[GUIDE] Re-Lock Bootloader Galaxy s10|s10+|s10e

Search This thread

adzo73

Senior Member
Apr 3, 2015
119
7
Is there somewhere other than samsmobile to get latest firmware for S10plus exynos beceause for some reason its impossible for me to download fr o m there and its not the first time I've encountered this problem there and this time i desperately need genuine firmware to lock etc as i need to hand phone back to samsung.thanks to anyone taking time to read this..
 

robbo1947

Senior Member
Jun 2, 2007
424
277
Manchester
Is there somewhere other than samsmobile to get latest firmware for S10plus exynos beceause for some reason its impossible for me to download fr o m there and its not the first time I've encountered this problem there and this time i desperately need genuine firmware to lock etc as i need to hand phone back to samsung.thanks to anyone taking time to read this..

Have you tried Frija?
https://forum.xda-developers.com/ga...ija-samsung-firmware-downloader-t3910584/amp/
 
  • Like
Reactions: thiefxhunter

Tayyab Sohail

Member
May 12, 2015
19
2
19
Allah abad
Lock bootloader

Bro i tried this method but my phone show only download mode and show failure message
If i will go to settings then turn off oem and again follow your method.will this work
 
Mar 28, 2015
30
1
Need some confirmation

OK, sorry for delay in getting back to this question of locking and unlocking the bootloader on the Galaxy S10.
During the last few days I have locked, unlocked, locked and unlocked again, probably 15 or 20 times to test various scenarios.
Please remember, each time you lock or unlock the bootloader all of your data is wiped.. any Root will also be gone. You will also be needing your current firmware.
This is for the Galaxy S10 without TWRP.

Scenario 1. Your phone is rooted with Magisk.
Go into Developers options and check OEM options, the switch must be ON (to the right). If it isn't turn it ON.
Turn off your phone. Press and hold the Bixby and Volume-down button, then connect with USB to your computer. (The cable shouldn't be connected until after you press the buttons).
Within seconds of USB connection the Download screen will appear. You will see 3 optiions, choose and Long press volume up and hold button until you see the 2 options at bottom of screen. Choose and hold volume up until screen goes off. Then the S10 logo screen will briefly apppear, before it flicks back to the Download screen with the words 'VBMETA: Error verifying vbmeta image etc' at the top, as the image below.
This is all good so far. Leave the phone exactly as it is with this screen showing and make sure the phone is still connected to the computer.
On your computer, fire up Odin3_v3.13.1, you can leave the Reboot option in Odin ticked. Locate your firmware on your computer and put the 4 file parts (BL, AP. CP and CSC) into Odin.
Let Odin finish.
The phone will reboot ready for setup.
The Unlocked bootloader warning screen will be gone.


Scenario 2. Your phone has been rooted but isn't now, and the greyed out OEM switch is ON
Easy, turn off your phone and proceed from the 2nd paragraph of Scenario 1.


Scenario 3 Your phone has been rooted but isn't now, and the greyed out OEM switch is OFF
Sorry, but in this situation, you are going to have to root your phone with Magisk as the OEM switch will only be available when rooted.
When rooted, proceed as Scenario 1.


Scenario 4 Your phone has never been rooted, and the greyed out OEM switch is ON i.e. you unlocked the bootloader but never proceeded to root the phone
Turn off your phone and proceed from the 2nd paragraph of Scenario 1.

If you want proof that I have locked and unlocked time and time again see HERE


:victory:

As far I know KNOX is a physical fuse bit in memory and can't reverse once tripped. So, my question basically is "Samsung apps like s health, dex, s pay, secure folder will work after re-locking the boot-loader and flashing stock ROM?1"
 

SamarSS123

New member
Dec 13, 2020
4
0
Plz someone help, I have my Samsung A10 rooted and bootloader unlocked everything was going right but today I accidentally turned off oem unlock . I immediately closed everything and re-open developer option and oem unlock was turned off I again turned it on now I am in fear that does my phone bootloader automatically locked or I can safely reboot my device
 

mastermindthunder

New member
Feb 9, 2022
3
0
I was thinking of a way to block the bootloader, and I came up with something very basic, so please who can try the method, share whether it works or not. (This method was checked and it WORKS !!)
Warning: I am not a super developer, just one more user who wants to help the community
Warning 2: This Process will erase everything in its path, remember to make a backup of your internal memory.
This series of steps is aimed at inexperienced users, if you think you are missing or there are many steps, this guide is not for you.
Without more to say, let's start.

How to re-lock bootloader:
1. Turn off your device.
2. Press Bixby Volume down and connect your device to a PC to start the download mode (now you can release both buttons)
3. Read the text below on the Download Mode screen
to block or unblock the Bootloader.
4.- Long press the vol (- or +) button as best suits you.
LOCK BOOTLOADER:
5. Long press the volume up button ( ) until the computer is restarted (this will erase your data and restart automatically). :fingers-crossed:
Ready! Now you have a device with an OEM lock.

