Samsung S6 Boot Loop - Galaxy S6 Q&A, Help & Troubleshooting

Hi,
Apologies if this has been asked before, but I've done a relatively thorough search and I can't find a solution to this problem.
I have an S6 (SM-G920F), It was playing up for a few weeks before this, not charging well, and what not, thought it was a cable/hardware issue. Then it stopped working entirely. Initially when it was plugged into the wall it would say it was 91% charged, but if you tried to turn it on it would turn off, and reboot into the charging screen.
I've done quite alot of reading and I've ended up flashing it with Odin (I have a single .md5 file, which i've loaded onto the phone via AP) using the most recent FIrmware UK EE for the SM-G20F. This was successful, however now it only loads the Black screen with white text Samsung S6 powered by android screen and then goes blank and back to the white text screen.
I downloaded an alternative firmware (the one previous version), but this has had the same effect. I've tried to repartition with odin, but this fails.
1.) Is there anyway I can fix this?
2.) If not Is there anyway to remove files whilst in downlod mode?
3.) If I cannot fix it or recover my data, is there anyway to wipe the data securely from my phone so I can sell it for parts?
At present, I can't access recovery mode, only download mode. But whilst Odin communicates with the phone in download mode, I can't seem to access my files from explorer?

1. I would say you'd have to clear cache, immediately after flashing the firmware with Odin, but to do that, you'd have to get to Recovery Mode first...
Why can't you get to it? Does it just start trying to boot nornally? Because if so, it's just a matter of timing it. What I do is... hold power+home+voldown to get to the screen that asks me if I want to get into Download Mode, I press cancel, and immediately start holding power+home+volup until I see the bootsplash screen, and release the power button but keep holding home+volup, and it gets me to Recovery every time, even when I have difficulties such as this.
2. Not that I'm aware of. BUT you could flash TWRP with Odin, and if you then can manage to get to Recovery, you just need to plug your phone into a computer, and your phone will show up in the computer as a device/disk and you can freely remove stuff from it.
If... IF this were to work, I would suggest downloading a stock-based ROM and flashing it. It's far more likely to work properly and bootup without issue than the firmwares you can get, and it's far less much of a headache to do.
3. Nope. There are apps that can wipe data securely (such as Shreddit which does it according to military standards), but it can't be done from Download Mode. There may be some script that could do it in Recovery Mode, but I doubt it.
I mean... technically... you could flash TWRP, go to Recovery, move to your PC all the stuff you want to keep, select the wipe option in TWRP and then transfer randomly generated data from your PC to your phone until it's full - there are many apps that can generate such data. It's not something you could pass off as very very secure, but it should suffice.
I seem to always keep going to trying TWRP - so, you know, give it a shot.

King-V said:
1. I would say you'd have to clear cache, immediately after flashing the firmware with Odin, but to do that, you'd have to get to Recovery Mode first...
Why can't you get to it? Does it just start trying to boot nornally? Because if so, it's just a matter of timing it. What I do is... hold power+home+voldown to get to the screen that asks me if I want to get into Download Mode, I press cancel, and immediately start holding power+home+volup until I see the bootsplash screen, and release the power button but keep holding home+volup, and it gets me to Recovery every time, even when I have difficulties such as this.
2. Not that I'm aware of. BUT you could flash TWRP with Odin, and if you then can manage to get to Recovery, you just need to plug your phone into a computer, and your phone will show up in the computer as a device/disk and you can freely remove stuff from it.
If... IF this were to work, I would suggest downloading a stock-based ROM and flashing it. It's far more likely to work properly and bootup without issue than the firmwares you can get, and it's far less much of a headache to do.
3. Nope. There are apps that can wipe data securely (such as Shreddit which does it according to military standards), but it can't be done from Download Mode. There may be some script that could do it in Recovery Mode, but I doubt it.
I mean... technically... you could flash TWRP, go to Recovery, move to your PC all the stuff you want to keep, select the wipe option in TWRP and then transfer randomly generated data from your PC to your phone until it's full - there are many apps that can generate such data. It's not something you could pass off as very very secure, but it should suffice.
I seem to always keep going to trying TWRP - so, you know, give it a shot.
Click to expand...
Click to collapse
Thanks for your reply! So after flashing it goes straight back into the boot loop. Weirdly if its plugged into my laptop it spend about a second or two on the "Samsung Galaxy S6: Powered by Android" screen before plunging into darkness and shortly after repeating the same message. However if I plug it into the wall it spend over twice as long on that screen before repeating the cycle. It never goes any further.
I've tried your suggestion about perhaps its timing for recovery mode, but even if I go straight from cancelling download mode to trying the power, up and home key it doesn't go to recovery. I've tried a variety of timings both plugged into my laptop and plugged into the wall to no avail. If the phone isn't plugged in, it literally won't do anything whatsoever, won't even hint at turning on.
So Next I tried flashing it with TWRP via Odin and nothings changed, exactly the same bootloop and I still can't get into recovery mode.
I'm starting to think that sadly this phone my be beyond repair! Thanks for your help though, much appreciated.

Hi! I usually run out of my bootloops like this:
try this:
1: go to download mode, and press Power + home + volume —
2: As soon as the screen turns black, continue pressing Power and home, quickly release "volume —" and press "volume +". This will get you into recovery mode.
It always worked for me, so I wish the same for you. Good luck! (And sorry for my bad english)

vinicius_guerra said:
Hi! I usually run out of my bootloops like this:
try this:
1: go to download mode, and press Power + home + volume —
2: As soon as the screen turns black, continue pressing Power and home, quickly release "volume —" and press "volume +". This will get you into recovery mode.
It always worked for me, so I wish the same for you. Good luck! (And sorry for my bad english)
Click to expand...
Click to collapse
Hi Vinicius,
Thanks for the suggestion. Unfortunately it didn't work, I even tried flashing it back to a standard ROM from TWRP, but it still didn't do anything, just back to the Samsung logo and the loop continues ever more!

