Random bootloops and weird issues - Samsung Galaxy S7 Questions and Answers

Hi all!
My S7 is unrooted, completely stock, running latest 6.0.1 official update
Few days back I updated some apps from the play store and after that, my phone suddenly restarted on its own
This sudden restarting kept on increasing and currently the device boots up for a few seconds, and then freezes and restarts again
I know there's some faulty app that's causing the restarts, because once i managed to turn the UPSM on before the device restarted and it worked fine, with all the apps disabled
I have tried to get a logcat to look for the issue but I can't do that properly as I haven't taken any logcats before and i'm not familiar with the process
I have already tried to flash the stock firmware but that didn't help either
Is there any way or solution to get this fixed? Or can anyone here help me on how to get a logcat so that I can look for the error causing app?
There's a lot of stuff on my phone and I can't risk losing it by factory resetting it

I would boot into safe mode, backup my data first. Then start uninstalling apps I do not need and see removing which one fixes the issue.

munchy_cool said:
I would boot into safe mode, backup my data first. Then start uninstalling apps I do not need and see removing which one fixes the issue.
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Click to collapse
I've booted into safe mode as well, but that isn't helping either
The same keeps happening in same mode as well. The device boots up, and after some 30 seconds it freezes and restarts and gets stuck in a loop

Related

SM-G920I Keeps shutting down and recovery is not seandroid enforcing

Hello everyone,
My Galaxy S6 G920I has started shutting down repetitively. I was on stock and not rooted. After it happened a few times I decided to hard reset it and delete cache but it would get stuck on starting apps screen etc. After many attempts the phone finally started the user's guide for logging in etc. I was getting crash errors for settings and other things. It finally went in only to start shutting down again. Seeing how the apps were crashing I thought that there might be an issue with the stock ROM so I decided to flash a new one. I was having trouble finding my specific so I went for another one found here. I couldn't flash it with ODIN because it was on a zip format so I flashed TWRP on the phone.
The error recovery is not seandroid enforcing is now showing on different versions of twrp (2.8, 3.0).
I can't flash any ROM now and the one found in the device keeps shutting it down.
I don't believe it is a hardware issue as the phone stays on without issues on download mode. Any help on what steps to follow next would be highly appreciated.
apostol96t said:
Hello everyone,
My Galaxy S6 G920I has started shutting down repetitively. I was on stock and not rooted. After it happened a few times I decided to hard reset it and delete cache but it would get stuck on starting apps screen etc. After many attempts the phone finally started the user's guide for logging in etc. I was getting crash errors for settings and other things. It finally went in only to start shutting down again. Seeing how the apps were crashing I thought that there might be an issue with the stock ROM so I decided to flash a new one. I was having trouble finding my specific so I went for another one found here. I couldn't flash it with ODIN because it was on a zip format so I flashed TWRP on the phone.
The error recovery is not seandroid enforcing is now showing on different versions of twrp (2.8, 3.0).
I can't flash any ROM now and the one found in the device keeps shutting it down.
I don't believe it is a hardware issue as the phone stays on without issues on download mode. Any help on what steps to follow next would be highly appreciated.
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Click to collapse
Update it via smart switch it will turn on after that for sure. Or download the latest firmware via samfirm and flash it with Odin.
Thanks!
ammarwajihi said:
Update it via smart switch it will turn on after that for sure. Or download the latest firmware via samfirm and flash it with Odin.
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Click to collapse
I tried flashing the stock rom with ODIN and the phone successfully boots now. So a big thanks for that as it is progress. BUT the issue I was orginally having persists: The device keeps turning off 10-20 seconds after booting. Do you have any idea why that might be?
Sometimes it will freeze first and then turn off but never stay on for longer.
I have tried Safe Mode and turning all connectivity related modules off.
apostol96t said:
I tried flashing the stock rom with ODIN and the phone successfully boots now. So a big thanks for that as it is progress. BUT the issue I was orginally having persists: The device keeps turning off 10-20 seconds after booting. Do you have any idea why that might be?
Sometimes it will freeze first and then turn off but never stay on for longer.
I have tried Safe Mode and turning all connectivity related modules off.
Click to expand...
Click to collapse
This is weird don't know what the problem might be. Still I suggest you to flash it with smart switch once and see.

