
Click to collapse
Is your device boots and works well on stock?
nhmanas said:
Is your device boots and works well on stock?
Click to expand...
Click to collapse
My device couldn't even boot in the end. However I solved the problem by changing battery, so it wasn't a software problem. Thank you anyway!

[Help] Weird freezes and shutdowns (flashed Stock)

So i have a galaxy s5, was running Cyanogenmod 12
my phone was freezing and rebooting then eventually it was stuck and would only boot into download mode
so i cut my losses and flashed stock 4.2 and 5.1.1 (files from samMobile matched model number) and the problems persist
cleared cache and factory reset multiple times and booting in safe mode doesn't fix anything
the phone freezes on samsung splash screen usually mid animation, sometimes i get to tmobile screen when it freezes.
sometimes it will boot without any problems and work normally for a few seconds then freeze and shut off into the same loop
i have searched and can't find any advice past (flash stock and your good )
oh and knox counter 0X1 (2) so no warranty for this guy.
What a helpful forums
I would recommend taking out your sim card and memory card before doing a factory reset. Once done let it boot and see what happens. If it works ok aka boots fine let it sit for 10 min. Now power it down and put your sim card in only and boot up again. Wait the 10 mins again to see if anything happens. If all good power off and put the memory card back in and repeat. Also do not sign into your google account while doing this. Do not sync anything. Just do it bare bones. If everything seems to go well, then you can slowly start putting stuff on and syncing things. when you notice it starting to happen undo the last thing you change/added. Hope that helps. And remember to be nice. Sometimes it takes a while to get help. Being rude isnt the answer pal. Good luck and hope you had a good holiday.
Mudderz said:
So i have a galaxy s5, was running Cyanogenmod 12
my phone was freezing and rebooting then eventually it was stuck and would only boot into download mode
so i cut my losses and flashed stock 4.2 and 5.1.1 (files from samMobile matched model number) and the problems persist
cleared cache and factory reset multiple times and booting in safe mode doesn't fix anything
the phone freezes on samsung splash screen usually mid animation, sometimes i get to tmobile screen when it freezes.
sometimes it will boot without any problems and work normally for a few seconds then freeze and shut off into the same loop
i have searched and can't find any advice past (flash stock and your good )
oh and knox counter 0X1 (2) so no warranty for this guy.
Click to expand...
Click to collapse
after all that, doesnt it sound like a problem with hardware? sure is a lot like when a pc is malfunctioning (due to overclock or damage, etc)
my only ideas are try turning it on in cold weather, plugged into wall power, & an extreme case... maybe modifying a kernel to give a little more voltage to the cpu & gpu... the idea is a bit out there, but again with the pc example, there's a chance for it to do the trick, but also chance to accelerate damage IF it's entirely based on usage (but if it's dying already, there's no going back)
my pc gpu failed in an interesting way a few years ago, i was playing limbo of all things, not a demanding game, capped at 60fps, then the whole system froze randomly, so i restart, start game again, froze again, think i had one more go until artifacts appeared on screen & it froze/bsod'd as soon as the driver loaded, a clear hardware death
Same Problem
Mudderz said:
So i have a galaxy s5, was running Cyanogenmod 12
my phone was freezing and rebooting then eventually it was stuck and would only boot into download mode
so i cut my losses and flashed stock 4.2 and 5.1.1 (files from samMobile matched model number) and the problems persist
cleared cache and factory reset multiple times and booting in safe mode doesn't fix anything
the phone freezes on samsung splash screen usually mid animation, sometimes i get to tmobile screen when it freezes.
sometimes it will boot without any problems and work normally for a few seconds then freeze and shut off into the same loop
i have searched and can't find any advice past (flash stock and your good )
oh and knox counter 0X1 (2) so no warranty for this guy.
Click to expand...
Click to collapse
I am having the same problem. Any other advice. I have flashed with odin F0G6 stock firmware.

Bootloop remains even after Stock flash in ODIN

Hello guys, I have a serious predicament that needs to be solved.
I haven't did anything major to my phone in years so the past couple days have been a nightmare. Ever since I did a wipe of cache partition after trying to get rid of this "unfortunately, contacts stopped working." message, it's sent my phone into a spiraling disaster. (I have been using stock 5.0 rooted rom for at least a year so idk why the sudden issues)
I've literally tried every method imaginable. I even tried flashing with different versions of Odin and still the exact same problems.
I can get my phone into DL mode easily but Recovery mode only works if I have the phone plugged in at this point (Actually, it seems like the only time when my phone wants to work)
Every time I'm done flashing, it'll load all the way up to the T-Mobile screen then restart the loop all over again :/
Really need help seeing as I need to get this situation handled before work today, thanks!
Nevermind, after more research, I decided to order a new battery and the problem is solved.
Bootloop solved with replacement battery
gkenga said:
Nevermind, after more research, I decided to order a new battery and the problem is solved.
Click to expand...
Click to collapse
A replacement battery also solved my boot loop issue. Prior to replacement, it would boot to Galaxy S5 screen, and then reboot. Replaced battery and boots. Put the old battery back in, and it boot looped.

Note 8 crashing after flash

So I've reached out to this forum as I've tried a million and one things but can't seem to get my phone to boot.
Here's the situation:
I fell asleep watching a video on my phone and my phone died. I plugged it into the charger and it wouldn't boot, would just endlessly be stuck in a boot loop. Looked it up and saw this is a common issue. Went through the standard fixes:
Wiped the cache
Factory reset the phone.
Attempted to boot in safe mode. (Wouldn't work, still boot looped)
After all this failed I thought I would just flash it using Odin v3.14. T-Mobile is my carrier and I'm based in the US so I used this firmware: SM-N950U TMB, LINK(https://updato.com/download-samsung...sa/sm-n950u/B094B9DAF04A11EAB4A2FA163EE8F90B/)
It still didn't work after this. It booted up and the startup process began asking me to agree to the terms and conditions. Before even getting to agree, the phone crashed. I tried this again and it just kept failing and crashing. I did this all while plugged into a charger. What I did begin to notice is that the phone would get hot on the left side, where the battery sits. I'm not sure if this is related to the crash or just the fact that its been discharging and charging a lot while I troubleshoot it. I have tried different firmware as well just in case I had the wrong one, but nothing has been working. When I update the firmware I used the CSC file and not the HOME_CSC and I also use the USERDATA file since at this point I kind of accepted I'm not getting my pictures and files back and I'm just trying to get the phone to work once again, thus just trying to factory restore it. Also, when the phone does start booting it says optimizing apps on the bottom each time I boot it I feel this number is changing. I'm not sure what else to do or if anyone has any suggestions? Thank you in advance

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