SM-G920W8 Will Not Root - Galaxy S6 Q&A, Help & Troubleshooting

I am having a problem with rooting my S6. Every time I try I get an error when it gets to the step of checking the RAMdisk or something like that and it says recovery failed or something, it goes by very quickly. Then my phone just reboots normally except now I cannot update my phone because I have changed the OS even though it did not root successfully.

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[Q] I think my XOOM is possessed, HELP!

I want to start out stating that i am very familiar with android's but have never experienced anything like this.
The first thing I tried was to oem unlock it from fastboot, which it claimed to do however i am skeptical as nothing else seems to stick, attempted to install cwm and TWRP neither with any success, even though it says the action was performed successfully.
The strangest thing is that i deleted all the apps on the device from settings/app, but when i rebooted my device they all came back!
All i wanted to do was do a factory reset, which also claims to finish successfully but after rebooting from recovery mode, i am back where i started.
App Updates also do not work as every time the tablet reboots, the apps have to be re-updated.
Its like the tablet is stuck in a read only state and when it reboots all changes are lost.
Like i said, this thing is acting weird and i have no idea where to go from here. Any help would be greatly appreciated!
[Update: Tried RSDLite, same results, Result is PASS however after system reboot everything is the same.]
Another update, tried downloading HWI69 which is the stock rom, tried to fastboot each image but nothing sticks even though it seems to say it writes it to the system. I'm starting to think the NAND memory is locked up and cannot be written to anymore if that's even a possibility.
BUMP

Problem with ATT Note 2 (fast help)

I have a problem with a note 2, what goes on is everytime after I get a software update, at the end of it says it could not complete. Before this I have tried rooting my phone but failed cause when I root check it says not rooted, but when I go into odin mode on the phone it says current binary:custom and system status:custom. I would like to fix all of this and could even consider flashing to standard rom. Fast Help would be really appreciated