Hi, I have this problem as well.
Originally I had TWRP and root flashed into my phone but for reasons I needed to remove root.
So I followed the Odin route stated here "Mobikin how to remove root from android" (I can't post links but this should be the top result when googling)
However I didn't know if the recovery/boot should have went into AP or BL on the Odin menu and googling didn't give me any answers so I may have tried both....
Right now I tried flashing TWRP and I can't seem to boot into TWRP as well.
I was able to get into recovery mode but clearing data/cache didn't fix it for me.
EDIT: I managed to flash in another stock rom and it boots into the SAMSUNG logo but gets stuck there. I already went into recovery mode to delete data and cache partition but it still doesn't boot.

Melioetta Zyguard said:
Hi, I have this problem as well.
Originally I had TWRP and root flashed into my phone but for reasons I needed to remove root.
So I followed the Odin route stated here "Mobikin how to remove root from android" (I can't post links but this should be the top result when googling)
However I didn't know if the recovery/boot should have went into AP or BL on the Odin menu and googling didn't give me any answers so I may have tried both....
Right now I tried flashing TWRP and I can't seem to boot into TWRP as well.
I was able to get into recovery mode but clearing data/cache didn't fix it for me.
EDIT: I managed to flash in another stock rom and it boots into the SAMSUNG logo but gets stuck there. I already went into recovery mode to delete data and cache partition but it still doesn't boot.
Click to expand...
Click to collapse
Same experience. For all those 6 years that I used this device, the wifi was okay until now. It (wifi) is very buggy (turning on and off, and sometimes won't turn on at all) so I restarted the device, then bootloop happens. I flashed the stock rom via odin and clear data and cache. But it is still bootlooping. I think this is the sign that I need to replace my phone IF I couldn't find a fix to this.

Related

[Q] Unable to factory reset

Yesterday my phone started acting up. All running process crashed and not many was able to start. I had to constantly click "force close". I think this started after I installed the Google+ app, but not sure.
I have tried uninstalling all unnecessary apps, without luck. I then tried wiping to factory settings by using the Android menu, but without any changing. I then tried by holding vol+ and power, going in to recovery and wiping both to factory and app cache. This doesn't change anything either. By googling I can see some suggests to hold vol- and power, to get to a another wiping-functionality but this just boots my Nexus S to normal state - no menu appears.
Has anybody an idea of what I can do?
Edit: more info; if I click "Report" and investigate the message sent to Google, I see that error has something to do with SQLite-relatet classes. Which makes some sense, alot of my changes are reset each time the phone is rebooted. For instance did I miss a call a couple of hours before the phone went crazy - this is shown at each boot in the notification area eventhough I clear the area and/or goes to missed call section
Factory reset via menu does delete all your "custom" apps, so I'd say it's not one of the existing apps causing problems.
The way you describe function after your factory reset sounds like factory reset didn't work properly.
If you feel safe I'd recommend rather flashing 2.3.4 again using either Odin or the OTA zip from Google (requires open bootloader).
I think you're right that factory reset doesn't do what is expected. Once I click it, the phone reboots and shows the Android guy next to an unwrapping package. This lasts only 2 seconds, then it reboots itself again and goes into normal phone mode (where all the app-crashing starts again).
I have not flashed or rooted my phone before, but I will consider this now since my NS is pretty much a brick. Thank you for your swiftly response.
Edit: Shouldn't I get a menu, when I push and hold vol- button, while turning on the device? Right now it just boot as normal.
Before you use odin....try going into rom manager a reflashing clockwork! Ive had that android dude on my screeen but reflashibg via rom manager always fixed it. Try that
Sent from my Nexus S using XDA Premium App
Wow my Nexus has totally shut me out.
I cannot use ClockworkMod unfortunately since I am not able to root my phone. It is not detectable via USA (when I use vol+/pwr and connect USB). I am unable to check the USB Debugging option on the phone. Each time I check it, go to home-screen and back to the menu, it has de-selected it again. Also I noticed when I read the info that is sent to Google for all those app-crashes I get, I see SQLiteException and error in an SQLite.java file. So it seems like some database layer is broken.
I read one could copy the ClockWork.img to my phone and use the standard recovery option to flash the img (I think). But when I go into the recovery menu, the file is gone. When I boot the phone again, it has deleted the .img file - eventhough if I copy it to several different folders, they are all gone :-(.
I feel pretty screwed at the moment. How can I else wipe all data?
