Need help with KNOX removal - Samsung Galaxy A51 Questions & Answers

I have a Samsung A51 with MDM lock & passcode lock. Andriod Version 10.
Device cannot enter download mode, cannot reboot to bootloader, cannot factory reset also.
How do I remove the MDM lock on this device, or is there a way I can force this device to download mode?

To force download mode:
Power device off completely with no cables connected
Plug a USB cable into your PC, do not yet connect your phone
Hold both Volume + and - buttons, do NOT press Power, and while holding them plug in the USB cable
Device should start with a prompt, follow the instructions to enter download mode

Related

Xperia P Unlock Bootloader

Switch Off Your Device & Connect It To The Computer Using USB Cable While Enabling Fast Boot Mode (Press & Hold Volume Up Button To Trigger Fastboot Mode). Windows Will Start Driver Installation As soon As You’ll Connect Your Device To The Computer While Keeping It In Fastboot Mode.
When I get that part I get into fastboot, there is about 5 seconds and then immediately goes out, someone help me please

Soft brick cannot enter either recovery or bootloader mode. Advice needed.

I formatted data and flashed Quantum Stock ROM (did not flash "RMM bypass zip"). After starting the phone once I tried to install a GSI (Treble) ROM. Disaster.
The phone is softbricked(?).
1. If connected to power source or PC the phone keeps restarting.
2. If no cable is attached, after powering on it shows logo and then switches off.
3. Cable connected or not connected, no matter which combination of buttons I press I just CANNOT enter recovery or bootloader mode.
Please advice on how to proceed. Thank you. :fingers-crossed:
Solution:
When the phone is powered off, hold VOL UP + VOL DOWN and insert the usb cable that is connected to a PC.
A screen will appear giving option to enter "download mode" by pression VOL UP. Do it.
Now the phone is in download mode.
Use ODIN to flash the latest firmware.
English is not my first language
I'm with the same issue!! I already flash the latest firmware but doesn't worked.

I Do Not Have Access To Download Mode Galaxy a30s

Hello everyone! the problem is on the galaxy a30s
1.- I can enable the developer options, when I try to enable it gives me a message that the developer options were enabled but the section does not appear!
2.- at the time of wanting to enter in the download mode with the keys while, cell phone off, volume + - and connect usb type c to the computer only charging appears on the screen.
3.-In another attempt to enter in the download mode, i use the recovery options and select the download mode, the phone restarts in the system and not in download mode.
4.- already tried to restore to factory mode from the recobery but it tells me that mdm does not allow it and the phone is restarted in the system, I have my account registered in the phone, does not allow me to factory reset or encrypt the phone, when I select it encrypt appears enabled but then it is automatically disabled
Any suggestion will be welcome, already try disconnecting the battery vol + - and connecting the cable, but do not enter the download mode either, any option to use jig mode?
thanks for your time and regards.
To boot into Download Mode boot into Recovery Mode. And select Bootloader

No option to unlock bootloader?

I want to root my phone with Magisk, so, following the instructions here:
I enabled OEM unlocking on my SM-A516B (European, not US or Canada and it's running the latest offical software (Android 12)) and rebooted to download mode via adb (goes to a "fastboot" mode when I select bootloader mode from recovery mode), but I don't see any option to unlock the bootloader. The English text on the screen says only:
Code:
Downloading...
Do not turn off target
Do not disconnect the USB cable during the software update!
Volume Down Key + Side key for more than 7 secs
:Cancel (restart phone)
There is also some Korean text, a DID code and a barcode. Holding volume up does nothing.
I'd seriously appreciate any ideas on how to proceed!
So I found the solution for myself: I don't want to go to the download mode, but instead hold valume + and - and plug in a USB cable.

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?

Categories

Resources