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Is it fixable? Bricked S6 won't boot or accept ROM flashes.

Previously, I've talked about how I bricked my G920T by using an apk to try to root my phone.
Then I tried to do a factory reset with the stock recovery but it wouldn't even go into the stock recovery. So I flashed TWRP and wiped the whole phone including the system partition.
Then I tried to flash a stock 6.0.1 firmware to the phone but doing so did not improve the situation as my phone still won't boot. Even worse, when I power my phone, all I see is the blue LED indicator, no Samsung logo, nothing.
Then I tried to flash a custom ROM like XtreStoLite but that didn't fix anything either.
When I use TWRP or the stock recovery, the error "failed to mount /efs (invalid argument)" comes up on the log. I tried using the ADB method to fix it but my phone would not get recognized by ADB probably because USB debugging isn't on by default.
I cannot shut down the phone without having it charged to a power source then holding down PWR+DOWN VOLUME+HOME until the screen shuts off.
When I enter download mode, I don't see the warning screen, I enter the download mode directly.

It will warm you when you enter download. Or use TWRP and reboot into Download.Once in download flash the ROM using Odin. Get the latest one from SamFirm.
P.S. Next time root using CF Auto Root

yasteellutch said:
It will warm you when you enter download. Or use TWRP and reboot into Download.Once in download flash the ROM using Odin. Get the latest one from SamFirm.
P.S. Next time root using CF Auto Root
Click to expand...
Click to collapse
It doesn't warn me when I enter download mode, that's one of the problems.
I tried flashing the official ROM using ODIN, it still won't boot because of the efs error.

1) Download the latest SmartSwitch
2) Click on more -> Emergency software recovery and initialization
3) Go into Device initialization, enter your model name, search for it and proceed as advised by the assistant
That should fix everything, otherwise:
1) Download the latest official firmware for your model, the 4-File (or 3-File) Version
2) Use latest ODIN, check repartition in options
3) Select all the files and flash it

If EFS or DRK is corrupted, flashing roms, custom or not won`t help, it can be fixed via repair box maybe (Octoplus/Z3X)
Try to flash CF auto root for your model, if it still won`t boot, then find someone with a box to try to help you remotely or not.
But Smart Switch emergency initialization with phone sn would be the first thing I would try.

Orginator said:
1) Download the latest SmartSwitch
2) Click on more -> Emergency software recovery and initialization
3) Go into Device initialization, enter your model name, search for it and proceed as advised by the assistant
That should fix everything, otherwise:
1) Download the latest official firmware for your model, the 4-File (or 3-File) Version
2) Use latest ODIN, check repartition in options
3) Select all the files and flash it
Click to expand...
Click to collapse
Which mode should I be in when using SmartSwitch? No devices are shown when I have it plugged in during the bootup, and is so too in download mode but shows a not supported message.
brenner650 said:
If EFS or DRK is corrupted, flashing roms, custom or not won`t help, it can be fixed via repair box maybe (Octoplus/Z3X)
Try to flash CF auto root for your model, if it still won`t boot, then find someone with a box to try to help you remotely or not.
But Smart Switch emergency initialization with phone sn would be the first thing I would try.
Click to expand...
Click to collapse
How can someone with a box help me remotely?

zheyizhu said:
Which mode should I be in when using SmartSwitch? No devices are shown when I have it plugged in during the bootup, and is so too in download mode but shows a not supported message.
Click to expand...
Click to collapse
Download mode offcourse. Nevermind the not supported message.
Follow instructions from link below, I made it for such occasions:
http://forum.xda-developers.com/galaxy-s6/help/how-to-smart-switch-emergency-t3383448
zheyizhu said:
How can someone with a box help me remotely?
Click to expand...
Click to collapse
Well if you know someone who have a box, it doesn`t have to be remotely.
If not, it is possible to fix it remotely, with help of usb hub (FlexiHub or similar), tunneling (TeamViewer or similar) and box software (you connect phone to your computer, the other guy connects box to his computer, both of you are connected through a gateway to a wonderfull thing called internet, and everybody is happy ) .
Same as on site, just with few more things in between the phone, and the box.

brenner650 said:
Download mode offcourse. Nevermind the not supported message.
Follow instructions from link below, I made it for such occasions:
http://forum.xda-developers.com/galaxy-s6/help/how-to-smart-switch-emergency-t3383448
Well if you know someone who have a box, it doesn`t have to be remotely.
If not, it is possible to fix it remotely, with help of usb hub (FlexiHub or similar), tunneling (TeamViewer or similar) and box software (you connect phone to your computer, the other guy connects box to his computer, both of you are connected through a gateway to a wonderfull thing called internet, and everybody is happy ) .
Same as on site, just with few more things in between the phone, and the box.
Click to expand...
Click to collapse
The S/N sticker on the back of the phone is long gone, is there any other way I can find it besides from going into settings because I can't do that?
EDIT: I am able to borrow a friend's serial and got the firmware installed.
The Samsung boot logo is back now, however, the device still won't boot. The efs error is still there but the download mode warning sign came back.
EDIT #2: Okay, I flashed TWRP now and ADB is working once again. Can I utilize this to fix the efs error?