I'd recommend to check if your device is correctly identified in windows. Missing USB drivers might cause problems. Get the latest drivers and a guide from here.
If you succeed booting into fastboot properly (vol up and power) you can follow this guide. Get the latest cwm recovery.img here.
Last option would be to boot into download mode (vol up + vol down + power + plugging in usb cable) and use Odin from samfirmware.com
--
All options require correctly working USB drivers.
I managed to unlock the bootloader, by quickly turning on USB-debugging (before any processes started to crash) and install the drivers from this post:
http://forum.xda-developers.com/showpost.php?p=6819751&postcount=4
A reboot later, I got this message:
"System UIDs Inconsistent
UIDs on the system are inconsistent, you need to wipe your data partition or your device will be unstable."
Right below was a button saying "Im feeling lucky" (??)
I installed ClockworkMod using fastboot and tried "Fixing permissions" with no luck. I will try some ROM later on, and hope it will bring my phone back
Normally this error happens when you have a faulty app ruining your system, formating/deleting whole sdcard does usually fix this.
rentaric said:
Normally this error happens when you have a faulty app ruining your system, formating/deleting whole sdcard does usually fix this.
Click to expand...
Click to collapse
I can safely mount USB-storage and format the whole bunch?
I been sweating over this stupid issue all day now, all I want is a fac-reset :´(
Edit: "format /sdcard" using CWM didn't do anything
DennisRP said:
I can safely mount USB-storage and format the whole bunch?
I been sweating over this stupid issue all day now, all I want is a fac-reset :´(
Edit: "format /sdcard" using CWM didn't do anything
Click to expand...
Click to collapse
See I'm no expert on this whole thing. At this point I'd just flash a whole new system via Odin. Prolly not the smartest or safest option, but that's what I'd do because I don't know better. If that wouldn't fix it either, I'd return the phone on warranty
I was looking at Odin from the start, since nothing else seemed to be working.
So right now I got started on Odin. Followed the .pdf steps and flashed the bootloader at first succesfully. I was asked to remove the battery and re-connect my NS. Began downloading "pda" and "phone", but at around 10% a big fat red "fail" message appeared and now I just see the Google-logo on startup. I still cant flash any roms via fastboot.
Im too tired too right now, been working with this for 14 hours straight. I will look at it tomorrow evening. Thanks for your help rentaric
Weird, you're not the first one who had trouble running Odin using their guide.
Overall it's pretty simple.
Enter download mode. Vol up vol down and power at the same time while plugging in the USB cable. Start Odin, should show a yellow colored box with a port number. Uncheck everything but reset timer and auto reboot. Unzip the correct zip file from samfirmware.com (check if you got i9020 or i9023 and get the universal Odin exe), apply file from the folder accordingly. Bootloader and bootloader. Phone and modem. Pda and pda. Csc can remain empty (will change carrier info in fastboot).
Double check md5 hash to avoid broken files.
Sent from my Nexus S using XDA App
rentaric said:
Weird, you're not the first one who had trouble running Odin using their guide.
Click to expand...
Click to collapse
Of course I did not go to bed, how should I be able to sleep with a broken phone .
The firmware suggested on samfirmware.com for my phone, was 2.3.3 and some other version (my phone was 2.3.4.2/GRJ22 or something similar, I suspect that might be the cause. Also I unchecked everything, that might also have been of importance). The flash will always fail when everything was downloaded - it then said something about "remote" and "Loke" and then fail. But as I mentioned, I had succesfully flashed boot.img (2.3.3) thus no boot occured now. I googled the correct bootloader, used fastboot and was booting succesfully again.
I began looking more into the sdcard, as error-messages was leading me this way. To compress 4 hours of investigations into a few lines, it seems as my PBA is malfunctioning as other xda-members have experinced. Only solution is sending the phone to Samsung for a PBA replacement. I purchased the phone in Bestbuy USA and the danish Samsung partners are not too joyfull about this - I will contact Samsung and hope they can help me.
I experinced the exact same thing as this poor guy - http://forum.xda-developers.com/showthread.php?t=993403
Every thing you try to do to /sdcard is worthless.
Formatting (USB/using CWM/using adb shell linux commands) says "Succes" but nothing happens.
Copying files says "Succes" but nothing happens. If I boot phone into CWM, mount usb and upload new rom/apk/whatever and try to do a "install update.zip" it fails with some mounting errors.
Im ready to go cry in a corner - I really want this to be fixable via software, but I probably have to realize that this is a hardware issue.
Apparently Samsung doesn't offer worldwide warranty for cellularphones :´(. God it sucks to pay repair-expenses on a 1 month old mobile.