Galaxy S6 - freezing and rebooting 50+ times a day

I've got a Vodafone UK version SM-G920F that has recently started to freeze, crash and reboot constantly.
I managed to back up my data and perform a factory reset from the Setting page, but it crashed 10+ times during the install process (would freeze at various different stages, either rebooting on its own, or requiring a Vol Down+Power reset)
I'm now on a fresh install, but it's still rebooting constantly. I managed to use it like normal for an hour today, but right now it's just rebooted 3 times and won't even get past the Samsung loading screen without several Vol Down+Power resets.
What other options do I have? And is anyone aware of a known hardware issue that could cause this?
I was considering flashing a different ROM, but I'm scared it would reboot during the process and corrupt something...
robjg said:
I've got a Vodafone UK version SM-G920F that has recently started to freeze, crash and reboot constantly.
I managed to back up my data and perform a factory reset from the Setting page, but it crashed 10+ times during the install process (would freeze at various different stages, either rebooting on its own, or requiring a Vol Down+Power reset)
I'm now on a fresh install, but it's still rebooting constantly. I managed to use it like normal for an hour today, but right now it's just rebooted 3 times and won't even get past the Samsung loading screen without several Vol Down+Power resets.
What other options do I have? And is anyone aware of a known hardware issue that could cause this?
I was considering flashing a different ROM, but I'm scared it would reboot during the process and corrupt something...
Click to expand...
Click to collapse
Maybe a battery issue?
a friend just gave me his very same model phone with the very same issues.. if I find out anything I'll tell you here, or if you solve it first please write down what you did.
Thanks Vibbuz.
I've been trying to download a stock firmware to flash via Odin, but download speeds from Updato are really bad.
So I managed to flash a firmware after installing Odin on a Windows laptop (painful trying to get it to work on my Mac)
Firmware installed OK, but after boot I was getting a constant "com.sec.epdg" pop-up box that wouldn't let me use the phone at all. Not sure if that's due to the tsar3000 firmware?
Wiped the cache and did a factory reset after booting into recovery, and now it's stuck in a boot-loop again (95% of the time it hangs at the Samsung logo animation)
Just tried using SamFirm v0.3.6 to find the correct file. Downloaded a 4gb file, but several attempts to extract only gives BL, CP, CSC files but no AP (throws up an Unknown Error during process).
So still stumped!
Yet another update. Left Updato running overnight and downloaded a firmware.
Flashed it with Odin, claims to have succeeded but phone then reboots and hangs at "Erasing" stage (Android logo is spinning, then stops)
I'm starting to think it's pretty broken...
I've been having this exact same issue since June. If your phone happens to boot try activating power saving mode (to reduce cpu speed) as soon as possible.
It seems that doing that diminished the frequency in which my phone rebooted. If it also helps you it might be a faulty battery that can't provide enough voltage. (I'm not 100% sure on this part though, just thought of it because of the apple batteries drama)
Please post your results! Looks like a lot of people are affected by this and it would be great if we could find the cause of the problem.
I just read your thread actually! Sounds very similar to mine.
I've got nowhere. I don't think it's hard-bricked as I can still access Odin mode on the phone, and sometimes boots to Recovery, but it freezes and various different points and is currently unusable (either freezes at Samsung logo, "Erasing" part after installing firmware, or once it started to run though new device setup then froze).
