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Failed to validate system image & stuck in fastboot

Hello, back in december I was trying to load up an app on my phone but in a video the guy said to download chainfire so I did and installed the driver and my phone got stuck in the warning unlocked bootloader screen and I really can't remember what I did but I did something with downloading the system restore image but it wouldn't work so I changed up the files and now my phone is stuck in fastboot and no longer is usable so I just threw it in my drawer and never used it again up until now here I am asking for help on how to resolve this issue. I'm no android techie so I really don't know much about anything other than rooting phones. My phone is a Moto G XT1031. Also I can't charge my phone because when I leave it, the phone just keeps rebooting and it really doesn't charge much.
UPDATE:
I managed to unlock the bootloader but now when I power it up, the device is stuck on the motorola screen.

If you can get into fastboot mode, try flashing a stock ROM for your phone.

audit13 said:
If you can get into fastboot mode, try flashing a stock ROM for your phone.
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Thank bro it worked for me thanks a lot

How to unbrick stuck in download mode?

Hi,
I flashed a MM rom on a Nougat h830, it stuck at 10% and now my phone is stuck in download mode showing Firmware Update do no unplug, how do I unbrick it, where can I find the proper TOT files?
thanks
Edit: I used Uppercut loader and it worked.

help me
good night i got the same problem i try to downgrade to 6.0 and i guess, i try with a different variant the version i have is h830 of t mobile and is stuck in download mode when i try to flash it, it send error so is the only threat that i read have the same problem, if i pull the battery it turn on and entry in download mode, i tryout anything even the uppercut but nothing help me, some body told me the error might be the boot loader i don´t know but i want to fix.... HELP OUT DUDE

jafeth9 said:
good night i got the same problem i try to downgrade to 6.0 and i guess, i try with a different variant the version i have is h830 of t mobile and is stuck in download mode when i try to flash it, it send error so is the only threat that i read have the same problem, if i pull the battery it turn on and entry in download mode, i tryout anything even the uppercut but nothing help me, some body told me the error might be the boot loader i don´t know but i want to fix.... HELP OUT DUDE
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Click to collapse
The attempt to flash 6.0 didn't work because of the anti rollback version in the roms for this phone. the furthest you can go back at the moment is to a 20A rom which stays in ARB (Anti-RollBack) 01. To get your phone functioning again, flash this rom using the uppercut method - https://forum.xda-developers.com/tm...ock-h830-20a-rom-flashable-zips-imgs-t3511294.
If you are trying to gain root, you will have to use the "recowvery" against that firmware.

da_reeseboy said:
The attempt to flash 6.0 didn't work because of the anti rollback version in the roms for this phone. the furthest you can go back at the moment is to a 20A rom which stays in ARB (Anti-RollBack) 01. To get your phone functioning again, flash this rom using the uppercut method - https://forum.xda-developers.com/tm...ock-h830-20a-rom-flashable-zips-imgs-t3511294.
If you are trying to gain root, you will have to use the "recowvery" against that firmware.
Click to expand...
Click to collapse
I got similar error when trying to downgrade to 10J . Phone got stuck in Download mode. Now , I could flash 20a with UpperCut; but upon rebooting phone got stuck at secure start-up , Settings keeps stopping . Any idea ? Btw, bootloader is already unlocked

abced123 said:
I got similar error when trying to downgrade to 10J . Phone got stuck in Download mode. Now , I could flash 20a with UpperCut; but upon rebooting phone got stuck at secure start-up , Settings keeps stopping . Any idea ? Btw, bootloader is already unlocked
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Click to collapse
I have this same issue. Can anyone help?
I can get into fastboot but I can't boot the OS normally. As soon as it boots up Settings keeps stopping so I can't get into ADB. I can't seem to boot into recovery with any key combo known to man.
Help? Bueller? Anybody?

G955FD Softbricked. OEM Unlock is Disabled.

Help Help Help :
Can I get some help? I bricked my phone because I was trying to install twrp. It flashed but I got TWRP cant install.Because. OEM locked.
It flashed. Great. But now IT STILL DOESNT BOOT. I'm stuck at NO COMMAND, it keeps restarting after 20-30 seconds of showing no command. and it's looping all over.*
i flashed stock firmware.It is flashed.Then reboot.Then install system update.Then Erasing.Then rebooting.Then NO COMMAND.Then reboot itselve recovery mode.Then i wiped factoory and cache.Then press rwboot to system.Then Samsung Galaxy S8 Plus.Then install system update.Erasing.No Command. etc. Keeps rebooting. its on NO command screen. It just restarts. Doesnt boot. I want to enable OEM Unlock. I installed combination binary. But not appear in Developer Mode.
i flash atock with Kies emergency.I flash different stock firmware from updato.com. But nothing happend.

