Fastboot, Samsung Galaxy A51 - Samsung Galaxy A51 5G Questions & Answers

Hello, i wanted to ask how to fix the fastboot mode.
Everytime when i try to access it, it just says "Entering Fastboot..."and thats all.
I dont want to close it, thats not my problem, i just wanna flash a recovery.img, and the fastboot seems not working. Any ideas?

M3DUS4 said:
Hello, i wanted to ask how to fix the fastboot mode.
Everytime when i try to access it, it just says "Entering Fastboot..."and thats all.
I dont want to close it, thats not my problem, i just wanna flash a recovery.img, and the fastboot seems not working. Any ideas?
Click to expand...
Click to collapse
this could be because the galaxy A51 wasnt built with fastboot, and the code to launch this option was just reused from a different device, or because something isnt connecting properly.

Hello, I have the same ... Android 11 (and currently 12) (from Frija). So it is not the fault of incorrect configuration or with connecting. Only something is wrong with this phone ...

I have this device and this solved it for me:
Enable OEM unlocking in developer settings
Shut down the phone
Hold volume up and volume down
Plug in a USB cable connected to a computer (the computer being turned on)
Keep holding
You're in download mode!
Side note: This might not work in USA or Canada, I am from europe and it works here. I have no idea if it works in another region. Also, you can't just flash a recovery.img on Samsung since there is no real "fastboot", you have to use download mode and Odin.

But I know how to enter download mode... Problem is Fastboot mode...

There is no fastboot mode on a modern Samsung device. If there is, it's fake and you cannot flash anything with it. As you can see even from Wikipedia, Odin is the Samsung replacement of fastboot.
So no fastboot, only download mode.
If a guide is saying to use fastboot, it is not compatible with Samsung.
If you would tell me why you specifically need fastboot, I'll be happy to tell you how you can do it with Odin, if possible.

Because I have Samsung Galaxy A51 5G (A516B) with new Android 12 and I can't do a root! Because I can't upload TWRP (custom recovery) because I haven't OEM unlock option in Deveoper Option. I tried trick with set back date by 7days but not succes. Everything I;ve metioned here - I did at my phone with Android 11.
And... I have read that I can turn this fu**ing OEM option by comend at ADB: fastboot oem unlock.
Phew ...
So this fastboot method is the last method to do a root with my phone.

Upload TWRP by Odin in download mode -ends red warning - of corse...
Have you any ideas?
I would be grateful for help...

I have read this fastboot method at:
How to Unlock Bootloader On Samsung Galaxy Phones [EASY GUIDE]
Are you looking for a Complete tutorial on How To Unlock Bootloader on Samsung Galaxy Phones? If yes, then you have come to the right place.
www.guidetoroot.com

Yeah, that guide is not relevant on any modern Samsung device. Besides, even if it was, which it isn't, you would first need to enable OEM unlocking from the Developer Settings.
But the fact that you don't have an option for OEM unlock is weird, since I have the exact same device model and it is there for me.
May I ask what is your region and is your phone locked to a telephone carrier?

My region is PLS - Poland. And not - phone is not locked. Have you the newest system Android 12?

Yes, I do. It's weird that there isn't even an option for you.
I'll try to come up with some new ideas if I have time...

I'll be glad for it...

Hej, do you have any idea?

stanwin said:
Hej, do you have any idea?
Click to expand...
Click to collapse
Have you tried everything listed here?

BloodyFruitDestroyer said:
Have you tried everything listed here?
Click to expand...
Click to collapse
Yes, I did. Evething exept the last one...

You could try it. It might be risky, but it's the only option I personally can come up with right now.

I've tried this option but Odin stuck on "files verification". Any help?

have any of you encountered this problem?
And how did you solve it?