Custom Binary blocked by FRP lock & Odin/PC won't recognize the device

Hello all,
So I finally got the dreaded FRP lock error when trying to reboot my phone.
Things I've tried to do:
1. Install Smart Switch and enter my model number + S/N and I get an error "This model number cannot be initialized"
2. Install Samsung Kiss update the drivers etc
3. Download stock firmware and try flash through Odin "Device wont recognize on PC or Odin" (But with another phone it will, so USB is fine)
4. Went into the recovery menu, wiped device/cleared cache etc
So the problem is the device is not recognizing on my on Windows 10 + Windows 7 - If I can get the device to recognize i will be able to flash stock firmware and my issue will be resolved.
If anyone has a bypass, or has resolved their issue please let me know - because I have tried everything.

Galaxy S6 SM-G920I bricked

Hi all,
I've got a Galaxy S6 SM-G920I which will boot to : An error has occurred while updating the device software. Use the Emergency recovery function in the Smart Switch PC software.
I've installed the latest Samsung USB drivers to my PC.
I've installed smart switch and it says my device is " Unsupported Device " . I also updated smart switch to latest version and that made no difference.
I recently deleted 2 important video files by mistake.
A call to Samsung reveiled that there is no way to recovery deleted data from phones internal storage...
A bit of googling lead me to believe the data is still there, its just not visible. Here : https://howtorecover.me/data-recovery-internal-storage-android-phone-guide
So i'm following this guide and get stuck at the > su command. a bit more research reveals I need to root my device.
So I followed a guide on this forum to install latest version of twrp, odin, and magisk.
I reboot and I have root access to the phone.
I continue the guide and fail to proceed after the command > fdisk -l
So I install busybox, and grant it root access.
Command runs but has no output....
At this stage I decide to give up and initiate a system recovery from my phones settings.
Which lead to an endless boot cycle showing the Samsung logo.
More internet research lead me to believe downloading a stock firmware from sammobile might help.
So I downloaded G920IDVU4FRH2_G920ITEL4FRI1_TEL firmware and discovered the instructions on that webpage do not match the extracted content...
So I think that what I feed into odin was the wrong stuff and I've bricked my phone.
I can also access my phones download boot option, and thats all at the moment.
Comments and suggestions welcome

Found the solution here : https://www.reddit.com/r/GalaxyS8/comments/6nb51r/galaxy_s8_odin_flash_fail_softbrick/dk94krm/
Open Odin, place all the necessary files into their slots.
Go the the options tab, make sure "Auto Reboot" IS ticked.
Press "start", but as soon as you do, hold down Vol down+Bix+Power on your phone. Odin will fail and your phone will reboot into download mode again. Now press "Start" in Odin again, and your phone should flash without a problem. This might take a few attempts to get right, but I hope it helps.

At all flash new rom

SAMSUNG GALAXY S6 (SM-G920I) stuck at Logo, Error: dm-verity verification failed.