I'm a little confused.
What state is your phone currently in, i.e. can you get into download mode, turn off... what?

JeffDC said:
I'm a little confused.
What state is your phone currently in, i.e. can you get into download mode, turn off... what?
Click to expand...
Click to collapse
KIES says that. (THR) Stock. i downloaded it and flashed with Odin. Then reboot. Then system install update. Then Erasing. Then reboot and No Command! 30 seconds keeps rebooting itself 30 seconds interval Random.
I did factory format, cache clear. then the same problem. i want to install twrp recovery with oden. It says Oem Lock. Not allowed. But i flashed Combinary file. I can get into system and i to developer mode but dosnt seem OEM UNLOCK that ll do enable it.

Ok mate, but if you press Vol- + Bixby + power for couple of seconds, can you access to download mode? If you can, I think you'll have to install the firmware all over again.

Try flashing using latest firmware from sammobile. Use Odin to flash all the files contained in firmware download. Make sure you get latest firmware for your carrier. Google how to flash using Odin. Hope this gets you in the right direction. Good luck finding what u need, do copious amounts of research before attempting any rooting of devices and if all steps aren't clear as day to you then do not attempt it unless you don't mind buying multiple expensive phones to tinker with.

Did OP find a fix to this problem?
I am experiencing a similar issue. Picked my phone up to find had randomly gone into a boot loop. Tried soft reset, cache wipe, factory reset - all successful but the phone would still reboot and be stuck on device model screen. Next I decided to flash the device with stock firmware. The flash passed in Odin, the phone then rebooted, loaded to device model screen, then a screen appeared saying "installing updates" which would make it to 25% then crash. After this the phone keeps booting, shows a screen with a dead android icon and says "no command" or "error". I have tried to flash the device using Oreo and Nougat firmware but have failed every time (although the flash did pass in Odin)
Any help would be greatly appreciated as I would rather not buy a new phone due to a random hardware fault which is out of my control.

southsideswaggar said:
Try flashing using latest firmware from sammobile. Use Odin to flash all the files contained in firmware download. Make sure you get latest firmware for your carrier. Google how to flash using Odin. Hope this gets you in the right direction. Good luck finding what u need, do copious amounts of research before attempting any rooting of devices and if all steps aren't clear as day to you then do not attempt it unless you don't mind buying multiple expensive phones to tinker with.
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Click to collapse
This is perfect if you have soft bricked your phone!

follow this video maybe it help you
https://forum.xda-developers.com/ga...g-aqg5-fix-t3636857/post73032395#post73032395
https://www.youtube.com/watch?v=VTi3uBkpJic&t=155s

SM-G930F reboots no Recovery possible

I got an S7 that reboots a feew seconds right after it shows the very first screen:Samsung Galaxy S7 powered by Android.
I can only acces Download modus and were able to sucessfully flash the recent firmeware via odin but it did not fix the phone.

Huzalio said:
I got an S7 that reboots a feew seconds right after it shows the very first screen:Samsung Galaxy S7 powered by Android.
I can only acces Download modus and were able to sucessfully flash the recent firmeware via odin but it did not fix the phone.
Click to expand...
Click to collapse
You MUST flash the correct firmware for device and region.
1. Uncheck "auto reboot" in Odin
2. Flash firmware again
3. Disconnect phone Do Not Power On!
4. Wait 2 minutes
5. Boot into recovery volume up+home+power
6. Wipe cache, factory reset, then reboot device.

cooltt said:
You MUST flash the correct firmware for device and region.
1. Uncheck "auto reboot" in Odin
2. Flash firmware again
3. Disconnect phone Do Not Power On!
4. Wait 2 minutes
5. Boot into recovery volume up+home+power
6. Wipe cach, factory rest, reboot device.
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Click to collapse
Tried that no luck. Wasnt able to boot in recocery from download modus. Tried to reset via power+vol down and immidetly switching to power+home+power up phone wasnt booting. Started booting as soon as i released the keys

Huzalio said:
Tried that no luck. Wasnt able to boot in recocery from download modus. Tried to reset via power+vol down and immidetly switching to power+home+power up phone wasnt booting. Started booting as soon as i released the keys
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Click to collapse
Mate keep trying you have to be really quick when it goes off to quickly press volume up

cooltt said:
Mate keep trying you have to be really quick when it goes off to quickly press volume up
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Okay just to be shure should i force the phone to restard after the 2 minutes or should it shut off by itself?

Huzalio said:
Okay just to be shure should i force the phone to restard after the 2 minutes or should it shut off by itself?
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Click to collapse
If it doesn't shut off after you flash firmware do a force restart by holding volume down+home+power. As soon as the phone goes off and before the galaxy splash screen appears you press volume up+home+power. If the splash screen appears before you do this then you are too slow. Repeat the power off process and try again

cooltt said:
If it doesn't shut off after you flash firmware do a force restart by holding volume down+home+power. As soon as the phone goes off and before the galaxy splash screen appears you press volume up+home+power. If the splash screen appears before you do this then you are too slow. Repeat the power off process and try again
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Yeah did exactly that switched to the combo before it showed anything no succes.