You can also try searching for combination firmware for your device online

Related

wrong boot img flashed. Now phone stuck in bootloop and won't be detected by PC

Hi guys,
Before i start, just be informed that i have tried google all possible solutions and tried them but to no avail. I know its a long shot but perhaps someone may be able to help however small the chances are.
My phone is a Xiaomi Redmi Note 3 Snapdragon variant and is rooted.
What happened was, i tried installing TWRP (kenzo version) on my phone and so following the "instructions" in the downloaded file.
I used Flashify to flash the boot.img and then redmi_note_3_Twrp.img then the phone prompted me to reboot.
Now my phone is stuck in bootloop. The only thing i can do is to boot into Fastboot. So i tried accessing fastboot via ADB hoping to be able to some how flash the original boot.img back.
The problem i have now is that i am unable to access the phone at all even though i can go into fastboot. It wont be detected by my PC. I tried Minimal ADB and Fastboot and PdaNet.
Is there any other way for me to detect my phone and run some form of command to get it started again? Any help at all is appreciated. The phone is fairly new and i'm regretting trying to get the latest ROM for it.
I'm hoping i'll have some luck in a helpful community such as this.
Thanks guys.
Omg!! someone with the same problem as me. The same happened to me. Flashed a CWM file now am stuck in a Bootloop and ADB wont find my device either
Marticco said:
Omg!! someone with the same problem as me. The same happened to me. Flashed a CWM file now am stuck in a Bootloop and ADB wont find my device either
Click to expand...
Click to collapse
Fret not my friend. For i have found the solution and managed to unbrick my phone. Thank the good guys at MIUI for this.
Head over to the MIUI forum and search unbrick under the Redmi Note 3 forums. I can't post the link here unfortunately
You can also thank me after you unbrick your phone.
This only applies if you are uaing the Redmi Note 3 Pro
yea unfortunately i dont use that phone. I have a Lava Iris x1 Grand (Lollipop). I am still trying to get ADB find my device
Marticco said:
yea unfortunately i dont use that phone. I have a Lava Iris x1 Grand (Lollipop). I am still trying to get ADB find my device
Click to expand...
Click to collapse
Well if that's the case i suggest googling how to get into EDM mode for ur phone and using your phone brand's flash tool to flash a new ROM onto your phone. This means you will not be able to save your phone's memory. Is your phone's bootloader unlocked?
willetan said:
Well if that's the case i suggest googling how to get into EDM mode for ur phone and using your phone brand's flash tool to flash a new ROM onto your phone. This means you will not be able to save your phone's memory. Is your phone's bootloader unlocked?
Click to expand...
Click to collapse
yes it is unlocked,
i think? When i entered fastboot mode. One of my apps says bootloader enabled and when i typed 'fastboot devices' in the Minimal ADB and Fastboot its shows:
0123456789ABCDEF devices
whereas if I type 'adb devices' i just shows:
List of devices attached
The main problem is the driver, i cant get adb to find my device. I have tried the universal usb drivers like Kouch but no success. My device is listed in the Unspecified section in my computer

