Question Fastboot won't respond - Samsung Galaxy S21 Ultra

Hi,
I've been messing around with rooting and adb. I decided I wanted to relock my bootloader but whenever I go to lock it nothing happens. This has happened before with fastboot commands. I know my device is recognized but nothing happens. Any help would be greatly greatly appreciated.

same here

Related

[Q] HELP: Stuck in Fastboot

I recently attempted to return my HTC One to stock ROM and all that fun stuff. I must have made a mistake somewhere along the line because now I'm stuck in fastboot. Phone won't even boot into ROM or Recovery.
Any attempts to use fastboot commands from the prompt just result in failure.
I'm not sure what to do from here. Any help would be greatly appreciated.
I've figured it out for the most part. Well on my way to getting my device back to normal.

Hard-bricked from nothing?

So as my friend was sleeping last night apperently his phone was hardbricekd. When he woke up it wouldn't leave the screen: boot up failed. Failed to validate boot image: ret=-1. He texted me from his pc asking for help. I told him to boot into recovery and just reflash stop. When he tried it said: Fastboot demon: failed to initialize partition table. What can he do??? It was stock and hadn't been rooted in a very long time!
Same problem: Stuck in fastboot
I'm having the same issue. After having 6.0 for a few days, my Nexus 6 shutdown while I was using it. It will only boot into Fastboot mode, with the same errors. I finally got adb to recognize it when plugged into my computer, but don't really know how to proceed. The command "fastboot oem unlock" says I need to allow this option on my phone, but I can only get into fastboot so that's impossible. All the guides I see to flash anything require this step.
I've done some digging. http://forum.xda-developers.com/nexus-6/help/stuck-fastboot-flash-to-recovery-t3266921 ... This forum suggests it's not fixable by a home user, but if anyone else has more info please let me know. You guys on xda are infinitely more knowledgeable than I am on this.
Nevermind. A little more reading, and I understand more of the jargon. Locked bootloader, no TWRP = no bueno. RMA is my only option. Guess I'll order a Nexus 5X and take steps to make sure this won't happen again.

LG D415 Bricked

Hey,
My D415 seems to be bricked but I can still boot it into Fastboot mode, although the only command that seems to work in fastboot is fastboot oem unlock, everything else fails with remote unknown command.
Help is appreciated!
Hey if you get solution please reply here
i also have same problem since one year but i cant get any solution.
I am also facing the same issue
Pl. Help

HTC M7 Looping

Hi,
Suddenly my HTC M7 went on loop restart. I tried to use Power and Vol Down button options but nothing worked. Getting message of S-On, Security-On etc. Tried to flash the Mobile using bootloader and all available stuffs on google, but did not work.
Please let me know, if there is a way to fix this problem. The only thing I can access is the Memory card that I can insert in other phone and do something.
desperately looking for a guidance on this.
First you need to grab a fastboot getvar all to be able to help you, we need to know more about your device.
You need to boot in fastboot and run "fastboot getvar all" (you need htc drivers and adb installed).
anshulroy said:
Hi,
Suddenly my HTC M7 went on loop restart. I tried to use Power and Vol Down button options but nothing worked. Getting message of S-On, Security-On etc. Tried to flash the Mobile using bootloader and all available stuffs on google, but did not work.
Please let me know, if there is a way to fix this problem. The only thing I can access is the Memory card that I can insert in other phone and do something.
desperately looking for a guidance on this.
Click to expand...
Click to collapse
You will need to flash the latest stock ROM you can find. That is what worked for me. If you don't know how, there are plenty of YouTube videos that explain how.
Download fastboot and start from there. (I don't haven't made enough posts to post links, so hopefully someone else can)
Also, you will need to use htc_flashboot (attached here) since the normal flashboot seems to have issues with HTC devices.
Try that and report back here.

A guide for flashing TWRP?

I've been searching all over the place...
Could anyone point me at a guide for newbs?
Thanks!
X
1xcalibur1 said:
I've been searching all over the place...
Could anyone point me at a guide for newbs?
Thanks!
X
Click to expand...
Click to collapse
First, you need your bootloader to be unlocked. It's pretty easy if you have that done already.
You'll need ADB and Fastboot. It can be tricky to get the right drivers. The driver used when your phone is connected in normal mode is not the same when connected in fastboot mode, in my experience anyway. You'll want the 15sec ADB driver and you'll need to update the driver when it is in fastboot mode.
Next, get the correct twrp img and put it in the ADB folder(you'll need a different one based on flashing a pie rom or a q rom). You may want to rename it so it's easier to type in fastboot.
To enter fastboot mode, hold volume up and plug in the usb cable. The LED should light up blue.
Open a command prompt and navigate to wherever you've installed ADB(mine is on C:\ so it's really easy).
Type "fastboot devices" to double check if the driver is installed and your phone is connected in fastboot mode.
------It should show something like: BH9090808E fastboot
Then type "fastboot flash recovery twrp.img" - or whatever you've named the file. It will take less than a few seconds.
Then type "fastboot reboot" and let your phone reboot.
Done
Thanks a lot for the reply!
I've been experiencing the exact issues you described. I'm having issues unlocking the Bootloader. "Fastboot.exe devices" does not show anything, the phone is with a blue led on and a balck screen and when I look in Device Manager there's an "Other" Android device with an "!".
Could you please share the drivers you mentioned? Because I really went through
everything and none was accepted. Also the 15 Seconds ADB Drivers did not help.
Thanks!
1xcalibur1 said:
Thanks a lot for the reply!
I've been experiencing the exact issues you described. I'm having issues unlocking the Bootloader. "Fastboot.exe devices" does not show anything, the phone is with a blue led on and a balck screen and when I look in Device Manager there's an "Other" Android device with an "!".
Could you please share the drivers you mentioned? Because I really went through
everything and none was accepted. Also the 15 Seconds ADB Drivers did not help.
Thanks!
Click to expand...
Click to collapse
My apologies. It's been so long since I've started from scratch, I must've gotten the drivers mixed up. The 15sec ADB is for the phone connected in normal mode.
I'm pretty sure this one is the fastboot one:
https://developer.sony.com/file/download/xperia-xz1-compact-driver/
If not, I'm sorry because that's all I have.
I nailed it eventually!
For anyone that comes across this thread,
this video will solve all your problems with adb drivers:

Categories

Resources