Stuck at unlocked bootloader warning screen (Samsung m21) - Samsung Galaxy M21 Questions & Answers

My phone suddenly stopped working and after a reboot i got stuck at the unlocked bootloader screen . It says to press the power button to boot but nothing happens. So I flashed stock firmware using odin v3 but the same issue. I tried fixing the partitions in twrp recovery but it gives me an error saying "Failed to mount metadata - invalid argument".
So lastly I used Odin PIT flash with rewrite partition but it still stuck at warning screen I only able to access Recovery mode and download mode .
Does anyone have a solution ? Please help

rajhridoy said:
My phone suddenly stopped working and after a reboot i got stuck at the unlocked bootloader screen . It says to press the power button to boot but nothing happens. So I flashed stock firmware using odin v3 but the same issue. I tried fixing the partitions in twrp recovery but it gives me an error saying "Failed to mount metadata - invalid argument".
So lastly I used Odin PIT flash with rewrite partition but it still stuck at warning screen I only able to access Recovery mode and download mode .
Does anyone have a solution ? Please help
Click to expand...
Click to collapse
Device exact model? some details might help the Devs find the solution. Is Custom ROM installed etc.?

Related

[Q] Unbrick phone?

Hello:
My Galaxy Mini is bricked by unlock method. It work with Cyanogen Mod 7, but haven't IMEI and don't recognizes any Sim card. When phone is 2 minuts active it reboot.
Exists now any method for unbrick phone in this status?.
Thanks in advance!!.
can you see a backup folder in your sdcard
reply
Thanks for your reply...
No, I haven't any backup folder in sdcard.
Thanks!!.
try to flash stock from through Odin which is your carrier specific
I have flashed stock of Vodafone (my carrier) with Odin and when reboot, hangs in the first screen. Rom not work.
Can I try another thing?.
Thanks!!.
Fossy_01 said:
I have flashed stock of Vodafone (my carrier) with Odin and when reboot, hangs in the first screen. Rom not work.
Can I try another thing?.
Thanks!!.
Click to expand...
Click to collapse
remove the battery when it hangs on boot splash, place it back.. boot to stock recovery by pressing home+powerbutton.. wipe data /factory reset, reboot system.. it should boot to the homescreen..
I have problem with bricked Galaxy Mini that stopped working by itself. It just got very hot in pocket and now it wont pass boot animation just loops into reboot again and again.
When i get into recovery with yellow letters it says:
-- Appling Mulici-CSC --
Can't access to '/system/H3G/system'
After i try wipe data i get following message:
-- Wiping data...
Formatting /data...
E:format_volume: rfs for at faild on /dev/stl13
Formatting /cache...
Data wipe complete.
When i reboot after this, everything is the same, phone wont boot after animation and goes into loop.
KIES and ODIN do not recognize the phone although w7 does.
Is there a way to unbrick?
---------- Post added at 11:24 PM ---------- Previous post was at 10:29 PM ----------
here is update:
Managed to get ODIN to see it, and flashed CMW and CM7 on it. Difference is that it now hangs on 'android' logo (boot animation) and does not reboot but still wont boot.
CMW doesnt report any errors like original recovery did. Also, it did instalation of cm7 without any reported error. Of course, did data wipe again...
What could be the problem?
Thanks in advance...
Thanks for your reply kitrax59.
I can't enter to recovery mode..., when I try it, phone still some seconds in splash screen, reboot one time and hangs again in splash...
Any other method for enter to recovery?.
Thanks!!.
Fossy_01 said:
Thanks for your reply kitrax59.
I can't enter to recovery mode..., when I try it, phone still some seconds in splash screen, reboot one time and hangs again in splash...
Any other method for enter to recovery?.
Thanks!!.
Click to expand...
Click to collapse
no other way.. just make sure you press the home first then the power button, and once you see the first samsung splash screen, release both keys.. holding it down too long will make it boot normally and gets stuck again at boot animation..

Help, Drk error from 6.0.1 update but FRP lock is off

Mt g920t was on rooted firmware 5.1.1 and i decided to unroot it to play pokemon go ( funny i know), i flashed it with stock firmware 5.1.1 but after the flash the phone was stuck on samsung logo and so i decided to flash it again to 6.0.1 . After the flash the phone restarted and went into recovery mode and on the bottom of recovery mode it says dm-verity verification failed , need to check DRK first.
I have wiped cache and also done factory from recovery but still nothing. when i go in download mode it says my FRP lock is off.
Everytime i turn on the phone or plug in the charger the phones goes into recovery mode.
Any help will be appreciated.