Went ahead and bought an S8, but still want to fix the S6!
robjg said:
I've got a Vodafone UK version SM-G920F that has recently started to freeze, crash and reboot constantly.
I managed to back up my data and perform a factory reset from the Setting page, but it crashed 10+ times during the install process (would freeze at various different stages, either rebooting on its own, or requiring a Vol Down+Power reset)
I'm now on a fresh install, but it's still rebooting constantly. I managed to use it like normal for an hour today, but right now it's just rebooted 3 times and won't even get past the Samsung loading screen without several Vol Down+Power resets.
What other options do I have? And is anyone aware of a known hardware issue that could cause this?
I was considering flashing a different ROM, but I'm scared it would reboot during the process and corrupt something...
Click to expand...
Click to collapse
Does it have twrp? Try a non stock ROM and kernel
So did anyone manage to find an issue in this rebooting. I am having the same issue.
damir_nis said:
So did anyone manage to find an issue in this rebooting. I am having the same issue.
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Click to collapse
Hi I have same Problem I send the my s6 for repairmen that Saied me this problem related to mobile Hard drive.
I didn't believe it and try some official rom and a rom from Philippine GLB solve my problem for 3 M/o but now developed as same problem whitout any successful rom installation.
I think this problem from incompatibility google play store version to my rom. please flash a custom rom without google apps and immediately after installation turned off data and Wi-Fi internet after 2 day whit sim card whit out any change in setting can use it.
Hello,
anyone found some kind of solution? Happened to me also - freezing, restarts and then my S6 stopped working.. Sometimes I can boot to recovery menu, sometimes it boots up to android (and then freezes again), but the chances are almost non existing. Service man told me the same thing as @ghasemzm - eMMC failure. Yes, it is completely possible, but i don't wanna believe it, because they only tried to reflash the rom. I've made some "google research" and found that there were some issues in power IC on S6/S6E. Could this be related to it?
ghasemzm said:
Hi I have same Problem I send the my s6 for repairmen that Saied me this problem related to mobile Hard drive.
I didn't believe it and try some official rom and a rom from Philippine GLB solve my problem for 3 M/o but now developed as same problem whitout any successful rom installation.
I think this problem from incompatibility google play store version to my rom. please flash a custom rom without google apps and immediately after installation turned off data and Wi-Fi internet after 2 day whit sim card whit out any change in setting can use it.
Click to expand...
Click to collapse
Will test the theory and let the group know.
So i have installed philipines latest update 6.0.1 i think with PIT file provided on Sammobile.
I have tested it for a day with normal ussage like i set up every other phone and it still continued restarting.
Figured out let me test with no google account signed in and the phone is working perfectly. For a full day.
So i dont know what the problem is but i will try again with google account tomorrow for a day see what happens.
After that will install 7.0.1 uk update with PIT file for it and test with that.
I have the same problem and I am quite sure that it is the mobile hard drive.
I tried to use F2FS but didn't find a working rom for that.
Samsung refused repair because of root.... Never Samsung again!
same issues here - any solutions found? My best guess is hardware fault...