[Q] Bootloop! Tried ODIN

Hi,
So I got a bootloop after wiping battery status on recovery. But first I wiped cache and dalvik cache (i dont know why i did this). Now, Im on a boot loop and I cant even turn the phone off. I take the battery out and plug it back in and it just loops. Same with taking the battery out and plugging a usb. SO I successfully got to Download mode and got ODIN to recognize the phone. I installed Clockwork
Mod Touch 5.8.1.3 Odin tar. and it says it was succesful, but no luck! Still loops. Is there another .TAR file I can install???
PS: I cant get into Recovery because phone does not turn off.
Please any input is much appreciated, this is driving me nuts.
Wiping battery stats, cache and Dalvik shouldn't cause a bootloop. Wiping Dalvik does cause a very long boot cycle, though, as it causes the system to think it's got all-new apps, and it has to re-process and re-cache them. Are you sure that's not what's going on? How long are you letting it sit for?
Also, are you sure you don't have a stuck power button? I doubt it because you were able to get into download mode and flash a recovery img, but have you tried mashing the button down over and over, even cleaning around the edges of the button with a needle?
mex2309 said:
Hi,
So I got a bootloop after wiping battery status on recovery. But first I wiped cache and dalvik cache (i dont know why i did this). Now, Im on a boot loop and I cant even turn the phone off. I take the battery out and plug it back in and it just loops. Same with taking the battery out and plugging a usb. SO I successfully got to Download mode and got ODIN to recognize the phone. I installed Clockwork
Mod Touch 5.8.1.3 Odin tar. and it says it was succesful, but no luck! Still loops. Is there another .TAR file I can install???
PS: I cant get into Recovery because phone does not turn off.
Please any input is much appreciated, this is driving me nuts.
Click to expand...
Click to collapse
U should definitely go back to stock via odin first before even trying to install cwm and flashing a custom rom.
Sent from my SGH-I727 using xda app-developers app
T.J. Bender said:
Wiping battery stats, cache and Dalvik shouldn't cause a bootloop. Wiping Dalvik does cause a very long boot cycle, though, as it causes the system to think it's got all-new apps, and it has to re-process and re-cache them. Are you sure that's not what's going on? How long are you letting it sit for?
Also, are you sure you don't have a stuck power button? I doubt it because you were able to get into download mode and flash a recovery img, but have you tried mashing the button down over and over, even cleaning around the edges of the button with a needle?
Click to expand...
Click to collapse
I left it on the loop for about 2:30 hours. Still nothing- I cleaned around the power button by taking the case off. Everything looked fine but it still loops. Once I was able to get to Recovery mode but I could only scroll down one line before the phone flashes and goes back to the first command line. This leads me to believe that theres something wrong with the power button, its stuck or a short. Also, I still can't turn if off, as soon as I put the battery in- it turns on w/o me pressing the power button.
I think its a gonner...
I left it on the loop for about 2:30 hours. Still nothing- I cleaned around the power button by taking the case off. Everything looked fine but it still loops. Once I was able to get to Recovery mode but I could only scroll down one line before the phone flashes and goes back to the first command line. This leads me to believe that theres something wrong with the power button, its stuck or a short. Also, I still can't turn if off, as soon as I put the battery in- it turns on w/o me pressing the power button.
mex2309 said:
I think its a gonner...
Click to expand...
Click to collapse
It's alive! Finally i got it to boot up. I don't know how or why. I tried to go to Recover mode and this time I got in and was able to cycle through the menu. I reinstalled the latest ROM I used and it booted up. Strange.... but I'm happy.
mex2309 said:
I left it on the loop for about 2:30 hours. Still nothing- I cleaned around the power button by taking the case off. Everything looked fine but it still loops. Once I was able to get to Recovery mode but I could only scroll down one line before the phone flashes and goes back to the first command line. This leads me to believe that theres something wrong with the power button, its stuck or a short. Also, I still can't turn if off, as soon as I put the battery in- it turns on w/o me pressing the power button.
It's alive! Finally i got it to boot up. I don't know how or why. I tried to go to Recover mode and this time I got in and was able to cycle through the menu. I reinstalled the latest ROM I used and it booted up. Strange.... but I'm happy.
Click to expand...
Click to collapse
Glad you got back into your phone. I am starting to see this happening a lot lately with ROMS. Which particular one were / are you on when it started the boot loop?
MasterDecker said:
Glad you got back into your phone. I am starting to see this happening a lot lately with ROMS. Which particular one were / are you on when it started the boot loop?
Click to expand...
Click to collapse
Sounds similar to what I just went through... Except I didnt do anything in recovery before mine started looping. Curious to know what rom you were running as well.
MasterDecker said:
Glad you got back into your phone. I am starting to see this happening a lot lately with ROMS. Which particular one were / are you on when it started the boot loop?
Click to expand...
Click to collapse
I was on the Seanscreamz' ICS ROM. I never had a problem with his ROMs before and I've been using them for about a year. They are pretty solid and I recommend them. It had to do something with me wiping caches and wiping battery stats because it happened shortly after. But I'm just guessing.
mex2309 said:
I was on the Seanscreamz' ICS ROM. I never had a problem with his ROMs before and I've been using them for about a year. They are pretty solid and I recommend them. It had to do something with me wiping caches and wiping battery stats because it happened shortly after. But I'm just guessing.
Click to expand...
Click to collapse
I'm trying to wrap my head around that, and not coming up with anything valid. Wiping the caches would cause a much longer boot time, battery stats, at most should only cause you to need to remove and reinsert the battery.
Just about the only thing I could come up with would be that when you wiped the caches, was that your phone was trying to reload all that data back into the cache and was getting brain dead.
More information is needed from others that have had the same issue, on the same ROM, or different does not matter, but detailed info as to what exactly was done prior to the boot loop issues.
If my phone gets stuck in a boot loop, usually after I flash someting in Odin or whatever, if I hit factory reset it fixes itself.
It doesn't bother me since all my stuff is backed up though.
You should Odin back to stock then flash cwm
Sent from my SAMSUNG-SGH-I727 using xda app-developers app
just got a phone off of craigslist.. saw that it booted up, so i figured i might be able to fix it. cost me $100.
just finished ODINing it, but it just continues to bootlop. not sure what to do next.
Flash a recovery in Odin and see if you can enter recovery. Wipe data/factory reset if you get there.
hechoen said:
Flash a recovery in Odin and see if you can enter recovery. Wipe data/factory reset if you get there.
Click to expand...
Click to collapse
already did that.. flashed CWM, ran recovery and installed rom. no go. now i see the cyanogen boot screen, but it won't get past that. this is kind of strange.
i think the issue with this phone is hardware related. constantly the phone turns itself off. i eventually was able to get stock rom to work (not sure how), but it goes haywire. wifi works, but for whatever reason, i can't download from the play store.
also, when im in CWM.. it reboots randomly. sometimse pressing the power button hits twice too. my old i777 has gone haywire too.. i might have to rethink what i will be choosing for my next phone.
mistabeo said:
i think the issue with this phone is hardware related. constantly the phone turns itself off. i eventually was able to get stock rom to work (not sure how), but it goes haywire. wifi works, but for whatever reason, i can't download from the play store.
also, when im in CWM.. it reboots randomly. sometimse pressing the power button hits twice too. my old i777 has gone haywire too.. i might have to rethink what i will be choosing for my next phone.
Click to expand...
Click to collapse
I did what I could to try to replicate your situation. Which version of CWM are you installing? I went through several different versions up to the latest and found that the phone was having an issue with CWM itself. (possibly corrupted driver, but not 100% sure on that, as the phone does get recognized by the computers.)
But when I got to the latest CWM, and it started doing similar to yours, what I did was the following.
#1 : reinstall drivers
#2 : plugged the phone into the USB 2.0 slot on my laptop.
#3 : removed the battery, sim card, SD card
#4 : tried to power on the phone holding the power button for approximately 20 seconds. (nothing)
#5 : put in the battery while still plugged in, and powered on.
#6 : After phone booted up, and computer recognized the phone, I removed the battery. Phone stayed on.
#7 : waited while the computer re installed the ADB drivers, after driver install success, I unplugged the phone. Of course it powered down.
#8 : Restarted the laptop, put the battery back in the phone, and held vol + and - and power. Phone rebooted into recovery, but got into a boot loop when trying to recover.
#9 : downloaded TWRP recovery and put it on the SD card for the phone. Restarted the phone into recovery and installed TWRP recovery.
#10 : Rebooted phone into TWRP recovery. wiped all cache, installed latest STOCK ROOTED ROM.
The phone has been stable and working just fine, no wifi or blue tooth issues, calls are as normal, texting is as normal. LTE speeds as normal.
I have since switched all my devices over to TWRP recovery and have had ZERO issues.

