Need help locking bootloader please - Samsung Galaxy S10 Questions & Answers

I was looking to unlock the bootloader and flash TWRP, root etc then realised I wouldn't be able to get on to half my work apps due to security restrictions.
When I start my S10 at the moment I get the warning screen saying the phone's bootloader is unlocked and to press the power button to continue, but everything I have tried from locking via adb commands to booting to download mode etc won't relock the bootloader again.
Anyone able to help me with some instructions on how to relock the bootloader please?
Thank you

MartinEv1980 said:
I was looking to unlock the bootloader and flash TWRP, root etc then realised I wouldn't be able to get on to half my work apps due to security restrictions.
When I start my S10 at the moment I get the warning screen saying the phone's bootloader is unlocked and to press the power button to continue, but everything I have tried from locking via adb commands to booting to download mode etc won't relock the bootloader again.
Anyone able to help me with some instructions on how to relock the bootloader please?
Thank you
Click to expand...
Click to collapse
Is it only oem unlocked (unlocked bootloader) or is Knox tripped?
You can relock the bootloader, but you can not untrip Knox.
Here is a thread about it:
How to re-lock bootloader
After successfully rooting my S10 i realised that i didn't quite needed it and it didn't advantage me to much so i re flashed it all back to the stock firmware and the phone is working fine however, i am struggling to re lock the bootloader. I...
forum.xda-developers.com

I relocked the bootloader, in the same way I unlocked it. Again, hold down the Vol Up key until the bootloader locks.
Relock Bootloader on Samsung Galaxy S10, Galaxy S10+, and Galaxy S10e (Fully Working Method)​
Relock Bootloader on Samsung Galaxy S10, Galaxy S10+, and Galaxy S10e (Fully Working Method)
In this tutorial, I will show you how to relock bootloader on Samsung Galaxy S10, Galaxy S10+, and Galaxy S10e easily. Relocking the bootloader will also allow you to remove the unlocked bootloader…
www.thecustomdroid.com

Related

[Q] xt1053 Unlocked Bootloader Warning on screen but not actually unlocked?

I must have missed a step when I unlocked my XT1053 last year. I never did anything with it and assumed that because it gives the the caution screen when I turn it off and back on, that the bootloader is unlocked. However, now that I decided to get down and do stuff, it's telling me via third party apps that my phone isn't actually unlocked. There's no super user app or anything. Do I need to go through the unlocking process again? I'm on 4.4.4.
Me again. I'm following the directions for rooting it and have flashed TWRP 2.8.6.0 but when I select Recovery, there's a dead android and it says "No Command."
You have an unlocked boot loader but you don't have root privelages.Also try holding down volume down+power on no command
It takes some reading comprehension but the tutorials here really are excellent. I guess I have a philosophical question: why would you unlock the bootloader without the intention of rooting the phone? I had (obviously) confused the terms.
s3ars said:
I must have missed a step when I unlocked my XT1053 last year. I never did anything with it and assumed that because it gives the the caution screen when I turn it off and back on, that the bootloader is unlocked. However, now that I decided to get down and do stuff, it's telling me via third party apps that my phone isn't actually unlocked. There's no super user app or anything. Do I need to go through the unlocking process again? I'm on 4.4.4.
Click to expand...
Click to collapse
Can you boot the phone into Fastboot/Bootloader mode? What does it say for the status?
If its LOCKED Status 0, then your bootloader is locked. If its LOCKED Status 2 (or 1), then you are "Relocked" (i.e. the bootloader was unlocked, then someone used the Fastboot OEM LOCK process to relock the bootloader). The phone will always show the UNLOCKED Warning message screen if your status is no longer 0. (As users, we can toggle between Unlocked and Relocked, but can't get it back to Locked Status 0).
Since the XT1053 can unlock its bootloader via the code from Moto's web site, you can always just follow the bootloader unlock process again, using the same unique code for your phone.
After your phone's bootloader is showing UNLOCKED Status 3, you may root by following -> http://forum.xda-developers.com/moto-x/moto-x-qa/instructions-unlocking-rooting-dev-ed-t2649738 (Step 8 IS necessary) Please be sure to use the latest TWRP fastboot IMG file and Installable ZIP of SuperSU
---------- Post added at 08:31 AM ---------- Previous post was at 08:26 AM ----------
s3ars said:
It takes some reading comprehension but the tutorials here really are excellent. I guess I have a philosophical question: why would you unlock the bootloader without the intention of rooting the phone? I had (obviously) confused the terms.
Click to expand...
Click to collapse
Since doing the bootloader unlock process is "desctructive" (i.e. wipes use data/apps from the phone), some will unlock the bootloader when they first get the phone, run with it, and maybe root later... that way when they do decide to root, they wont need to also wipe the phone and have to set it back up from scratch.
But that is the only reason I can think of why one would unlock the bootloader, and not root. At the same respect, if you don't have a phone which is branded Developer Edition, you've already voided the phones warranty by requesting the code from Moto, so, why not root immediately?

Bootloader back to locked after debrand without me doing it.