Samsung Galaxy S7 Stuck on Samsung Galaxy Logo

Hello again Xda community I really need some advice here because I'm unfortunately having problems with my phone at first it was a problem with it randomly crashing. In order to address that problem I did the following things - I prevented all apps from running in the background, I set several apps to run on the low data usage setting, and I even cleared the SIM toolkit cache as well as the individual caches of apps that I regularly use but for some reason my phone was still crashing. After installing the latest update my phone was stuck in a boot loop, it's stopped doing that, but it's now stuck on the Samsung galaxy logo screen.
You may have to flash your phone with Odin to fix the issue if you're stuck on boot loop and can't get pass it.
beevme said:
You may have to flash your phone with Odin to fix the issue if you're stuck on boot loop and can't get pass it.
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Click to collapse
Well, I've managed to turn my phone on again by pressing the power button and the up button, but I'm still having the problem in regards to my phone constantly crashing. One thing that I forgot to mention in my original post is the fact I also removed a large number of files which I was no longer using. I backed these files up by transferring them to my external hard drive even after doing that my phone was still crashing from time to time.
I'm not 100% sure, but It might have something to do with all of the data being kept in my internal storage instead of my SD card which isn't recognised.

S8+ freezes/reboots after a few minutes

Hello,
I have an S8+ and since an update i have the problem that the phone runs for
around 2-5minutes and then it freezes, the screen goes black and the phone reboots.
The phone does the same thing in the Recovery BUT NOT in Download Mode.
In Download mode the phone doesn't turn off or reboot by itself.
Factory resetting / Wiping did not solve the problem.
Installing the newest Stock Rom with Odin didn't solve the problem.
Installing an Oreo Stock Rom didn't solve the problem.
I tried many things but I'm not able to find a solution and I can't tell if it's a Hardware or Software problem.
It is unlikely a battery problem because it is fully charged and even while charging these problems will occur.
I tried firmwares from multiple sources but all ended up with the same result.
The phone boots, i can go through the Setup Wizard, log in to Google, connect to WiFi but after a few minutes of usage (usually less than 5 minutes) the phone freezes and reboots.
I have no warranty anyway so I can try out everything you can recommend me.
Thank you for any help!
KKenny1337 said:
Hello,
I have an S8+ and since an update i have the problem that the phone runs for
around 2-5minutes and then it freezes, the screen goes black and the phone reboots.
Thank you for any help!
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Click to collapse
Same Problem here. Not sure if anyone has a solution for it.
I tried flashing different ROMS via ODIN but it didn't help.
Also when in recovery mode, it gives some file / folder is missing / permission denied messages. (like unknown volume for path /odm) etc.
Any help / clue would be great help.

Debugging J7 Prime Restart issue

Pardon for a long story but someone gave this Samsung J7 Prime(SM-G610F) to me with an issue "An Error Has Occurred While Updating The Device Software". So I gave Samsung Smart Switch a try sadly they removed the Initialize option and old version don't seam to do what it suppose to do so I wen to a traditional Odin flashing. I then look for a stock rom for the phone that I think is the right one. Started with android 6 MM region pakistan and flashing went well. I was able to use it for a good hour or two until I notice it restarted by it self, then it keeps doing it 10-20 seconds after booting up. I though its the firmware I'm using so I went and look for Oreo version this time I region india (I don't know if region matters). So I flashed it again and tested the device again. I'm still able to use it for a good while till it restarted again. I then keep testing it to see what may be causing the problem. I notice that when the WIFI is on it just crash the phone to reboot so as soon as the phone reboots I turned the wifi off and it didn't crash anymore. I then factory reset the phone cleared everything, wipe cache then installed benchmark tools first. Thing I notice is it crashes when Google Play store is trying to install or download something. I tested it a couple of times to see when it crash and it does crash when downloading or installing something. I was still able to install 3Dmark and run it with wifi off. It completed the test without crashing so it couldn't the processor issue. I then look for another rom and tried flashing it. This time I had issue with it failing at system.img even if I use recent rom that worked. I then keep trying till flashing TWRP worked and flashing the rest of the rom is fine again.
What bothers me is why doesn't it crash during the first couple of hours. I've search similar issues and they say it may have been and app issue. I've already disabled bunch of app but nothing changed. Run the phone in safe mode but this time instead of crashing and rebooting right away it freezes for a few seconds. I suspect if google play or something being an issue since I've tried disabling it and it didn't crash for a couple of hours. Looked for allot of related thread but none of them seam to solve my problem.
I suspect either its the rom that I'm using and it can only be fixed by using the original rom, or its having a memory issue but don't know how to pin point it. Anyone can suggest on how I can debug this? I'm used to debugging things in real time and my knowledge with android is a quite slim but as a programming understanding the errors won't be a problem. I hope.
Edit: Hmm. Does copying kernel log with TWRP work or the kernel logs get overwritten every time the phone reboots? Because I see the kernet logs but don't see anything failing except for something saying SHUTDOWN but I don't think thats it. :S
Still no reply. :S I think its /system dismounting it self while doing a write operation. but it doesn't trigger until a certain amount of time after the phone is flashed or factory reset. I have to go to recovery and mount system back but that only happens on marshmallow. over version it remounts it self after the random reboot. After factory reset I'm able to install COD mobile and play a couple of match. after a long while it just decides to reboot.
I also tried z3x and after reading PIT from phone OK. the phone just reboots and flashing completes without it doing any flashing.

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