lg G4 H811 bricked: Unable to boot in download mode

Hi all,
I have put myself in horrible situation look like phone is bricked . I can not start my phone in recovery or download mode even.
here are the series of step I had performed:
1)Unlock bootloader and intalled latest twrp-3.0.2-1-h815.img 16.5M 2016-09-15 07:23:54 EDT for ( since 815/811) has same twrp on twrp website.
2) tried to install lineage OS rom for 811 but the recovery gave me problem that device is 815. Please install 815 rom, so I flashed 815 and it flashed fine and device booted and worked fine.
3)Now the problem starts, it crashed after some time and stuck in boot loop.
4)I had tried to boot in recovery and tried to restore back up image, but it crashed in the middle and after that I was not able to start to recovery.
5) Then I used the LG UP and flash kdz file H811V20r_00_0111.kdz for stock rom.
6) It flashed successfully, but device never got boot up and now I am unable to go to download mode.
7) Displaying small download mode symbol but device is stuck on the symbol and not going to Download mode.
I am stuck now, Is there any solution to come out of it. Please help me.
Thanks
Now my phone starts into download mode, and I flashed the original kdz h81120v_00_0425 using download mode, after flashing first time, it went to opitmizing Apps screen but restated in middle.
After that I tried multiple times sing hard reset, but it always freeze on 2nd screen when I press yes to reset.
I flashed kdz multiple time using LG up, but it stuck on LG logo with unlocked boot loader msg. not going to the bootloop.
Current condition is now I am unable to enter download mode it respond but freeze before entering download.
I can not hard reset as it always freezes on 2nd hard reset screen and not formatting.
No charging.
I am not sure, If this is some hardware issue or emmc fault , Please help me on this..
droidprav said:
Hi all,
I have put myself in horrible situation look like phone is bricked . I can not start my phone in recovery or download mode even.
here are the series of step I had performed:
1)Unlock bootloader and intalled latest twrp-3.0.2-1-h815.img 16.5M 2016-09-15 07:23:54 EDT for ( since 815/811) has same twrp on twrp website.
2) tried to install lineage OS rom for 811 but the recovery gave me problem that device is 815. Please install 815 rom, so I flashed 815 and it flashed fine and device booted and worked fine.
3)Now the problem starts, it crashed after some time and stuck in boot loop.
4)I had tried to boot in recovery and tried to restore back up image, but it crashed in the middle and after that I was not able to start to recovery.
5) Then I used the LG UP and flash kdz file H811V20r_00_0111.kdz for stock rom.
6) It flashed successfully, but device never got boot up and now I am unable to go to download mode.
7) Displaying small download mode symbol but device is stuck on the symbol and not going to Download mode.
I am stuck now, Is there any solution to come out of it. Please help me.
Thanks
Click to expand...
Click to collapse
droidprav said:
Now my phone starts into download mode, and I flashed the original kdz h81120v_00_0425 using download mode, after flashing first time, it went to opitmizing Apps screen but restated in middle.
After that I tried multiple times sing hard reset, but it always freeze on 2nd screen when I press yes to reset.
I flashed kdz multiple time using LG up, but it stuck on LG logo with unlocked boot loader msg. not going to the bootloop.
Current condition is now I am unable to enter download mode it respond but freeze before entering download.
I can not hard reset as it always freezes on 2nd hard reset screen and not formatting.
No charging.
I am not sure, If this is some hardware issue or emmc fault , Please help me on this..
Click to expand...
Click to collapse
thats not latest TWRP... latest unified h815- h811 name is twrp-3.1.1-0-g4 official
2) tried to install lineage OS rom for 811 but the recovery gave me problem that device is 815. Please install 815 rom, so I flashed 815 and it flashed fine and device booted and worked fine. why if you know its h811.. or is it.??
5) Then I used the LG UP and flash kdz file H811V20r_00_0111.kdz for stock rom. did you select refurbished .? this will clean wipe all partitions/
not sure how to help .. but next time search for uppercut// LGUP// and itll point you to file needed..
is it a h811 or h815.. could be that outside case is switched.?
raptorddd said:
thats not latest TWRP... latest unified h815- h811 name is twrp-3.1.1-0-g4 official
2) tried to install lineage OS rom for 811 but the recovery gave me problem that device is 815. Please install 815 rom, so I flashed 815 and it flashed fine and device booted and worked fine. why if you know its h811.. or is it.??
5) Then I used the LG UP and flash kdz file H811V20r_00_0111.kdz for stock rom. did you select refurbished .? this will clean wipe all partitions/
not sure how to help .. but next time search for uppercut// LGUP// and itll point you to file needed..
is it a h811 or h815.. could be that outside case is switched.?
Click to expand...
Click to collapse
I know I have done few things wrong in confusion, but realized later on. It is H811 TMO model for sure.
I did select refurbished while using LG UP
My phone is not completely dead.
Pressing power button it stuck on LG logo with unlocked boot loader msg. not going to the bootloop.
I am unable to enter download mode, it responds but freeze before entering download showing 4 blue dots.
I am able to enter recovery but I can not hard reset as it always freezes on 2nd hard reset screen and not formatting.
No charging, Device Manager shows nothing.
Is there a way to recover??
I am not sure, If this is some hardware issue or emmc fault , Please help me on this..
I'm in the same situation.
I tryed to install h81120v kdz and did it perfectly, but when the phone restarted... bootloop!
And now, if I try to enter in Download Mode, a message 'Download Mode' appear with 5 blue dots and nothing else.
My computer don't recognize it
I tryed the Unbrick method with SD Card but still the same
ReDemonBR said:
I'm in the same situation.
I tryed to install h81120v kdz and did it perfectly, but when the phone restarted... bootloop!
And now, if I try to enter in Download Mode, a message 'Download Mode' appear with 5 blue dots and nothing else.
My computer don't recognize it
I tryed the Unbrick method with SD Card but still the same
Click to expand...
Click to collapse
exactly same problem here but i managed to get out of 9008 brick by ls991 files now i have no download mode and only a charge before turning on message on the screen really pissed off now