Huzalio said:
Yeah did exactly that switched to the combo before it showed anything no succes.
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Not sure what's wrong with it then

Huzalio said:
Yeah did exactly that switched to the combo before it showed anything no succes.
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you need to hold the buttons for 7 seconds .. you can also boot to recovery without flashing new firmware ... can you confirm that the volume up button still works ?

Ulf3000 said:
you need to hold the buttons for 7 seconds .. you can also boot to recovery without flashing new firmware ... can you confirm that the volume up button still works ?
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able to confirm to enter download modus

Huzalio said:
able to confirm to enter download modus
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Click to collapse
Ok the only reason it will not boot after a successful firmware flash with Odin is if the EFS partition is corrupt or missing.
You need to tell us exactly what you've done with the phone before this happened.
What country are you in?
What firmware did you have on your phone originally?
Where have you got the firmware files from?
Does Odin says "success" when flashed and "passed"?
Does the phone reboot after Odin flash?
Have you ever flashed a custom Rom to the phone?
Have you in any way modified the bootloader?

cooltt said:
Ok the only reason it will not boot after a successful firmware flash with Odin is if the EFS partition is corrupt or missing.
You need to tell us exactly what you've done with the phone before this happened.
What country are you in?
What firmware did you have on your phone originally?
Where have you got the firmware files from?
Does Odin says "success" when flashed and "passed"?
Does the phone reboot after Odin flash?
Have you ever flashed a custom Rom to the phone?
Have you in any way modified the bootloader?
Click to expand...
Click to collapse
Okay. I got the phone like this it started to happen slowly sometimes 10 minutes reboots then working fine.
I have the latest german dbt firmeware from samfile.
If i check auto reboot it reboots after the flash.
It says succes yes.
I have never flashed a custom rom or bootloader to it it has still the frp lock on.

Huzalio said:
Okay. I got the phone like this it started to happen slowly sometimes 10 minutes reboots then working fine.
I have the latest german dbt firmeware from samfile.
If i check auto reboot it reboots after the flash.
It says succes yes.
I have never flashed a custom rom or bootloader to it it has still the frp lock on.
Click to expand...
Click to collapse
This is your problem. Even when the phone boots on your going to have a major problem getting past this.
Look for a guide on how to bypass FRP Lock on Oreo, it can be a tedious process of installing TWRP and flashing combination firmware. Never ever ever ever flash anything with FRP lock on it causes so many problems and there's lots of threads about it here.

cooltt said:
This is your problem. Even when the phone boots on your going to have a major problem getting past this.
Look for a guide on how to bypass FRP Lock on Oreo, it can be a tedious process of installing TWRP and flashing combination firmware. Never ever ever ever flash anything with FRP lock on it causes so many problems and there's lots of threads about it here.
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Click to collapse
Okay i see.
Do you somehow have a good tutorial?

Huzalio said:
Okay i see.
Do you somehow have a good tutorial?
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Click to collapse
i had the frp lock too!! ,
https://forum.xda-developers.com/galaxy-s7/help/frp-lock-please-help-t3925674
for me it helped only flashing the AP and nothing else .. but you are already beyond that point becasue you flashed the bootloader BL i think ,
once the recovery and system partition are stock you should be able to boot (frp lock blocks modified recovery twrp or system , you must enable oem unlock in the developer options or it will frp lock for customizations you probably disabled it without knowing what it is(like me) ) ..
but ive red some other stories here , and they all boiled down to NOT flash the BL becasue it messes up the flashing for the otehr partitions ...
TRY FLASHING without BL !
i hope its not hardbricked or needs tons of tinkering
try to flash this AP : it worked for me , maybe it works for you ! (lets pray) (its from german vodaphone but it shouldnt matter)
https://updato.com/firmware-archive-select-model?record=92A63C2C07D011E99F15FA163EE8F90B

Ulf3000 said:
i had the frp lock too!! ,
https://forum.xda-developers.com/galaxy-s7/help/frp-lock-please-help-t3925674
for me it helped only flashing the AP and nothing else .. but you are already beyond that point becasue you flashed the bootloader BL i think ,
once the recovery and system partition are stock you should be able to boot (frp lock blocks modified recovery twrp or system , you must enable oem unlock in the developer options or it will frp lock for customizations you probably disabled it without knowing what it is(like me) ) ..
but ive red some other stories here , and they all boiled down to NOT flash the BL becasue it messes up the flashing for the otehr partitions ...
TRY FLASHING without BL !
i hope its not hardbricked or needs tons of tinkering
try to flash this AP : it worked for me , maybe it works for you ! (lets pray) (its from german vodaphone but it shouldnt matter)
https://updato.com/firmware-archive-select-model?record=92A63C2C07D011E99F15FA163EE8F90B
Click to expand...
Click to collapse
sadly no succes :/