Hi Every One!!!
It looks like many other issues, but the problem is My phone stucks at Samsung logo and I am not able to connect to Odin ( installed latest Samsung USB Drivers - didn't worked, Neither connected to Samsung smart Switch). so cant flash anything....giving error at recovery screen: dm-verity verification failed.
Update from ADB, external storage is disabled.....wiped data/ cache, factory reset didn't worked.
Can go to "download mode" and to Android system Recovery but cant connect to pc.......
When its turned of, connect to pc, it starts charging,,, but when on downloading mode, connect to pc, pc does not make a sound like something has been connected to it...or even on removing no sound, nothing.
PLEASE HELP!!
DETAILS:
My Phone: Samsung Galaxy S6 (SM-G920I)
Software Version: Android 5.1.1
The phone gets stuck at the Samsung logo and has to be reset using power + volume down + volume up
- I then try wiping the cache partition (multiple times) – does not solve the problem
- I then try a factory reset/cache partition wipe (multiple times) – does not solve the problem.
My Android System Recovery screen shows at the bottom:
dm verity verification failed
AND
Odin Mode:
- Product Name: SM-G920I
• Current Binary: Custom
• System Status: Custom
• Reactivation Lock: OFF
• Secure Download: Enabled
• KNOX WARRANTY VOID: 1
• RP SWREV: B:3 K:2 S:2
I downloaded “SM-G920I_G920IDVU4FRC3_G920IZTO4FRC1_ZTO_7.0_(by_firmwarefile.com).zip” to flash from Odin, but MY phone is not able to connect to pc, nor with ODIN, NOR with ADB, Nor with Smart switch, nor as simple removable drive…… I think its USB debugging is not turned on as well as I have never connected this device to pc.
From recovery screen,
Apply update from ADB……..show its Disabled
Apply update from external storage…..show its Disabled
Apply update from cache……..deprecated
Reboot to bootloader……..does nothing, system starts to boot normally and stucks at Samsung logo
Took it to mobile shops, they returned saying that they are not able to connect it to pc..
Please advise, what options are available……….very grateful……thanks and regards.
P.S. My phone shows at the back SM-G920P……..while inside at Android system recovery its, “LMY47K.G920IDVU3DOJ6 and on Odin Mode is ; SM-G920I,,,,,,,,,which firmware should I use to flash. Thanks and regards

Imtiaz Shah said:
Hi Every One!!!
It looks like many other issues, but the problem is My phone stucks at Samsung logo and I am not able to connect to Odin ( installed latest Samsung USB Drivers - didn't worked, Neither connected to Samsung smart Switch). so cant flash anything....giving error at recovery screen: dm-verity verification failed.
Update from ADB, external storage is disabled.....wiped data/ cache, factory reset didn't worked.
Can go to "download mode" and to Android system Recovery but cant connect to pc.......
When its turned of, connect to pc, it starts charging,,, but when on downloading mode, connect to pc, pc does not make a sound like something has been connected to it...or even on removing no sound, nothing.
PLEASE HELP!!
DETAILS:
My Phone: Samsung Galaxy S6 (SM-G920I)
Software Version: Android 5.1.1
The phone gets stuck at the Samsung logo and has to be reset using power + volume down + volume up
- I then try wiping the cache partition (multiple times) – does not solve the problem
- I then try a factory reset/cache partition wipe (multiple times) – does not solve the problem.
My Android System Recovery screen shows at the bottom:
dm verity verification failed
AND
Odin Mode:
- Product Name: SM-G920I
• Current Binary: Custom
• System Status: Custom
• Reactivation Lock: OFF
• Secure Download: Enabled
• KNOX WARRANTY VOID: 1
• RP SWREV: B:3 K:2 S:2
I downloaded “SM-G920I_G920IDVU4FRC3_G920IZTO4FRC1_ZTO_7.0_(by_firmwarefile.com).zip” to flash from Odin, but MY phone is not able to connect to pc, nor with ODIN, NOR with ADB, Nor with Smart switch, nor as simple removable drive…… I think its USB debugging is not turned on as well as I have never connected this device to pc.
From recovery screen,
Apply update from ADB……..show its Disabled
Apply update from external storage…..show its Disabled
Apply update from cache……..deprecated
Reboot to bootloader……..does nothing, system starts to boot normally and stucks at Samsung logo
Took it to mobile shops, they returned saying that they are not able to connect it to pc..
Please advise, what options are available……….very grateful……thanks and regards.
P.S. My phone shows at the back SM-G920P……..while inside at Android system recovery its, “LMY47K.G920IDVU3DOJ6 and on Odin Mode is ; SM-G920I,,,,,,,,,which firmware should I use to flash. Thanks and regards
Click to expand...
Click to collapse
Seems you flashed an unsigned system image or similar to trigger dm-verity like that. Your best option would be to try to set the device in EDL (Qualcomm HS-USB 9008) mode and reflash from there (assuming you already know how to do so) there is a good amount of info on Google and XDA to guide you through. The S6 should have a programmer file to flash as your SBL to reflash the stock firmware
---------- Post added at 03:38 AM ---------- Previous post was at 03:36 AM ----------
If you need to create the rawprogram0 and patch0 files I have custom tools I can share to help you create that as well as your firmware to flash. You will need a programmer though and it can be a difficult process for a user who is beginner with it

@Imtiaz Shah
The 1st thing of all things an Android phone owner should do is turn USB Debugging on: then life becomes easier.
So by means of ADB you can manage Android kernel's dm-verity feature
To disable
Code:
adb devices
adb disable-verity
To enable
Code:
adb devices
adb enable-verity
Is working fine on userdebug builds.