[Q] Trouble flashing Stock & Custom ROM's

So it started out that CM 12 kept shutting down on me, the phone would occasionally just power off. I tried restoring some of my TWRP backups but they seemed to be corrupted.
So I decided to try RSD and reflash the stock firmware and go back to 4.4. I let it flash and then when I booted up I kept getting a message saying that the phone was going into cool down mode, but the phone never actually got hot. So I decided to try and reflash the stock 4.4 firmware again in RSD. This time I watched the phone screen as it went through and just after the system image (#7 of 17) I would get a message in "RED" letters that reads "sp space is not enough". It would continue to flash the rest of the images and then reboot. And it would have the same problem with saying the phone is going into cool down mode and sometimes it would shut off, but the phone never gets hot.
I thought maybe I had a bad download / firmware image so I tried several 4.4 images including one directly from Motorola but I get the same message every time I flash the stock 4.4 ROM.
*While it is plugged into the computer the phone stays on, but once I disconnect from the computer it shuts down again.
So I thought I would try flashing TWRP and CM 11 and then CM12, but the phone will boot up and then shortly after boot up it will shut down.
I have spent hours looking for a solution online and I do find that there have been multiple reports of this same problem along with photos of the phone screen message, but I have not found an explanation or a solution.
Does anyone have any idea what the problem is or how to fix it?
morr22066 said:
So it started out that CM 12 kept shutting down on me, the phone would occasionally just power off. I tried restoring some of my TWRP backups but they seemed to be corrupted.
So I decided to try RSD and reflash the stock firmware and go back to 4.4. I let it flash and then when I booted up I kept getting a message saying that the phone was going into cool down mode, but the phone never actually got hot. So I decided to try and reflash the stock 4.4 firmware again in RSD. This time I watched the phone screen as it went through and just after the system image (#7 of 17) I would get a message in "RED" letters that reads "sp space is not enough". It would continue to flash the rest of the images and then reboot. And it would have the same problem with saying the phone is going into cool down mode and sometimes it would shut off, but the phone never gets hot.
I thought maybe I had a bad download / firmware image so I tried several 4.4 images including one directly from Motorola but I get the same message every time I flash the stock 4.4 ROM.
*While it is plugged into the computer the phone stays on, but once I disconnect from the computer it shuts down again.
So I thought I would try flashing TWRP and CM 11 and then CM12, but the phone will boot up and then shortly after boot up it will shut down.
I have spent hours looking for a solution online and I do find that there have been multiple reports of this same problem along with photos of the phone screen message, but I have not found an explanation or a solution.
Does anyone have any idea what the problem is or how to fix it?
Click to expand...
Click to collapse
I had tried everything I could think of and it appeared that there was a partition problem. The phone continued to shut down and would only stay on while connected to the PC. If it were a PC I would reformat and re-partition the drive but I did not want to risk a permanent brick by messing with it.
So, as a last ditch effort to try and get my phone functioning again I let it download and install system updates. The phone is now working again, it has not shut down at all and there have been no warning messages about cool down mode.
BUT, I am now on "4.4.4, SU-5-24, build 23.3.24 dated 10-27-14. Since my boot loader is unlocked I flashed TWRP but it would not not accept Super SU zip so I am no longer rooted.
I finished reading up on it in the forums and realize I am pretty much screwed as far as root goes. But at this point I don't even care anymore. I just need to get the phone functioning correctly.
*So, I am still having the problem with flashing stock and getting the "red" letter message after system image boots saying "sp space not enough". So long as it is hooked up to the computer it stays on and if it is downloading or installing an update it stays on and I never get a warning about cool down mode and it does not shut off, but once I disconnect from the computer it starts all over again. The phone boots up but at random intervals it still either gets a pop up message saying that it has gone into "cool down mode" or it shuts off. It is not doing it as often as before, but it is still doing it. Does anyone have any suggestions on whats causing it or how to fix it? It sounds like a software / firmware issue but I am not sure how to fix it.
*Update. The phone is still not functioning correctly. At times it will appear to work fine for hours with frequent to heavy use at times then suddenly it will start acting up, the phone will shut down randomly and when it reboots some of my settings have changed. The temperature is usually pretty low but once in a while after a shut down I will check the temp when I'm able to reboot it and it will be high. When it shuts down like that I usually have trouble getting it to boot up again unless I plug in the factory cable, either in the PC or just the wall charge then it seems to boot up fine and I can even reboot it but once it shuts itself down it doesn't want to start again unless I use the factory cable.
It really does sound like a software / firmware / partition problem but after multiple attempts to flash the firmware with RSD I continue to get the same error message at the end of the system flash and the phone continues to have problems. Does anyone have any suggestions?
Got me an xt1080 which I'm trying to restore to stock, and in both House of Motor and RSDlite 6.2.4 at some point during the system partition flash 'so space is not enough' as well. The phone is in perpetual bootloop, unless I use a 'Factory/power' cord and starting up in fastboot (eventually). Tried both 1FF and CFC fxz files, no luck.

Software Update Failed Message After Root

I was following this guide https://forum.xda-developers.com/ve...-to-notes-root-install-xposed-unroot-t3411039 on rooting my galaxy s7, I've never done any of this before so I was expecting to mess up.
I did everything it said everything seemed to work fine, but after odin said it was successful, the phone rebooted and continued to reboot over and over again not starting up. I put it back in download mode and tried to flash back to stock and odin gives me a failed message. Now my phone says "Software Update Failed"
newbie at this, pls help

Bricked my G930W8

So i've had a rough couple of days with my S7. It all started when I used fdisk on /dev/block/sda thinking it was my usb. The phone froze and so it rebooted it, i would bring me directly to the download screen where i was able to install twrp.
Then I had problems with the /efs/ folder mounting, and like a noodle, i wiped it without a backup. So once i booted the phone. I had no service provider. I spent all day trying to figure that out.
Next I tried to install my stock firmware which always worked in the past. At this point i kept getting "dm-verifty" errors. TWRP bypassed it so i tried to flash it again, only to notice FRP lock was turned on on it's own. So let me sum it up.
I can't boot with stock firmware, i tried multiple all leading to "dm-verity error" "No DRK"
I can't install TWRP because FRP is ON.
Even if i figure this out, i have to deal with my imei and efs problems after. I read about Combination but Odin seems to refuse it.
I haven't even had the phone for a month so I may be able to return it but i doubt it because my void is 1 (0x500), which looks bad so.. :laugh:
If anyone can help me i would greatly appreciate it, thanks in advance.

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