need bootloop help please

So far I always found answers to all my questions here without ever asking. This forum is awsome! Thanks to everyone here doing good work!
My problem: I have the European version of the Honor View 10. I opened bootloader, I installed the Magisk correctly with the 15.4 version, worked all fine. (thank you topjohnwu)
Then MY mistake ... I wanted to install Xposed Installer. I was not concentrated that moment and took the wrong version! From my other Honor phone (android 6.0, version 89, arm64). Absolutely stupid!
Phone restarted ... bootloop ... and goes into eRecovery. I tried everything I could there, clear dalvik cache, factory reset. > no change!
Then I thought ok, connect to PC, safe mode ... adb ... but no success. adb devices brings no result. PC does not find my phone anymore. I hoped I could get into my phone by connecting with PC, but it seems I am unable. So I can not help myself this way.
Next try was to force the phone to update with SD card. I only found asian update software, but I already did not care. I want to save my phone. Update starts, but after 5% it stops, update fail.
Now I hope that someone here can help. I have no idea what else I could do. Best regards, Markus
mark_at said:
So far I always found answers to all my questions here without ever asking. This forum is awsome! Thanks to everyone here doing good work!
My problem: I have the European version of the Honor View 10. I opened bootloader, I installed the Magisk correctly with the 15.4 version, worked all fine. (thank you topjohnwu)
Then MY mistake ... I wanted to install Xposed Installer. I was not concentrated that moment and took the wrong version! From my other Honor phone (android 6.0, version 89, arm64). Absolutely stupid!
Phone restarted ... bootloop ... and goes into eRecovery. I tried everything I could there, clear dalvik cache, factory reset. > no change!
Then I thought ok, connect to PC, safe mode ... adb ... but no success. adb devices brings no result. PC does not find my phone anymore. I hoped I could get into my phone by connecting with PC, but it seems I am unable. So I can not help myself this way.
Next try was to force the phone to update with SD card. I only found asian update software, but I already did not care. I want to save my phone. Update starts, but after 5% it stops, update fail.
Now I hope that someone here can help. I have no idea what else I could do. Best regards, Markus
Click to expand...
Click to collapse
Did you already try ro flash ramdisk and system sith stock images via fastboot?
alohahe3000 said:
Did you already try ro flash ramdisk and system sith stock images via fastboot?
Click to expand...
Click to collapse
I would flash anything ... if I could! That is my problem at the moment and I can not solve it.
When I start phone I get into Huawei eRecovery after two tries to boot > does not help!
When I connect to PC > phone gets not detected! (during boot try it gets connected shortly ... but then gets disconnected after some seconds, in between I can not get into phone via PC)
So when I would want to use fastboot .... not possible because of that issue. I tried to connect in fastboot mode ... but no difference. Actually I do not understand why I can not connect to PC anymore!
The only way I can imagine now is flash or update something via SD card. I tried with asian update.zip, but it will only go to 5% .... and then ends.
But to be honest ... I am not very optimistic about finding any solution. I think only some very smart pro from this site might have an idea. But not sure if these guys read questions about bootloops.
mark_at said:
Next try was to force the phone to update with SD card.
Click to expand...
Click to collapse
Try to flash via Fastboot the stock rom... do a full wipe and reboot.
here the link to the stock ROM:
https://mega.nz/#!W9hjiTgZ!_ZGq7V83bkWPF_Ue7_c41wVXNrQ_YjnsQUxRS0_MevU
Taobaibai said:
Try to flash via Fastboot the stock rom... do a full wipe and reboot.
Click to expand...
Click to collapse
Thanks for the link. But how can I flash via fastboot when my phone is not detected from the PC? That is my main problem at the moment!
That is why I wrote about all things I had tried already. And being unable to connect to the computer is really worrying me!
"adb devices" will not find my phone!
mark_at said:
Thanks for the link. But how can I flash via fastboot when my phone is not detected from the PC? That is my main problem at the moment!
That is why I wrote about all things I had tried already. And being unable to connect to the computer is really worrying me!
"adb devices" will not find my phone!
Click to expand...
Click to collapse
You have to boot into fastboot modus. When booting, push power and Volume down button. A white screen appears if device is connected with PC.
Then try "fastboot devices". If your device is displayed, you can flash with "fastboot flash" system image. Stock system.img download link can be found in AOSP thread, second post.
alohahe3000 said:
You have to boot into fastboot modus. When booting, push power and Volume down button. A white screen appears if device is connected with PC.
Then try "fastboot devices". If your device is displayed, you can flash with "fastboot flash" system image.
Click to expand...
Click to collapse
Exactly
alohahe3000 said:
Stock system.img download link can be found in AOSP thread, second post.
Click to expand...
Click to collapse
Or just use my link. I copied it from the AOSP Thread
I managed to get my phone displayed when I entered fastboot devices.
And I managed to flash the img!! Hurra !!
Thank you very very much to everyone here helping me ...
I thought that nothing would work because when I typed "abd devices" nothing happened. But when I typed "fastboot devices" the phone was there.
mark_at said:
I managed to get my phone displayed when I entered fastboot devices.
And I managed to flash the img!! Hurra !!
Thank you very very much to everyone here helping me ...
I thought that nothing would work because when I typed "abd devices" nothing happened. But when I typed "fastboot devices" the phone was there.
Click to expand...
Click to collapse
It wasn't so difficult.
Viel Spaß mit dem Smartphone!!!
one more thing I have to add:
after flashing the system.img from the link above .... I have FRP lock .... that was not before.
does it mean I have to relock my bootloader and then unlock it once again? In some other thread I found that information.
mark_at said:
one more thing I have to add:
after flashing the system.img from the link above .... I have FRP lock .... that was not before.
does it mean I have to relock my bootloader and then unlock it once again? In some other thread I found that information.
Click to expand...
Click to collapse
and now I relocked bootloader .... and guess what? bootloop again ... and I can not unlock it again, because I did not think about enable OEM unlock! It says necessary to unlock FRP before.
I am terribly sorry for being such an idiot!!
mark_at said:
and now I relocked bootloader .... and guess what? bootloop again ... and I can not unlock it again, because I did not think about enable OEM unlock! It says necessary to unlock FRP before.
I am terribly sorry for being such an idiot!!
Click to expand...
Click to collapse
Never ever relock bootloader untill you have a backup plan. We have dload method till emui 7 buut not sure on EMUI 8 so can't suggest you anything at the moment. Someone played with EMUI 8 can guide you through it.
I understand that I was not allowed to relock bootloader! I feel awful and stupid about it ... believe me!
I was able to erase FRP with HCU client from DC Phoenix.
After that I was in phone again
And afterwards I could open the bootloader again.
Halleluja!!
Thanks for everyone's help here ...

