Unable to unlock bootloader - Samsung Galaxy A30s Questions & Answers

Hello everyone,
I am using a Samsung Galaxy A30s SM-A307FN/DS, I enabled the OEM Unlock option in developer mode, I am trying to unlock the bootloader by holding the Volume UP button while in Download Mode but this does not seem to work because I have the new download mode which goes straight in the download mode without asking if I am sure to continue. There is no text saying hold volume up to unlock bootloader
Thanks for anyone willing to help me.

PROBLEM RESOLVED:
To unlock the Bootloader on the Samsung Galaxy A30s SM-307FN do this steps:
Prepare the USB-C cable, connect it to a computer
Shut down the phone, when it's completely OFF, press volume UP and volume DOWN at the same time and after 1 second connect the USB-C cable.
Now, hold for 7 seconds the volume up button, press it again and your bootloader will be unlocked!
Congratulations! This literally took me a day to know :I

steelpino80 said:
PROBLEM RESOLVED:
To unlock the Bootloader on the Samsung Galaxy A30s SM-307FN do this steps:
Prepare the USB-C cable, connect it to a computer
Shut down the phone, when it's completely OFF, press volume UP and volume DOWN at the same time and after 1 second connect the USB-C cable.
Now, hold for 7 seconds the volume up button, press it again and your bootloader will be unlocked!
Congratulations! This literally took me a day to know :I
Click to expand...
Click to collapse
That works with (almost) every Samsung deevices.

Related

[Q] Bootloader Unlocking

So i was following these steps mentioned (developer.sonymobile.com/unlockbootloader/unlock-yourboot-loader/) hoping to unlock the bootloader...
It says i need to connect the mobile to the PC in fastboot mode by connecting the phone while pressing the volume up key...
But always it seems to enter in charging mode
I wonder if it does even work, so my question....
Has anyone of you tried it, does it work or is it still a dream to unlock the bootloader in xperia c.....?
Kame_Sennin said:
So i was following these steps mentioned (developer.sonymobile.com/unlockbootloader/unlock-yourboot-loader/) hoping to unlock the bootloader...
It says i need to connect the mobile to the PC in fastboot mode by connecting the phone while pressing the volume up key...
But always it seems to enter in charging mode
I wonder if it does even work, so my question....
Has anyone of you tried it, does it work or is it still a dream to unlock the bootloader in xperia c.....?
Click to expand...
Click to collapse
press and hold the power+volume down when is connected when the light is off quickly change your finger to volume up. look if it works!?

