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Random bootloops and weird issues

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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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

Samsung Galaxy S6 randomly restarting / gets stucked

Hello guys!
I am encountering an issue with my Samsung Galaxy S6 G920I. The phone suddenly started to restart on its own every 30 seconds or so. After some restarts the phone started to get completely stuck in a randomly time matter, and the only way to take it out of there is by doing a hard reset (volume down + power buttons).
I tried everything. Did wipe cache and factory reset in recovery mode, flashed a new stock ROM with Odin several times but it is still doing that.
The stuck issue also happens on screens like "installing update" or "erasing", after doing the ROM flash with Odin.
Any thoughts?

richardcr23 said:
Hello guys!
I am encountering an issue with my Samsung Galaxy S6 G920I. The phone suddenly started to restart on its own every 30 seconds or so. After some restarts the phone started to get completely stuck in a randomly time matter, and the only way to take it out of there is by doing a hard reset (volume down + power buttons).
I tried everything. Did wipe cache and factory reset in recovery mode, flashed a new stock ROM with Odin several times but it is still doing that.
The stuck issue also happens on screens like "installing update" or "erasing", after doing the ROM flash with Odin.
Any thoughts?
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Click to collapse
Try device initialization using SamsungSmart Switch. it Should solve the problem. But that method wipes entire internal storage. So backup before you do anything,
Device initialization is something like resetting it to factory setting by clean install of the firmware.

Hi, could you fix it ? The exact same thing happened to me. I was using stock firmware (I never rooted it or anything) and it suddenly began to reboot by itself. It can be stuck in a bootloop for 2 straight days and then suddenly boot normally and use it for a couple hours until it starts bootlooping again. After a month of having this issues I decided to flash stock 7.0 firmware with ODIN and also with Smart Switch but after succesfully applying the update the phone reboots with the "installing system update" screen and then it gets to 32% and it says "erasing" after which it starts the bootloop once again. I'm stuck with a $500 paperweight. I'm afraid it could be something with the motherboard any help is greatly appreciated!

maxaditya said:
Try device initialization using SamsungSmart Switch. it Should solve the problem. But that method wipes entire internal storage. So backup before you do anything,
Device initialization is something like resetting it to factory setting by clean install of the firmware.
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HI! I just tried but it keeps doing the same thing

Team vievwer
cacha21 said:
hi, could you fix it ? The exact same thing happened to me. I was using stock firmware (i never rooted it or anything) and it suddenly began to reboot by itself. It can be stuck in a bootloop for 2 straight days and then suddenly boot normally and use it for a couple hours until it starts bootlooping again. After a month of having this issues i decided to flash stock 7.0 firmware with odin and also with smart switch but after succesfully applying the update the phone reboots with the "installing system update" screen and then it gets to 32% and it says "erasing" after which it starts the bootloop once again. I'm stuck with a $500 paperweight. I'm afraid it could be something with the motherboard any help is greatly appreciated!
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just personal message me

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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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...

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.

Galaxy S7 G930U Unlocked stuck in boot loop - already flashed successfully but no fix

I'm really hoping you guys can help me out here. This is an S7 I bought from a Best Buy when I visited the US in 2017, and I got the Unlocked version so I would be able to use it back in my home country. Unfortunately, this is the second time I've had trouble with it in a span of 4 months and the first time it was a hardware problem and ended up quite expensive to get fixed.
Today I was using my phone normally when I decided to use the Google instant translation to translate something on my computer screen. That caused my phone to freeze, restart, and then tell me I was using an unauthorized flash and it was going to be locked, or something like that. Even after restarting a few more times, the phone would never get past that screen. I proceeded to factory reset/cache reset and from then on the phone just got stuck in a boot loop.
I learned that the fix would be to flash the phone. After a lot of work I found the G930UUESACSI1-20190930144640 firmware (the XAA version, for Unlocked) and successfully used Odin 3.13 at the Download Mode screen to flash my phone. It then restarted, went back to the blue screen, started installing some updates, when it was 100% it restarted again. Unfortunately, the loop remained. Galaxy S7 logo first, then the Samsung logo, then it just repeats.
I have also tried turning the phone off with the Recovery screen shut down option (since I can't seem to be able to turn it off with the power button right now), wait a few minutes, then turn it back on. Nothing changed.
Please, does anyone have any insight into this? What else could I possibly try, or what could I be doing wrong? I really don't want to send it to repair yet again in such a short time.
Many thanks in advance.