Help - Bricked (accidentally locked bootloader with TWRP installed)

It was late and I was cleaning up my old OP5T, getting it ready to sell. I thought I had plugged in my OP5T, but I still had my OP6 plugged in when I ran "fastboot oem lock". Now it won't boot and I can't unlock it (I'm assuming because I can't get into the OS and "enable OEM unlocking" anymore).
Is there anything I can do?
try using search next time because its already been talked abput here https://forum.xda-developers.com/oneplus-6/help/relock-bootloader-t3798135
Actually, I DID read that. I didn't just roll off the cabbage truck. If you have time to post snippy replies (I also searched YOUR post history), then maybe you can point out where in that thread the answer to my question is. I could see if there was a thread where this specifically happened, or if it had been talked about over and over, but I couldn't find one. You do know this is a fairly new device, right? TBH, you're just being rude. To count on someone to hit the right search terms for a single thread where the info exists is just asinine.
1) I have not seen anyone with this situation on the OP6 yet
2) The OP5T had an unbrick tool
3) Most phones have a way to restore the OS to factory
If it can't be restored without calling OnePlus, then why not just say so? I'll answer for you, it's because you actually enjoy replying in such a manner. Grow up.
Have you tried the mega unbrick guide?
https://forum.xda-developers.com/oneplus-6/how-to/guide-mega-unbrick-guide-hard-bricked-t3796051
Flapjack said:
It was late and I was cleaning up my old OP5T, getting it ready to sell. I thought I had plugged in my OP5T, but I still had my OP6 plugged in when I ran "fastboot oem lock". Now it won't boot and I can't unlock it (I'm assuming because I can't get into the OS and "enable OEM unlocking" anymore).
Is there anything I can do?
Click to expand...
Click to collapse
I don't think relocking your bootloader will disable the "enable OEM unlock" toggle in the OS. You may just be able to unlock your bootloader as normal again. You should be able to use the fastboot recovery method to restore your OS.
[email protected] said:
Have you tried the mega unbrick guide?
https://forum.xda-developers.com/oneplus-6/how-to/guide-mega-unbrick-guide-hard-bricked-t3796051
Click to expand...
Click to collapse
I did, but I got the "software image does not exist" error. Does it matter whether I downloaded the 5.13 or 5.15 vesion?
mikex8593 said:
I don't think relocking your bootloader will disable the "enable OEM unlock" toggle in the OS. You may just be able to unlock your bootloader as normal again. You should be able to use the fastboot recovery method to restore your OS.
Click to expand...
Click to collapse
I tried several times. It throws the following error, which when searched for, always seemed to be someone forgetting to enable OEM unlocking in settings:
Code:
FAILED (remote: oem unlock is not allowed)
Success! I was able to get it to work with the drivers from this post. No other drivers worked. I also forced the COM port to the first available (in my case, COM1) vs the one it popped up on. Until I did that, I would just get a huge list of ports that had no device attached. Once I had it on COM1, it was the only device that showed up in the list. The first time after that, I got a "Sahara Communication Failed" error, but it went away after rebooting the phone back into EDL mode again.
Thanks for the help!
Flapjack said:
Success! I was able to get it to work with the drivers from this post. No other drivers worked. I also forced the COM port to the first available (in my case, COM1) vs the one it popped up on. Until I did that, I would just get a huge list of ports that had no device attached. Once I had it on COM1, it was the only device that showed up in the list. The first time after that, I got a "Sahara Communication Failed" error, but it went away after rebooting the phone back into EDL mode again.
Thanks for the help!
Click to expand...
Click to collapse
Hi buddy,
I tired to relock the bootloader and success in that but the phone stuck at fastboot mode, neither restarting to system nor to anything. Kindly help me if i can flash the stock rom in locked bootloader is so how.
THanks in adv
Did you try msm download tool ?
My OnePlus was bricked and it's bootloader is locked too, I have tried most of the steps like msm and those Bat files etc. But error is coming
"Remote : Flashing is not allowed in locked state"
Even tried that all in one tool that also can't unlock my bootloader
Now plz someone show me steps it will be a great help