[Q] Help! My phone is in a bootloop. Unable to stay in download/ recovery mode...

I'm really stupid.
I started when I flashed Cyanogenmod from 10.1 to 10.2 and started getting random resets. After getting impatient, I stupidly tried to downgrade back to 10.1 without a factory reset which caused the bootlooping. Then I tried going going into recovery mode and tried to restore with cwm recovery but my phone just randomly shutdown.
tl;dr Now I can't enter into recovery mode at all (I can see the blue words then it shuts off), can enter download mode for maybe 4-6 sec before it shuts off, and my phone still bootloops if I try to properly turn it on.
Can anyone help me?
john2166 said:
I'm really stupid.
I started when I flashed Cyanogenmod from 10.1 to 10.2 and started getting random resets. After getting impatient, I stupidly tried to downgrade back to 10.1 without a factory reset which caused the bootlooping. Then I tried going going into recovery mode and tried to restore with cwm recovery but my phone just randomly shutdown.
tl;dr Now I can't enter into recovery mode at all (I can see the blue words then it shuts off), can enter download mode for maybe 4-6 sec before it shuts off, and my phone still bootloops if I try to properly turn it on.
Can anyone help me?
Click to expand...
Click to collapse
take out batter for couple mins .put it back in . pres hold power home vol up .. sometimes takes couple tries to get into recovery mode . factory reset flash rom correct gapps ..first boot sometimes takes couple mins . remember nightlies are betas not all play well
twistedillutions said:
take out batter for couple mins .put it back in . pres hold power home vol up .. sometimes takes couple tries to get into recovery mode . factory reset flash rom correct gapps ..first boot sometimes takes couple mins . remember nightlies are betas not all play well
Click to expand...
Click to collapse
Thanks for trying to help, but it didn't work. Tried it many times, but I did get to the "Samsung Galaxy S III" logo after recovery mode.
Also to clarify, I wasn't a nightly it was a stable version of Cyanogen. It's just that your not suppose to directly downgrade a Cyanogenmod without a factory reset or it could cause problems, which I found out later.
Edit: It's getting late so I'm going to check back in the morning. Thanks.
john2166 said:
Thanks for trying to help, but it didn't work. Tried it many times, but I did get to the "Samsung Galaxy S III" logo after recovery mode.
Also to clarify, I wasn't a nightly it was a stable version of Cyanogen. It's just that your not suppose to directly downgrade a Cyanogenmod without a factory reset or it could cause problems, which I found out later.
Edit: It's getting late so I'm going to check back in the morning. Thanks.
Click to expand...
Click to collapse
You said you could enter download mode and stay there? If so i highly suggest you go and ODIN your phone back to stock re-root, install recovery then go ahead and install CyanogenMod. This most likely ill fix your problems, but only do it if your phone can go into download mode and stay there!
Mtsprite said:
You said you could enter download mode and stay there? If so i highly suggest you go and ODIN your phone back to stock re-root, install recovery then go ahead and install CyanogenMod. This most likely ill fix your problems, but only do it if your phone can go into download mode and stay there!
Click to expand...
Click to collapse
No unfortunately my phone can't stay in download mode. At least not long enough to use odin.
john2166 said:
No unfortunately my phone can't stay in download mode. At least not long enough to use odin.
Click to expand...
Click to collapse
If you remove the battery and put it back in does it auto turn on?
I am curious to see what others here think, but in my limited experience with embedded devices, this is almost sounding like a hardware problem.
The phone was randomly rebooting before -- I don't think it was established earlier that recovery and download modes were solidly working when the conditions started. From your description, the symptoms appear sometime after the CM 10.2 upgrade, but that does not mean the upgrade or downgrade caused this issue.
It sounds odd to me that the phone would go into download mode, and then just sporadically reset. Perhaps others here can comment if this behavior in download mode has been observed with other botched software flashing.
I am just curious, and just verified on my S3. Try the following:
- boot into download mode, but leave the warning screen active. See how long that lasts or if you get reset quickly
- Plug the phone into a power source, boot into download mode, confirm, immediately remove the battery, and let the phone sit to see if it resets.
What I am looking to see is if a steady power supply here helps keeping download mode active; maybe your battery is shot and causing erratic behavior. Also, try to make a careful inspection of the phone, especially if all the screws are tight, the battery compartment doesn't have anything loose or funny looking, power button seems to be snappy and crisp (not mushy or sticking), etc.
Good luck.
ThePagel said:
If you remove the battery and put it back in does it auto turn on?
Click to expand...
Click to collapse
Kind of. It shows the Samsung logo when I put it it in. It only goes into a bootloop if I hold the power button for a few seconds.
vax1170 said:
I am curious to see what others here think, but in my limited experience with embedded devices, this is almost sounding like a hardware problem.
The phone was randomly rebooting before -- I don't think it was established earlier that recovery and download modes were solidly working when the conditions started. From your description, the symptoms appear sometime after the CM 10.2 upgrade, but that does not mean the upgrade or downgrade caused this issue.
It sounds odd to me that the phone would go into download mode, and then just sporadically reset. Perhaps others here can comment if this behavior in download mode has been observed with other botched software flashing.
I am just curious, and just verified on my S3. Try the following:
- boot into download mode, but leave the warning screen active. See how long that lasts or if you get reset quickly
- Plug the phone into a power source, boot into download mode, confirm, immediately remove the battery, and let the phone sit to see if it resets.
What I am looking to see is if a steady power supply here helps keeping download mode active; maybe your battery is shot and causing erratic behavior. Also, try to make a careful inspection of the phone, especially if all the screws are tight, the battery compartment doesn't have anything loose or funny looking, power button seems to be snappy and crisp (not mushy or sticking), etc.
Good luck.
Click to expand...
Click to collapse
Thanks. I've tried what you asked with and without the battery, and the warning screen stays on for about 3-7 secs for both circumstances. I also tried replacing my battery with another one lying in my house. The battery compartment and the power button is seemingly normal.
Doesn't help ... but this other thread sounds a little bit similar to your download mode issue ... http://forum.xda-developers.com/showthread.php?t=2608201
Sounds like you have a very small window of opportunity before the download mode reboots. Maybe try this just to see:
- make sure your windows (assuming) drivers are all set up. Hopefully if you had ODIN working already, then you are set
- get a copy of heimdall command line version
- get the command ready to execute: heimdall print-pit --no-reboot
- In the small window of opportunity you have ... enter download mode, confirm, press enter on heimdall command and see if anything interesting happens
See if you get anything. If you do you might try to quickly use up-arrow on the CMD line to recall that command and run it again. If you know anything about windows batch scripting, you might try scripting the heimdall command above in a loop.
My thought here is that if heimdall cannot initiate anything useful, then your software is probably lost. If heimdall can output the PIT data, could be that download mode software is good, but the hardware is bad. If rapidly executing heimdall keeps your device active longer than usual, that might be an interesting tid-bit to know.
I am no expert here, so please seek other's more expert advice before trying anything. If your boot mode is screwed, perhaps the thread on [GUIDE] Debrick your bricked s3! [BOOTLOADER/HARDBRICK] might work, but again unless someone else confirms this, I would not try that until you are about ready to accept total loss.

