I am stuck at unlocked bootloader warning screen (Samsung m21) - General Questions and 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

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[Q] my device soft bricked

My device all the sudden restarted and entered now a continues restart booting. the Samsung logo appear only and device restarts.
I tried to install a new stock rom with odin, but i keep getting Fail error. tried to install a stock recovery with odin but fail error is what am getting too...
the device boot to download mode only and i cant boot to recovery mode.
I didnt download custom rom or recovery didnt root. the device out of no where bricked any help is appreciated...
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[Completed] LG K7 stuck in boot loop

My lg k7 is stuck in boot loop. I tried to reboot my phone into recovery so I could flash a new rom and get rid of my virus, but it went horribly wrong. I tried to boot it via TWRP using rom manager. I used rom manager because the app flashify wasn't working. When I tried to boot my phone into recovery via twrp using flashify it gave me the error "Secure booting error! Error Code : 1003 MODIFIED ! !" Then my device booted back up, but when I tried it with Rom manager which I didnt even install anything I was stupid and tapped boot into recovery mode, now im stuck in boot loop with the same "Secure booting error! Error Code : 1003 MODIFIED ! !" Error. I have tried to factory reset my device in the recovery mode, but it does literally nothing, and just throws me back into the bootloop. The model is m330.
Totalchaos32 said:
My lg k7 is stuck in boot loop. I tried to reboot my phone into recovery so I could flash a new rom and get rid of my virus, but it went horribly wrong. I tried to boot it via TWRP using rom manager. I used rom manager because the app flashify wasn't working. When I tried to boot my phone into recovery via twrp using flashify it gave me the error "Secure booting error! Error Code : 1003 MODIFIED ! !" Then my device booted back up, but when I tried it with Rom manager which I didnt even install anything I was stupid and tapped boot into recovery mode, now im stuck in boot loop with the same "Secure booting error! Error Code : 1003 MODIFIED ! !" Error. I have tried to factory reset my device in the recovery mode, but it does literally nothing, and just throws me back into the bootloop. The model is m330.
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Greetings and welcome to assist. It sounds like you may have a locked bootloader, there are 2 excellent threads here that will help you recover your device and flash twrp
https://forum.xda-developers.com/an...ck-firmware-rom-unbrick-lg-k7-k330-t-t3432878
https://forum.xda-developers.com/general/general/qa-metro-pcs-lg-k7-lgms330-t3331678
Good Luck
Sawdoctor
Thanks mate
Than you so much, It worked

S8+ stuck on boot screen after QF7 flash

I tried to flash TWRP on my S8+ and my phone got a bootloop . Then i tried to root it by Odin(SuperSU) and after the boot screen an error "Verification failed" came. Then I flashed the QF7 BL from Odin in the BL tab( which was a success in the first try), but then instead of a bootloop, the screen was stuck on the boot logo. I cant access TWRP now but can access download mode. I then tried to flash TWRP again but i cant access it( Odin shows successful).
Please help what can i do?? SM-G955F. OEM unlocked.
Thanks.
u need to flash BL,AP,CP,CSC (frimware ) files all together to get back to factory defaults
next time flash custom kernel using twrp after flashing twrp

Bootloop? Please help

My s8+ phone is stuck in a loop and i cant seem to fix it. The model is an SM-G955U. It is currently stuck with a screen flashing 'installing system update' and a black screen. I've tried to boot into recovery mode but all attempts have failed(gives failed to open recovery cause no file or such directory). Am i completely bricked? Id like any help that i can get. Thanks.
HelpPlease2121 said:
My s8+ phone is stuck in a loop and i cant seem to fix it. The model is an sm955u. It is currently stuck with a screen flashing 'installing system update' and a black screen. Ive tried to boot into recovery mode but all attempts have failed(gives failed to open recovery cause no file or such directory). Am i completley bricked? Id like any help that i can get. Thanks.
Click to expand...
Click to collapse
Download mode, flash stock image from sammobile.com etc with Odin 3.13.1

S6 fails to boot - help please - can flash via Odin and enter recovery

Hi Peeps,
I have an S6 that fails to boot, just boots into recovery mode. I can get into download and flash via Odin but will always boot into recovery instead of system.
There is a message in the recovery screen with:
No Support SINGLE-SKU
Supported API: 3
#MANUAL MODE v1.0.0#
--Applying Multi-CSC...
Applied the CSC-code : NZC
Successfully applied multi-CSC.
Failed to verify for dmverity hash tree
Reboot into recovery again
When rebooting or trying to power off it says:
"DMV Failed reboot"
Googling didn't seem to find anyone else with the same problem.
I've flashed combination file and that fails to boot, just stuck on loading screen. Though combination file doesn't reboot to recovery. I've only tried a 7.0 G920I firmware so far.
Have also tried TWRP and custom ROMs, same problem, won't boot and just goes back to recovery.
Now, I've opened the phone and the motherboard is marked G920F but the phone thinks it's a G920I and will only accept flash of G920I firmware.
I suspect that someone in the past has managed to flash G920I firmware onto a G920F device. Is this possible or are all motherboards marked G920F even if they're G920I?
Any ideas?
Flash the ROM but would erase the data on your S6. Be careful! Here is a video to fix this problem, you can have a try. youtu.be/zXSHe3oorIM

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