failed root fastboot only help please

I bought a t mobile one plus 7 pro - version gm31cb-on 9.5.10 before I read about the hassle it can be compared to an unbranded phone. The bootloader is unlocked.
I tried the msm tool to go to international version but it got stuck on parameter preload so I decided to try to root and get rid of the tmobile flash screen later.
long story shortened, the phone is stuck on the warning screen.
Pressing buttons, I can get it into fastboot but adb doesnt see the phone to flash/push anything.
If I try to boot into recovery, it sticks at the warning screen.
can I somehow get adb to see the phone in fastboot mode?
do you know if i need a certain os/file so i can get past the parameter preload with msm?
i followed the steps in the msm tutorial.
if msm sees the phone and it gets to parameter preload does it mean it is not a driver issue but maybe the wrong software?
Any advice is appreciated.
thank you for your time and expertise
Marc
through fastboot
I am using the universal fastboot and adb tool and trying to flash boot twrp and start over
current error: failed remote recovery a no such partition
after fastboot --set-active=b
same error
update 2
somehow, after simply trying over and over i got twrp on partition a
i think i will stay here until a kind member can direct me to an img that will work
thank you
marcadamf said:
I bought a t mobile one plus 7 pro - version gm31cb-on 9.5.10 before I read about the hassle it can be compared to an unbranded phone. The bootloader is unlocked.
I tried the msm tool to go to international version but it got stuck on parameter preload so I decided to try to root and get rid of the tmobile flash screen later.
long story shortened, the phone is stuck on the warning screen.
Pressing buttons, I can get it into fastboot but adb doesnt see the phone to flash/push anything.
If I try to boot into recovery, it sticks at the warning screen.
can I somehow get adb to see the phone in fastboot mode?
do you know if i need a certain os/file so i can get past the parameter preload with msm?
i followed the steps in the msm tutorial.
if msm sees the phone and it gets to parameter preload does it mean it is not a driver issue but maybe the wrong software?
Any advice is appreciated.
thank you for your time and expertise
Marc
Click to expand...
Click to collapse
You just need to update Qualcomm drivers.
https://forum.xda-developers.com/oneplus-7-pro/how-to/guide-mega-unbrick-guide-hard-bricked-t3934659
blas4me said:
You just need to update Qualcomm drivers.
https://forum.xda-developers.com/oneplus-7-pro/how-to/guide-mega-unbrick-guide-hard-bricked-t3934659
Click to expand...
Click to collapse
doing so now...
thank you for the help.
I somehow got it up and rooted.
will msm work while rooted or mess up root?
I have a gm1915 wich is not listed in the link for the drivers? any thoughts?
These should work. As for MSM tools use the international version.
If you can't shut off device, hold power + Vup for about 10 seconds without being connected to a power source. If your fast enough, keep device plugged, and just press Vdown, to boot recovery.
https://drive.google.com/file/d/1JoHF6RF1THVn3pQWywaJz2URGTPxL2pH/view
not sure where you are at right now, but i installed a wrong os version (android 10 on my phone with pie on it). It would only boot into fasdtboot screen no matter what I did or tried. Could not get adb to recognize it, had no twrp or rom installed correctly. No way to fix it, could not use MSM tool as phone had to be able to be shutoff, which mine couldn't. never recognized it due to that. tried drivers to no avail. not really many answers out there, til I found out about fastboot roms.
check out this page: https://forum.xda-developers.com/oneplus-7-pro/how-to/rom-stock-fastboot-roms-oneplus-7-pro-t3931424
* IMPORTANT: in above link, remember to only download the OS version that fits your phone previously. DO NOT try to update your phone to a different version using that method. Also this method will NOT work on a branded phone, so if your phone is originally a T-Mobile phone then unfortunately this is not a solution for ya.
You may also want to check out this page as well: https://www.reddit.com/r/oneplus/comments/3izejg/so_youve_just_bricked_your_oneplus/
I hope this helps. The Fastboot Rom solution worked for me, it saved me from throwing my phone in the trash. I ran the bat file and it did the rest.