gabeblack said:
I'm really hoping you guys can help me out here. This is an S7 I bought from a Best Buy when I visited the US in 2017, and I got the Unlocked version so I would be able to use it back in my home country. Unfortunately, this is the second time I've had trouble with it in a span of 4 months and the first time it was a hardware problem and ended up quite expensive to get fixed.
Today I was using my phone normally when I decided to use the Google instant translation to translate something on my computer screen. That caused my phone to freeze, restart, and then tell me I was using an unauthorized flash and it was going to be locked, or something like that. Even after restarting a few more times, the phone would never get past that screen. I proceeded to factory reset/cache reset and from then on the phone just got stuck in a boot loop.
I learned that the fix would be to flash the phone. After a lot of work I found the G930UUESACSI1-20190930144640 firmware (the XAA version, for Unlocked) and successfully used Odin 3.13 at the Download Mode screen to flash my phone. It then restarted, went back to the blue screen, started installing some updates, when it was 100% it restarted again. Unfortunately, the loop remained. Galaxy S7 logo first, then the Samsung logo, then it just repeats.
I have also tried turning the phone off with the Recovery screen shut down option (since I can't seem to be able to turn it off with the power button right now), wait a few minutes, then turn it back on. Nothing changed.
Please, does anyone have any insight into this? What else could I possibly try, or what could I be doing wrong? I really don't want to send it to repair yet again in such a short time.
Many thanks in advance.
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You need to clear the cache after flashing to get out of the boot loop.
Use the download key combo to restart. As soon as the screen goes black move to Volume up+home+power.
In the recovery menu choose clear/ Wipe cache, then choose reboot.

I apologize for not updating this thread before when it was still recent. The fact is that I didn't manage to fix my phone; clearing the cache after flashing did nothing to stop the loop.
I ended up taking the phone to the people who have fixed it in the past and after more than one month, they gave up. So I got my phone back and I want to try to give it another go before I just sell it for parts.
Unfortunately, my phone has come back even worse. Now it has no Recovery Menu to speak of, at least none that I can access; after a few seconds of the blue text on the top saying that it's entering recovery mode, it then proceeds to a blue screen saying: "Security Error: This phone has been flashed with unauthorized software and is locked.". I can still access Download Mode.
I have attempted flashing a few firmwares that I believe should have worked with my SM-G930U. Odin listed the attempts as "pass" and, after restarting and going back to the Download screen, it says the binary is Official. However, after trying to restart the phone normally, it starts displaying the blue screen again, and then, after going to Download mode, the binary is reverted to "Custom".
I believe right now the order of the day is to get the recovery menu to work again so I can do all the cache cleaning that seems to be required after flashing firmware. Any ideas at all on how I should proceed? Is there something specific I should download to fix the recovery menu?

How many files are you flashing in Odin, is it just 1 file in the AP slot, or 4 files: AP, BL, etc.? Also, is your phone rooted?

Drunkpilot said:
How many files are you flashing in Odin, is it just 1 file in the AP slot, or 4 files: AP, BL, etc.? Also, is your phone rooted?
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Never rooted, was using the phone legit before it froze and entered boot loop. I flashed all 4 files, multiple times.
Someone tried fixing my phone a few days after I replied to this thread and some progress seems to have been made, but now the phone cannot get past a black screen with a "SBL Error! rdx_init!" in red text, and "upload mode" in yellow text. Still cannot access Recovery Mode, but Download Mode still works.
I did a little Googling on rdx_init errors and it seems I need a firmware dump from another G930U or something like that...any ideas on how I can proceed?

Flash it with Eng Boot in all slots using patched Odin. Reboot to recovery and wipe it. Reboot system. Then root it with advanced adb root. Links for all of this are here in xda. Enjoy

STA1NL3SS said:
Flash it with Eng Boot in all slots using patched Odin. Reboot to recovery and wipe it. Reboot system. Then root it with advanced adb root. Links for all of this are here in xda. Enjoy
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Sorry, I'm not an expert at this by any means, I'm not sure what files to get. So far I've found and downloaded the following:
S7_Oreo_Nougat_Adb_Advanced_Root_V10
S7_Oreo_Nougat_Adb_Advanced_Root_V12
S7_Oreo_Su_Binary_Only_ADB_Root
But I had no luck flashing any of these cause my binary is 10. Is there any more help you can provide me? I really don't know how to proceed

gabeblack said:
Sorry, I'm not an expert at this by any means, I'm not sure what files to get. So far I've found and downloaded the following:
S7_Oreo_Nougat_Adb_Advanced_Root_V10
S7_Oreo_Nougat_Adb_Advanced_Root_V12
S7_Oreo_Su_Binary_Only_ADB_Root
But I had no luck flashing any of these cause my binary is 10. Is there any more help you can provide me? I really don't know how to proceed
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I thought I had one in my phone, but I don't. If you look at the thread where you downloaded the Root_V12, you will see it. It's near the end of the thread somewhere.