HTC One m7wls Unknown boot up Issue

I have an HTC One m7 sprint and recently I encountered something usual in the sense that, my battery run out and I placed it on charge while the phone is off. After awhile I try to boot up the device but it takes forever to boot up. I have installed a cm-13 rom on the device which was very stable. I have twrp 3.1.1 installed on the device. my device is S-OFF and bootloader unlocked. For 3 days now I haven't been able to boot up the device to ROM because its always stuck at the cyanogen logo. Whenever i try to boot to recovery, the twrp logo comes and it takes forever to boot into the recovery menu. To be precise, 10-20 mins to boot to recovery menu. Now what buffles me the most is that, I can't format my data because anytime it starts to formatting process starts I get 2 kinds of red line errors:
E: failed to write /dev/block/mmcblk0p19: I/O error
Error opening: '/cache/recovery/ .version' (Read-only file system)
I haven't been able to Restore my backup because of the error above,
I haven't able to copy files to the internal storage
I haven't been able do anythings significant at the recovery
I can't install new ROM
here are some steps I have taken so far to help fix the problem but to no avail
I have flashed older versions of the custom recovery through fastboot but whenever I boot to the Recovery I still see the twrp 3.1.1 i flashed before the problem happened. Even though my command.exe tells me that the flash was successful but it doesn't overwrite the twrp 3.1.1
I have fastboot erased cache but nothing happened
I have tried to return the device to stock by RUU method but whenever I fastboot oem rebootRUU, the device powers off, reboots to white HTC logo attempts to boot phone instead of going into RUU mode.
I have a hunch that somewhat my internal storage is corrupted and is probably causing these problems but I don't know how to go round it.
Any help will be gratefully appreciated.

Stuck at the boot screen after trying to install custom recovery

Hello Everyone!
I tried different solutions from different posts and ended up stuck at the boot screen.
I unlocked the bootloader for my M31 and opened download mode to try and install TWRP recovery.
I used Odin's AP to start the installation but it failed. It showed some vbmeta error for installing custom recovery. So I decided to cancel and restart the phone. Here's where the first problem started I couldn't turn my device on. It dint exit the download mode. No matter how often I canceled it, it always comes back to download mode.
Here the error is shown:
Error Verifying VBMeta Image OKT_SIGN_NOED(3) and another error unfortunately I didn't take a snap of it.
I searched online and found this post: https://forum.xda-developers.com/t/a70-vbmeta-error-after-magisk-update-20-0.3982421/ but it is different from my case so I researched further and many people recommended flashing firmware or stock recovery using Odin and Yeah, I didn't find any of them for M31, So I went for the next best option- Orangefox recovery: Orangefox custom recovery but it's not maintained now but I went ahead with it anyway since I couldn't find any other recoveries.
But I haven't solved the error yet so,
I found another post : https://forum.xda-developers.com/t/recovery-unofficial-twrp-for-galaxy-m31s-exynos.4287617/
Here I followed the 3rd instruction which removed the error and then flashed the OFRP file. it worked and the device restarted but it got stuck on the boot screen
Here's the image:
https://prnt.sc/-UrOS2owkdsC
I couldn't go into the recovery or do anything because it always comes back to that screen.
I appreciate any help! Thanks!!
faced same issue.. waited till battery drained and entered into download mode using vol + and vol - and flashed stock rom from https://samfw.com/firmware/SM-M315F/INS
abu :D said:
faced same issue.. waited till battery drained and entered into download mode using vol + and vol - and flashed stock rom from https://samfw.com/firmware/SM-M315F/INS
Click to expand...
Click to collapse
Thanks for the link!
I couldn't find the stock ROM before so I haven't been using the phone since then. I just set it aside after the battery drained.
Thanks again!

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