Your device is corrupt. It can't be trusted and it will not boot

Hello,
So, apparently i messed up. I installed nethunter on my phone, everything was working well, finished the configuration and then i had the idiotic idea to lock the bootloader since it was locked at the beginning when i received the phone, so i locked the bootloader not knowing the consequences of that.
Now i don't have how to go to enter in recovery mode, i can't boot. The program adb and fastboot doesn't detect the phone when i do adb devices or fastboot devices. I don't know how to proceed from here.
Any ideas ?
Kind regards,
C666PO said:
Hello,
So, apparently i messed up. I installed nethunter on my phone, everything was working well, finished the configuration and then i had the idiotic idea to lock the bootloader since it was locked at the beginning when i received the phone, so i locked the bootloader not knowing the consequences of that.
Now i don't have how to go to enter in recovery mode, i can't boot. The program adb and fastboot doesn't detect the phone when i do adb devices or fastboot devices. I don't know how to proceed from here.
Any ideas ?
Kind regards,
Click to expand...
Click to collapse
Yes,there are several unbrick tools on the forum i used this one and it worked for me!
I am not able to share links so im posting a few screew shots but if you google oneplus 7 pro unbrick you ahould find this thread easy
C666PO said:
Hello,
So, apparently i messed up. I installed nethunter on my phone, everything was working well, finished the configuration and then i had the idiotic idea to lock the bootloader since it was locked at the beginning when i received the phone, so i locked the bootloader not knowing the consequences of that.
Now i don't have how to go to enter in recovery mode, i can't boot. The program adb and fastboot doesn't detect the phone when i do adb devices or fastboot devices. I don't know how to proceed from here.
Any ideas ?
Kind regards,
Click to expand...
Click to collapse
I replied to you from the xda labs app and i couldnt attach a link but it works from the browser so i apologise for my first reply hope this one is more helpfull
https://forum.xda-developers.com/on...mega-unbrick-guide-hard-bricked-t3934659/amp/

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