jwoegerbauer said:
@Imtiaz Shah
The 1st thing of all things an Android phone owner should do is turn USB Debugging on: then life becomes easier.
So by means of ADB you can manage Android kernel's dm-verity feature
To disable
To enable
Is working fine on userdebug builds.
Click to expand...
Click to collapse
I think in his case he is on a production build which disables this feature. At least as far as I can see
And yes that's the first thing you should do I do agree

Yes Bro. I missed the trick . But this time I think I am really stuck as I was not wise enough to enable USB debugging in advance. I've been trying to connect the phone with multiple laptops, after installing Samsung USB drivers, but the Laptops are not even making a single sound that something has been connected. Nor showing unknown device, I mean just nothing. I am having a hard time to connect my phone with the laptop. even the guys sitiing at the mobile shop returned the phone after two days by saying that they are not able to connect the phone with the PC.
So, at the moment, on the Android System Recovery Screen, there is a error "dm-verity Verified Failed" and when I try "Apply update from ADB" system says "Disabled",,, "Apply update from external source" system says "Disabled",,,,,,"Apply update from cache",,system says,, "deprecated", when I try "Reboot to boot loader",,,nothing happens and phone starts normally and stuck at logo AND I am not able to connect my device with the phone (which seems to be the main problem). Is it something that my phone has gone into some kind of security lock ??? I am able to access the recovery mode as well as download load mode in the phone but nothing happens afterwards..

I have instaled QDLoader HS-USB Drivers and tried connecting my device through Qcom_EMCP_Multi-Port_Software but result invain....

TheExploitedOne said:
Seems you flashed an unsigned system image or similar to trigger dm-verity like that. Your best option would be to try to set the device in EDL (Qualcomm HS-USB 9008) mode and reflash from there (assuming you already know how to do so) there is a good amount of info on Google and XDA to guide you through. The S6 should have a programmer file to flash as your SBL to reflash the stock firmware
---------- Post added at 03:38 AM ---------- Previous post was at 03:36 AM ----------
If you need to create the rawprogram0 and patch0 files I have custom tools I can share to help you create that as well as your firmware to flash. You will need a programmer though and it can be a difficult process for a user who is beginner with it
Click to expand...
Click to collapse
Thanks a million Bro!!
I am a Noob and have no idea about " the rawprogram0 and patch0 files ". I am certainly looking for a soultion to solve my issue but have no idea how much I can bother you on this...... but in either I am really thankful for your sincere offer and really grateful to you. My Heartiest Regards ...

This includes links to the tools you will need and a link to create the proper files. I don't take any credit for these what so ever
The S6 download the lastest firmware and ensure you have the GPT file (it will have a specific name) to use because it will be needed

I'm always available to help

stuck on download mode

Revision 1
S7 edge(G935F, exynos model)
Android 8.0.0(Oreo)
rooted = yes, using odin and cf-autoroot file
dev options = turned off
USB debugging = off
OEM unlock = locked
carrier = when bought it isn`t tied to any carriers, now it don`t have any SIM card
SD card = Inside, but broken
What happened?
I try to root the phone. This is the first I`ve root a phone. I follow the instructions exactly and it worked. Then the OS notifies me that I have to restart my phone because of security issues. I restarted it, but it won`t boot. There`s a message in the top corner of the screen that says "custom binaries blocked by FRP", I looked it up and saw how to fix it, found it from imyfone.com (
[2023] Fix “Custom Binary Blocked by FRP Lock” - 100% Work
Stuck on 'custom binary blocked by frp lock' error on your Android device? Find the latest & easiest way here to fix it quickly!
www.imyfone.com
), follow it, when I need to input my carrier and country, imyfone don`t list my country (Indonesia) and don`t have the options to select no carrier so I can`t proceed because it already warns me that if I got the info wrong, I will brick my phone. Then I try to brainstorm an idea by myself and found if I redownloads the rooted tar.md5 to my phone, it will boot again. I boot it to the download mode, prepares Odin, ADB, an USB driver, connect it to this computer and start downloading. Odin says it failed to download but the phone is still stuck on the download mode, and I disconnected the USB several times (What do you need USB for if the download has failed?)
What have I tried? (Not in chronological order)
- ReiBoot, to get out of the download mode and fix the phone
- Factory Reset
- Restarting from the original recovery mode
- redownloads the tar.md5 file to my phone
What I think is the solution?
1. Give up and admit that the phone is broken (not recommended), or
2. Wait until the battery dies and try to boot it again

additional info
[If there`s a need for revision(s) like more infos, just ask in this discussion]
the rooting guide is from tenorshare.com (https://www.tenorshare.com/android-root/how-to-root-samsung-galaxy-s7-or-s7-)