bootloop and no recovery

Good day.
Thanks fore reading my post.
I had root on my phone like for 3 or 4 months. everything was great and all. I did not dwell in any ROM installing or playing with the firmware.
But I am not sure what I did that this happened.
When I restarted my phone, I experienced everything until the Logo faded to the rotating circle(loading). And it stays there. Always.
I did check on many sites and it seems to be a bootloop. I tried going into recovery, used every button combination possible(I have only 3 and also tried and for my phone and for others to work) and I can't.
It just continues normally and to the position I explained before.
I have a Vodafone Smart 4 Max and even though I want the fix for my phone, I know there are other users that also experience/experienced this problem on different phones.
Might there be a way to fix this?
Thank you for your time
EDIT:: I managed to enter in recovery mode and tried a hard reset of the android. The situation is still the same, the bootloop remaining
Go to bootloader and flash factory firmware with fastboot
I wish I could. I have no idea how to access the bootloader(as I see no function like that).
I only have 4 options:
1).Reboot system now
2). Wipe Data
3)Wipe Cache
4). Recovery from back-up on SD (which I am stupid and don't have)
andreinit said:
I wish I could. I have no idea how to access the bootloader(as I see no function like that).
I only have 4 options:
1).Reboot system now
2). Wipe Data
3)Wipe Cache
4). Recovery from back-up on SD (which I am stupid and don't have)
Click to expand...
Click to collapse
How did you get to recovery? Wasn't it through bootloader? I found the information you get into bootloader like this: (power off) press and hold "end call"+"power on"+"volume up". If it doesn't work try the same but with "volume down". I guess you tried it, but you never know (plus I've got a feeling you can flash new rom with option 4 you've got there)
minimale_ldz said:
How did you get to recovery? Wasn't it through bootloader? I found the information you get into bootloader like this: (power off) press and hold "end call"+"power on"+"volume up". If it doesn't work try the same but with "volume down". I guess you tried it, but you never know (plus I've got a feeling you can flash new rom with option 4 you've got there)
Click to expand...
Click to collapse
Hm, I know what you are saying. For me to enter in recovery mode though, I needed to do the following.
1). Fully shutdown the phone for like 30 seconds
2). Volume UP + power button until the first logo with android appears
3). Let the buttons go and I enter
The problem is that adb and fastboot don't see my device at all. I have been tweaking with the drivers for so long, thinking that may be the cause, but I have no results.
And I can use the backup thing to flash a new rom? It requests an update file though, not an image(a zip file)
I think this is about your phone, maybe it will point you in the right direction:
https://www.youtube.com/watch?v=bKHEZbj4NHo
They are figuring out firmware installation on a similair model here: http://forum.xda-developers.com/android/help/stock-rom-vodafone-888-t3002958

Bricked when returning to stock (No command)