Good luck my friends!!! :D
it was for me volume up + down then plug type-c cable
 

Top Liked Posts

  • There are no posts matching your filters.
  • 7
    I was thinking of a way to block the bootloader, and I came up with something very basic, so please who can try the method, share whether it works or not. (This method was checked and it WORKS !!)
    Warning: I am not a super developer, just one more user who wants to help the community
    Warning 2: This Process will erase everything in its path, remember to make a backup of your internal memory.
    This series of steps is aimed at inexperienced users, if you think you are missing or there are many steps, this guide is not for you.
    Without more to say, let's start.

    How to re-lock bootloader:
    1. Turn off your device.
    2. Press Bixby Volume down and connect your device to a PC to start the download mode (now you can release both buttons)
    3. Read the text below on the Download Mode screen
    to block or unblock the Bootloader.
    4.- Long press the vol (- or +) button as best suits you.
    LOCK BOOTLOADER:
    5. Long press the volume up button ( ) until the computer is restarted (this will erase your data and restart automatically). :fingers-crossed:
    Ready! Now you have a device with an OEM lock.

    Good luck my friends!!! :D
    5
    I look forward to your findings. As i am running my phone as my daily driver now i am hesitant to re root it if this method wont work. I have my fingers crossed though :)

    samsung doesn't allow you to unlock and then lock back the device multiple times. It only works once, then your bootloader stay unlocked for ever.

    OK, sorry for delay in getting back to this question of locking and unlocking the bootloader on the Galaxy S10.
    During the last few days I have locked, unlocked, locked and unlocked again, probably 15 or 20 times to test various scenarios.
    Please remember, each time you lock or unlock the bootloader all of your data is wiped.. any Root will also be gone. You will also be needing your current firmware.
    This is for the Galaxy S10 without TWRP.

    Scenario 1. Your phone is rooted with Magisk.
    Go into Developers options and check OEM options, the switch must be ON (to the right). If it isn't turn it ON.
    Turn off your phone. Press and hold the Bixby and Volume-down button, then connect with USB to your computer. (The cable shouldn't be connected until after you press the buttons).
    Within seconds of USB connection the Download screen will appear. You will see 3 optiions, choose and Long press volume up and hold button until you see the 2 options at bottom of screen. Choose and hold volume up until screen goes off. Then the S10 logo screen will briefly apppear, before it flicks back to the Download screen with the words 'VBMETA: Error verifying vbmeta image etc' at the top, as the image below.
    This is all good so far. Leave the phone exactly as it is with this screen showing and make sure the phone is still connected to the computer.
    On your computer, fire up Odin3_v3.13.1, you can leave the Reboot option in Odin ticked. Locate your firmware on your computer and put the 4 file parts (BL, AP. CP and CSC) into Odin.
    Let Odin finish.
    The phone will reboot ready for setup.
    The Unlocked bootloader warning screen will be gone.


    Scenario 2. Your phone has been rooted but isn't now, and the greyed out OEM switch is ON
    Easy, turn off your phone and proceed from the 2nd paragraph of Scenario 1.


    Scenario 3 Your phone has been rooted but isn't now, and the greyed out OEM switch is OFF
    Sorry, but in this situation, you are going to have to root your phone with Magisk as the OEM switch will only be available when rooted.
    When rooted, proceed as Scenario 1.


    Scenario 4 Your phone has never been rooted, and the greyed out OEM switch is ON i.e. you unlocked the bootloader but never proceeded to root the phone
    Turn off your phone and proceed from the 2nd paragraph of Scenario 1.

    If you want proof that I have locked and unlocked time and time again see HERE


    :victory:
    2
    Awesome. Will give it a go in the next day or two and report back but given your success I'm hoping I'll have the same.
    Cheers

    Don't forget the :good:
    1
    I see. There is another method, that seems to work, tested by @robbo1947 that he explained here.

    I did not check it myselff yet, but it worked for robbo1947. All credits goes to @robbo1947 !! Please let us know if that worked for you or not.

    I am going to have a go again in the next few days to prove to myself and others that it is possible to relock the bootloader after rooting. Will let you know.
    Watch this space.
    1
    No dramas, thanks heaps for your reply.

    So it seems I am in scenario 3 meaning I'll need to re root my phone which is fine. However, when I hold down the bixby and volume up and plug in I don't get the option to long hold volume up which I previously did. I only have press volume up or down. Is this because my bootloader is already unlocked? I should still be able to re root my phone in this scenario shouldnt i?

    Yep, your bootloader is unlocked.
    When you have re-rooted and you go into Developer options you will be able to control the OEM switch and ensure it is ON.
    Then when you get into Download mode you will see that option of LONG press Volume-up.
    I've just added video proof to original post.