Huzalio said:
sadly no succes :/
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Click to collapse
I think it's obvious you don't know what your doing, no offence. Everything that's been suggested should work with no problems. You are better off taking it to a Samsung centre to fix it. I doubt anyone will be able to help you here.

unbricking with the factory binary
This method is not for the faint of heart; it involves downloading 1) the factory binary for your phone, and 2) the correct firmware for your phone (which you can find at sammobile). I don't know if it will fix your particular problem but if everything else has failed, it's worth a try. You will basically be taking your phone back to its state when it was first set up at Samsung factory, before the firmware for your region was installed. I used this to get past a drk imei error, it's worth taking a look. Anyone else who knows more than me, please weigh in on what you think about it.
https://forum.xda-developers.com/s7-edge/how-to/guide-how-to-fix-check-drk-imei-issues-t3379516

S10e Literally stuck in bootloops after 2020 Update

So i updated my phone automatically yesterday from the latest update, after it was done, i haven't been able to access my phone in anyway, it keeps on looping samsung logo and a window that says "This phone's bootloader is unlocked´and its software integrity can't be verified" and so on, ive tried to enter either Download mode and recovery mode, but none of the methods seems to have an affect on the phone at all, please help, thanks

Hmm if u have PC download Smart Switch and do Emergency Firmware recovery. That should fix it totally.

FakerS3 said:
Hmm if u have PC download Smart Switch and do Emergency Firmware recovery. That should fix it totally.
Click to expand...
Click to collapse
- The phone does not show up on the pc either

Was your phone rooted? That could explain it.

riggerman0421 said:
Was your phone rooted? That could explain it.
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Click to collapse
Yes

thorius95 said:
Yes
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Click to collapse
Same issue here. s10e stuck in boot loop (between samsung logo and warning about the bootloader being unlocked) after yesterday's update.
So far I had no success putting the phone into recovery or download mode.
The phone was rooted, then flashed with custom ROM, then flashed again with stock firmware. I kept the bootloader unlocked because I read it was risky to re-lock the bootloader.
So, is it now hopelessly bricked?

chibuche said:
Same issue here. s10e stuck in boot loop (between samsung logo and warning about the bootloader being unlocked) after yesterday's update.
So far I had no success putting the phone into recovery or download mode.
The phone was rooted, then flashed with custom ROM, then flashed again with stock firmware. I kept the bootloader unlocked because I read it was risky to re-lock the bootloader.
So, is it now hopelessly bricked?
Click to expand...
Click to collapse
Thats a good question, far as i know, my phone is unable to get any form of connection to the pc, not able to start up in recovery or download mode either. What i know for sure, there is a way out, we just have to find the way

Never attempt to update if you have rooted and made any changes to the system, deleted or added system apps, modified kernel, changed boot logo,etc.

thorius95 said:
Thats a good question, far as i know, my phone is unable to get any form of connection to the pc, not able to start up in recovery or download mode either. What i know for sure, there is a way out, we just have to find the way
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Click to collapse
So, here's how I put the phone in download mode.
I left the battery to drain completely, then without pressing the power button, I pressed the volume down and Bixby button; and only then I plugged the cable. Without pressing the power button, the phone started straight into Download mode.
Now Odin sees the phone, I'm about to flash it with the stock firmware and see what happens.

thorius95 said:
Thats a good question, far as i know, my phone is unable to get any form of connection to the pc, not able to start up in recovery or download mode either. What i know for sure, there is a way out, we just have to find the way
Click to expand...
Click to collapse
Maybe this thread helps: https://forum.xda-developers.com/galaxy-s10/help/galaxy-s10-bootloop-updte-to-android-10-t4023201
It's probably Samsung's vaultkeeper that caused the bootloop.

thorius95 said:
Thats a good question, far as i know, my phone is unable to get any form of connection to the pc, not able to start up in recovery or download mode either. What i know for sure, there is a way out, we just have to find the way
Click to expand...
Click to collapse
I just wanted to give an update of how I rescued my phone and kept all the information on the phone memory intact (this was one of the challenges, as I had some photos on it).
I put it in download mode by draining the battery, then tried to flash the updated firmware. It didn't work, leading once again to boot loop and all I could do was boot to the stock Android recovery - not helpful.
So I got it to download mode again and flashed the stock firmware it originally came with (prior to the update). In Odin, I put HOME_CSC in the CSC field, to keep the phone memory from being erased. This solved it.
Hope this info can help someone having the same issue.