Hey guys,
decided to flash the latest DBT Firmware via Odin to get back to stock completely. (G930FXXU3ESA3)
After flashing the firmware through Odin the phone reboots and then installs an update and erases data (blue background).
After a second reboot I end up with a blue screen and the simple error: "No command".
I can not get into recovery, as I end up with the same error message wether booting into recovery or the system.
I CAN however get into downloadmode and flash twrp, after that I can boot into system but I want to keep the whole system vanilla, without TWRP.
Installing TWRP keeps the device encrypted, no matter what. I can wipe, then install no-verity-encrypt and as soon as I reboot the device is encrypted again.
Ive tried: Different Firmware Version (December 2018), 3 different cables, different odin versions.
Edit: attached an Image of the message that Pops up after about 30sec on the no command screen.
Ok, so your device will take UK Unbranded BTU firmware. You can get it from a few sources and even direct from Samsung servers with Samtool.
Forget all that flashing TWRP and non verify nonsense, if you can get into download mode you can flash firmware, obviously make sure the firmware downloaded is not corrupt etc.
I've used Odin V10 -13 to flash BTU and every version flashed it correctly. Sometimes you do get that "installing update" and then "erasing" but that's fine just leave the phone for a few minutes it should eventually reboot normally.
FLASH No verity.zip
VIA TWRP
https://forum.xda-developers.com/attachment.php?attachmentid=4490455&d=1525176288
cooltt said:
Ok, so your device will take UK Unbranded BTU firmware. You can get it from a few sources and even direct from Samsung servers with Samtool.
Forget all that flashing TWRP and non verify nonsense, if you can get into download mode you can flash firmware, obviously make sure the firmware downloaded is not corrupt etc.
I've used Odin V10 -13 to flash BTU and every version flashed it correctly. Sometimes you do get that "installing update" and then "erasing" but that's fine just leave the phone for a few minutes it should eventually reboot normally.
Click to expand...
Click to collapse
Just tried the latest BTU with Odin 3.13.1, same problem. Its reboots into the blue screen, applying system update to about 32% and then switches to "Erasing". After about 1min it reboots, shows "Installing System update" for a second and I end up with "No command" again. And from there on it just constantly reboots into the "No command" screen.
This seems like the same problem. I can not enter stock recovery to wipe though...
Things ive tried so far:
- Different firmware Versions (all oreo since downgrading is impossible)
- Formating with pit files
- Different Odin Versions
- Unplugging and replugging the battery
- Installing TWRP, wiping data and then installing stock recovery through TWRP
Did u try in Odin nand erase and repatition option? If not try it ( make sure u have pit file extracted or downloaded from the net)
Scorpionea said:
Did u try in Odin nand erase and repatition option? If not try it ( make sure u have pit file extracted or downloaded from the net)
Click to expand...
Click to collapse
Did a efs backup through TWRP just in case, then flashed the latest DBT firmware with nand erase -> still the same problem.
I can only guess that this was caused by using a backup from another phone back when Oreo came out, this probably messed something up really badly. Very weird, im kinda lost.
Killuminati91 said:
Just tried the latest BTU with Odin 3.13.1, same problem. Its reboots into the blue screen, applying system update to about 32% and then switches to "Erasing". After about 1min it reboots, shows "Installing System update" for a second and I end up with "No command" again. And from there on it just constantly reboots into the "No command" screen.
This seems like the same problem. I can not enter stock recovery to wipe though...
Things ive tried so far:
- Different firmware Versions (all oreo since downgrading is impossible)
- Formating with pit files
- Different Odin Versions
- Unplugging and replugging the battery
- Installing TWRP, wiping data and then installing stock recovery through TWRP
Click to expand...
Click to collapse
Ok, from the no command screen do the following.
Hold power until phone switches off, then press power+home+volume up. The phone should now boot into original recovery screen. Select "wipe/factory reset" and then reboot device. Job done.
cooltt said:
Ok, from the no command screen do the following.
Hold power until phone switches off, then press power+home+volume up. The phone should now boot into original recovery screen. Select "wipe/factory reset" and then reboot device. Job done.
Click to expand...
Click to collapse
Tried that, recovery is simply not working. If I hold vol - + power + home to restart and switch immediatly to vol + I boot into the usual blue screen with No command. I even tried unplugging the battery to shut off the phone and boot into recovery from there but that is not working either. Sorry should have stated that more clearly.
If I flash TWRP however, I can easily boot into TWRP with the recovery button combo.
Killuminati91 said:
Tried that, recovery is simply not working. If I hold vol - + power + home to restart and switch immediatly to vol + I boot into the usual blue screen with No command. I even tried unplugging the battery to shut off the phone and boot into recovery from there but that is not working either. Sorry should have stated that more clearly.
If I flash TWRP however, I can easily boot into TWRP with the recovery button combo.
Click to expand...
Click to collapse
Ok it's a tricky one so one more thing I would suggest is download and install Samsung smart switch on your PC, place the phone in download mode plug it into lap top and choose emergency software recovery in smart switch
Edit. I just remembered before that try this button combo from the no command screen volume up+volume down+power.
cooltt said:
Ok it's a tricky one so one more thing I would suggest is download and install Samsung smart switch on your PC, place the phone in download mode plug it into lap top and choose emergency software recovery in smart switch
Edit. I just remembered before that try this button combo from the no command screen volume up+volume down+power.
Click to expand...
Click to collapse
Hmmh. Searched a lot for the version that still supported emergency recovery. (which seems to be 4.0). If I go into download mode, start smartswitch and try to use emergency recovery there is nothing for me to select.
Volume up + down and power gives me the terminal like look which I attached in the first post with all those error messages.
Killuminati91 said:
Hmmh. Searched a lot for the version that still supported emergency recovery. (which seems to be 4.0). If I go into download mode, start smartswitch and try to use emergency recovery there is nothing for me to select.
Volume up + down and power gives me the terminal like look which I attached in the first post with all those error messages.
Click to expand...