Stuck at entering fastboot mode

How can I get my Galaxy Note 20 Ultra out of stuck at 'entering fastboot mode'?
Hold down power and volume down until it reboots back to recovery. I got stuck there last week and that's what worked for me.
Sent from my SM-N986U1 using Tapatalk
Is this problem solved? I cannot boot into bootloader mode, thanks!
Switch off the device. Then hold volume up and down buttons and insert the USB cable plugged to PC. You will get to download/odin mode
shantanil said:
Switch off the device. Then hold volume up and down buttons and insert the USB cable plugged to PC. You will get to download/odin mode
Click to expand...
Click to collapse
Download mode is different from fatboot mode, I can enter, and works ok download mode. However, fastboot does not, it gets stuck in entering fastboot mode and no fastboot command works
I got same issue here, I've tried rooting via TWRP and after data wipe and "reboot to recovery" it got stuck in same thing and doesn't move at all, if I hold power and vol down it just boots the device which i dont want since i need to flash magisk as a last step. if anyone encountered this or knows how to fix it i'd be helpful
I'm not rooted but I've had past Samsung devices that I was able to root and if I'm not mistaken Samsung phones aren't able to boot into fastboot mode because Samsung removed the ability to. You can run commands via ADB mode but I think that's about it
adj998 said:
I'm not rooted but I've had past Samsung devices that I was able to root and if I'm not mistaken Samsung phones aren't able to boot into fastboot mode because Samsung removed the ability to. You can run commands via ADB mode but I think that's about it
Click to expand...
Click to collapse
Yea I fixed it somehow I don't even know myself
i cant eneter into download mode by using volume up and volume down ... the only thing that happens is the battery display kicks in .. is there a trick on how long to hold the volume bottons .. or any special way of doing it .. or for the usb c while trying to connect it to the computer
it gets stuck into fastboot entering if i try to do it the old fashion way .. please help
Guys, turn off the phone, press volume up and volume down together, and plug the usb cable while pressing volume up and down, and wait until the phone enter in downloading mode. This work for me.
leonardo_evaldy said:
Guys, turn off the phone, press volume up and volume down together, and plug the usb cable while pressing volume up and down, and wait until the phone enter in downloading mode. This work for me.
Click to expand...
Click to collapse
Thanks Man. This worked.
Since we can"t enter into fastboot mode is it possible to flash boot.img with adb commands?
I m having the same problem with a21s(a217f). I can t enter download mode using key combinations and the other way launching it from recovery doesn t work, it stays stuck at,, entering fastboot mode,,
The ROM is already bricked, it says in recovery when i try to factory reset the following error:,, can t mount. /system (structure needs cleaning)
Even with,, apply up. with adb,, doesn t work, it just doesn t get detected on my computer when i checked with adb tools.
! The only thing that works is that I can access my sd card and apply a update from sd card but I don t know where to get the update file. (I ll edit if it works to flash stock rom from,, apply update from sd card,, )
Anybody got some ideas or should i burn my motherboard and replace it?
sorry for bad english
Honestly plug device into PC.
Power off device
hold all 3 side buttons. Volume up and down and power/bixby.
Should usually work.
After in fast boot you must press a button Volume button to find via odin.
ivoe said:
Honestly plug device into PC.
Power off device
hold all 3 side buttons. Volume up and down and power/bixby.
Should usually work.
After in fast boot you must press a button Volume button to find via odin.
Click to expand...
Click to collapse
I already did that, unplugged the battery, reconnected it after 1min, connected my phone to the computer and pressed all 3 side buttons, still doesn t work. I guess the download mode is deleted or something..
Volume up & down, no side key, then connect to PC. Works for me. Connect to PC first does not work for me.
guru96 said:
I already did that, unplugged the battery, reconnected it after 1min, connected my phone to the computer and pressed all 3 side buttons, still doesn t work. I guess the download mode is deleted or something..
Click to expand...
Click to collapse
It wouldn't be deleted as it's a safety protocol if the device has a bad update and freaks out.
Maybe try to person above method.
Normally I can enter download mode with any of these methods if you cannot I'd suggest trying to get the device replaced due to software malfunction
altojd said:
Since we can"t enter into fastboot mode is it possible to flash boot.img with adb commands?
Click to expand...
Click to collapse
Samsung phones use a tool called Odin to flash firmware. If you're flashing custom firmware firmware you'll need to have your bootloader unlocked.
I got mine into download mode just now. It's a Galaxy A13 .. Like stated above, try to hold all three buttons down and connect to USB. I had to let go before it showed the battery charge icon. From off. If not from off try from charging. I think that's what I did just now. Plug the usb -> let it show the charging icon (from powered off!) -> hold all three buttons, let it power on, let go. DONE.
just follow this video it helped me a lot to unlock my boot loader

Bootloader black screen?

Tried to boot into bootloader to unlock it but... download mode not appear
When i go to recovery and select "reboot bootloader " i have a blackscreen and need to reboot recovery with keys... trying lot of time but no way
Anyone can help?
SM-F916B XXU1ATHE
buying on samsung from France
mric034 said:
Tried to boot into bootloader to unlock it but... download mode not appear
When i go to recovery and select "reboot bootloader " i have a blackscreen and need to reboot recovery with keys... trying lot of time but no way
Anyone can help?
SM-F916B XXU1ATHE
buying on samsung from France
Click to expand...
Click to collapse
Reboot Phone in Download Mode: Connect USB-cable to your computer. Hold down "Volume up" and "Volume down" at same time. While holding down, connect the USB-cable to your phone.
> Connect the Galaxy Z Fold 2 to your PC/Laptop via a USB Type-C cable whilst the device is switched on
> Hold the power key and tap restart
> Once the phone begins to restart hold both Volume Up + Volume down together
> Press the Volume Up key on the next menu to enter download mode
Thanks for help guys. Another question, is anyone have root whith Magisk? I try but it don't work for me...

boot bootloader bricks it?

I booted the fold Z into recovery and then pressed boot bootloader and the phone shut down and now won`t power up.
Anyone know what is happening?
Okay, I pressed volume up and volume down plus power button and it eventually booted into bootloader mode
To get to bootloader, from off hold up and down volume and plug in USB cable. Hit up volume when requested and you're good to go...
This seems to be the standard on all Samsung devices now...