Click to collapse
The EFS partition is corrupt or blank, it's the only logical explanation but the TWRP back up should solve that, without looking at it my self and running some commands i cant help your further.
cooltt said:
The EFS partition is corrupt or blank, it's the only logical explanation but the TWRP back up should solve that, without looking at it my self and running some commands i cant help your further.
Click to expand...
Click to collapse
TWRP backup was created after I ran into problems though. Ive checked some more things and it seems like the serial number that is displayed (in combination rom and or Z3X) is not the same SN that is printed on the back of the phone. Could this be related? And how would I go about changing it back to the one on the sticker? The IMEI is correct.
Had someone who was more into the whole thing contact me here but when I wanted to "donate" only half of what he was asking he refused to help me.
Killuminati91 said:
TWRP backup was created after I ran into problems though. Ive checked some more things and it seems like the serial number that is displayed (in combination rom and or Z3X) is not the same SN that is printed on the back of the phone. Could this be related? And how would I go about changing it back to the one on the sticker? The IMEI is correct.
Had someone who was more into the whole thing contact me here but when I wanted to "donate" only half of what he was asking he refused to help me.
Click to expand...
Click to collapse
Thats because he's a scammer. Never donate to get your phone fixed! Donate to Rom developers and things you like but never to get the phone fixed, they're usually lying.
The serial number should be the same ON the phone as displayed IN phone. Tell me the story about the phone, how did you get it? what region? where are you? what firmware was installed? Can you still flash a ROM with TWRP? Can you check OEM unlock?
---------- Post added at 04:53 PM ---------- Previous post was at 04:51 PM ----------
nmnmnmnmnmnmnmnmnm
Pretty sure he was just trying to remote repair for a price, which is not allowed on XDA. Would obviously donated on my own if he actually fixed it.
Bought the phone unlocked directly from a provider (simply - germany - dbt - g930f) back in 2016. Tripped kn0x after a few months, installed a few custom roms until Oreo came out.
This is where I messed up I think: I used a TWRP backup from someone else that he had shared here on XDA, which probably included his /efs too.
Since then I had constant connection problems, weak internet connection, dropped calls and so on.
Broke my screen and then decided to repair it myself. Bought a new frame, screen, battery, usb-port, earpiece and vibrator - managed to assemble all of that.
I can install all latest official firmwares (bootloader 3) through Odin. If I leave it at that I have no recovery and end up with the initially shown screen and "No command".
If i install TWRP from there and simply root with magisk or apply dm-verity-fix I can boot into the stock firmware with everything working.
I can also install ROMs. Just going completely vanilla is not possible anymore. OEM Unlock is checked, USB debugging works.
Edit: What is also astounding: If I flash version DBT-G930FXXS3ERHD-20180918145033 (oldest possible Oreo Version) I can enter recovery and do a factory reset and wipe cache.
If I do that however I am stuck at the Galaxy S7 Logo, not even bootlooping.
Killuminati91 said:
This is where I messed up I think: I used a TWRP backup from someone else that he had shared here on XDA, which probably included his /efs too.
Click to expand...
Click to collapse
awww.....come on man you should have said this at the start! Of course you can't use someone else's EFS data, it's unique to your handset. Custom Rom's patch some but not all EFS data that's why they work and in your case that's why Stock firmware isn't going too.
Anyway if this is the problem (and i suspect it is) there is only one way to fix it with Octopus box which can write all the important info back onto the EFS. Your IMEI, Serial, Mac address etc. Odin reads the info from the EFS prior to nand write start, if the phone serials don't match it will always fail at some point.
You can install a custom via twrp but it will not work correctly due to EFS data miss match. Octopus box is your answer.
cooltt said:
awww.....come on man you should have said this at the start! Of course you can't use someone else's EFS data, it's unique to your handset. Custom Rom's patch some but not all EFS data that's why they work and in your case that's why Stock firmware isn't going too.
Anyway if this is the problem (and i suspect it is) there is only one way to fix it with Octopus box which can write all the important info back onto the EFS. Your IMEI, Serial, Mac address etc. Odin reads the info from the EFS prior to nand write start, if the phone serials don't match it will always fail at some point.
You can install a custom via twrp but it will not work correctly due to EFS data miss match. Octopus box is your answer.
Click to expand...
Click to collapse
Dang it. Thank you! Off to find someone who can do this via remote access or in Berlin.
Same situation right now with my S7. Damn.
Hi everyone. Did you guys find any way to resolve this issue? i have exactly the same issue here.. but in my case i cannot use twrp cuz i never installed it before... the issue happened right after i tried to enter the recovery mode by pressing the buttons...
my wife's galaxy s7 touch screen was acting weird and i tried to get into the recovey mode..which is pretty muh easy to do... but once i tried the no command msg came up and now i have exatly the same case as the guy that opened this thread....also done everything hes done....any clue about this anyone?
id appreciate some help..
thanks in advance
Diego Boffa
Anyone?
I have exactly the same error with "fail to open recovery_cause(No such file or directory)#
My Tablet is now stuck with a blue "android dead" screen saying "No command".
My history to disaster:
- i've recovered a "broken" Samsung Tablet (sm-T585) with corrupted file system via
* Download Mode works -> TWRP install -> Mount option -> use ADB to recreate EFS partition -> re-flash stock image (android 8) with odin
- device works fine
- then i've noticed it can only be used with a certain cell provider (o2)
- then i've tried to flash an older version of the stock rom (android 7) due some problems in Android 8 (often some slow downs while operating)
- this doesn't work, the flash don't start
- therefore nothing should be happend, or?
- then i've can't get anymore in the stock recovery to wipe all data
...therefore the mess began:
* i can't flash TWRP anymore
* i can't flash stock recovery anymore
* i only can get into download mode
* i can only flash a certain rom type successfully (green PASS within odin), but with the final stuck with boot loop, with the mentioned blue screen
* other rom version can't flashed
I hopefully ask you guys here, if anyone can help me?
Any help would be very appreciated ...

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