Question my Galaxy A12 won't boot to android or download mode help me pls

so I just tried to install unofficial TWRP 3.5.0 on my Samsung galaxy a125m and everything went fine, Odin said done. Then I just tried to start TWRP by pressing power and vol up and it didn't start, so I thought I might have done something wrong and rebooted to download mode and flashed it again, Odin said done, then I unplugged the USB cable and now it won't boot, neither to the system or recovery, even to download mode, it did enter download mode a few times before but I pressed the wrong button and had to cancel and enter again, now it won't even enter download mode so I can't flash stock rom to fix bootloop... pls how can I solve this I'm desperate
when I try to enter download mode by pressing volume up + volume down it just shows up charging mode without any numbers, then it turn on and shows Samsung logo, unlocked bootloader warning screen, and the Samsung logo again, but then just restarts and repeats all again...
when I try to press volume up + volume down + power, nothing really happens...
someone help me please
You need to keep both volume up and down pressed, then plug in the charging cable. It should enter download mode, no need to press the power button like in older samsungs.
PhotonIce said:
You need to keep both volume up and down pressed, then plug in the charging cable. It should enter download mode, no need to press the power button like in older samsungs.
Click to expand...
Click to collapse
yeah I did that a lot of times, it used to work now It doesn't anymore
in this video you can see what's going on, I'm pressing both volume keys and nothing happens
Your browser is not able to display this video.
Is the cable plugged into a charger and on?
Have you considered that your volume buttons may not be working?
Same hear
Try attaching your phone to the PC, and then pressing volume down + power to reset the phone, (for about 7~8 seconds) then immediately press the volume down and up buttons, that's how I recovered from it. Tell me if it worked
juliano-oh! said:
Try attaching your phone to the PC, and then pressing volume down + power to reset the phone, (for about 7~8 seconds) then immediately press the volume down and up buttons, that's how I recovered from it. Tell me if it worked
Click to expand...
Click to collapse
Please help it dosent worked
No pc detection
No download mode
No recovery
No charging
Hello, unfortunately in these cases the only solution is to enter download mode, check if any button is damaged or if the cable works and if it is well connected, press the buttons harder, hold down the volume up and volume down buttons at the same time , by pressing the strong buttons, for about 6 seconds and then connect the cable. If you don't try another cable to see if that's the problem there is no other solution as the phone is not recognized by an app that can put it into download mode when turned off the solution is the one I already told you about. I hope you have fixed that problem. Sorry for my bad English.
developeMYWORLD said:
Please help it dosent worked
No pc detection
No download mode
No recovery
No charging
Click to expand...
Click to collapse
To Escape the Black Screen of Death or Bootloop
To boot to RECOVERY MODE
Method 1
First connect phone to the PC for 30 minutes
Hold all 3 keys and release volume down when it buzzes.
Method 2
1. Plug in USB cable to PC
2. Hold down all 3 buttons on phone.
3. When it buzzes release volume down and plug in USB cable to phone.
Then restore your backup or install a ROM
To boot to DOWNLOAD MODE
Method 1
First connect phone to the PC for 30 minutes
Hold all 3 keys and release power when it buzzes.
Method 2
1. Plug in USB cable to PC
2. Hold down all 3 buttons on phone.
3. When it buzzes release power button and plug in USB cable to phone.
Then use Odin to flash official firmware.
@physwizz
I am having a similar problem with the Samsung A12 SM-a125u
I never could enter into this "Downloading mode".
I tried flashing the stock ROM through ADB with fastboot, and I have another problem that I've never seen before: ADB can see the device while in recovery mode, but fastboot can't. And so it won't allow me to flash the ROM and I don't even know how Odin is supposed to help yet; I think I needed to enter Downloading mode for that, but I can't get into it.
I'm working on this phone for a friend who was given it because his friend's mom doesn't remember the password to it. Does that matter? It's worth noting that because of that I cannot get in to turn on OEM unlocking or dev mode, but idk why that would come into play in recovery mode. Also, the model indicates this is an AT&T phone, and tutorials online have acknowledged this model in their "applicable models" list at the beginning of their tutorials, but I know that carrier phones can cause problems all over the place (stop buying carrier locked phones people!); is this a problem?
How the heck do I flash the stock ROM to this this?

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