Hello.
Normally after relocking the bootloader on these phones it will say relocked. While debranding my phone I had the phone bootloader unlocked and rooted, with the untrusted boot up message. Half way through the debranded procedure I had massive issues with encryption and it not letting me past which took an age to sort out.
Once I passed that I managed to finish debranding the phone, but after flashing the the new firmware to the phone I stopped seeing the unlocked bootloader message, when I hadnt relocked the bootloader. When I checked, the bootloader was locked and frp was unlocked.
Everything is working fine with the phone, receiving updates, all themes working, everything working great.
I just don't fully understand how it's relocked itself, but Instead of it showing relocked it shows the original locked, but frp is now unlocked while the phone is locked, both originally said locked.
Anyone have any ideas. ????
Same for me
Look at
http://forum.xda-developers.com/p9-plus/how-to/guide-how-to-lock-unlocked-relocked-t3465486
Did you find out why frp doesn't go back to locked Instead of staying unlocked. I only ask because my NatWest app says i'm rooted or security settings have changed and won't let me log in via fingerprint. I wonder if it's because of this. ????
Edit. If you remove USB debugging and OEM unlock it relocks the frp lock.
Good thank you for sharing it

Purchased Used P20 Pro with unlocked bootloader

Hi all,
I've purchased a used P20 Pro from a friend which has an unlocked bootloader and has been previously rooted. I normally keep my phones stock so I want to lock relock the bootloader (I have the code) but despite trying to follow various guides I have been unsuccessful.
Would anyone be able to guide me through the process of relocking the bootloader please?
The main reason I like to keep stock is manufacture updates etc and I don't have the knowledge to maintain a rooted phone.
R89B said:
Hi all,
I've purchased a used P20 Pro from a friend which has an unlocked bootloader and has been previously rooted. I normally keep my phones stock so I want to lock relock the bootloader (I have the code) but despite trying to follow various guides I have been unsuccessful.
Would anyone be able to guide me through the process of relocking the bootloader please?
The main reason I like to keep stock is manufacture updates etc and I don't have the knowledge to maintain a rooted phone.
Click to expand...
Click to collapse
I don't believe that an unlocked bootloader will prevent you from getting updates. As far as I know the only difference is the warning you get when you boot that "you can't trust the phone."
IF YOU BRICK YOUR PHONE IT'S YOUR RESPONSIBILITY
Don't know if there is another way but of you have fastboot and adb you can do it:
1. Make sure developer options are enabled
2. Connect your phone to the computer using USB cable.
3. Open a command window and type 'adb boot bootloader'
4. Once the device has booted into the bootloader mode type 'fastboot oem lock'
This WILL ERASE all your user data and you will have to configure everything from scratch. You will need the unlock code if you ever want to unlock it again so make sure you don't loose it.

[SOLVED] Your device is Currupt, it can't be trusted and will not boot.

Yesterday, I was going to lock my bootloader to cell my Nokia 8 cuz' I needed money. Being the noobie that I'm I didn't have my unlock key saved anywhere. and couldn't get a new one because the stupid Bootloader unlock app doesn't work on Pie. I did know that locking the bootloader doesn't require a key. So I just went with it without remembering that I still had TWRP instead of stock boot img installed. So when I locked the bootloader the phone booted into a screen similar to the unlocked Bootloader warning screen. But it said "Your Device is corrupt. It can't be Trusted and will not boot." Instead. So now I have locked bootloader with TWRP that I can't boot into. I still can boot into fastboot mode but I can't do much Because LoCkEd BooTlOaDeR. The only sulotion is to unlock the bootloader with an unlock key Which I don't have and flash stock boot. So please help. You'll be literally saving my life. This is my first thread ever on the internet so forgive me If I made any mistakes:laugh:
EDIT: I took my phone to the service centre near me and they were able to fix it
CommieTurtle said:
Yesterday, I was going to lock my bootloader to cell my Nokia 8 cuz' I needed money. Being the noobie that I'm I didn't have my unlock key saved anywhere. and couldn't get a new one because the stupid Bootloader unlock app doesn't work on Pie. I did know that locking the bootloader doesn't require a key. So I just went with it without remembering that I still had TWRP instead of stock boot img installed. So when I locked the bootloader the phone booted into a screen similar to the unlocked Bootloader warning screen. But it said "Your Device is corrupt. It can't be Trusted and will not boot." Instead. So now I have locked bootloader with TWRP that I can't boot into. I still can boot into fastboot mode but I can't do much Because LoCkEd BooTlOaDeR. The only sulotion is to unlock the bootloader with an unlock key Which I don't have and flash stock boot. So please help. You'll be literally saving my life. This is my first thread ever on the internet so forgive me If I made any mistakes:laugh:
EDIT: I took my phone to the service centre near me and they were able to fix it
Click to expand...
Click to collapse
Hello! I have the same problem! (((You were not interested in what exactly or how you should do to correct the error? And how much money did you get for repair?
Well you can use original OST not NOST and flash signed images (.NB1) without unlocking bootloader.
KonikoO said:
Well you can use original OST not NOST and flash signed images (.NB1) without unlocking bootloader.
Click to expand...
Click to collapse
Only with service point authorization as far as I know. OST (and NOST by extension) usually show you a login prompt when you launch them. Service Points login to a server that generates a temporary unlock key, which allows OST to reflash the partitions. With the proper authorization, even NOST could flash .qlz files (as long as the images inside are official and signed) with a locked bootloader.
Since we don't have service point permission we have to patch the tool to ignore it (both NOST and the hacked OST). It will still try to request the temporary key, fail, and pass an empty value to the bootloader. To get the bootloader to accept the following flashing commands, you have to unlock it.

Bootloader unlocked not rooted NFC pay not working

I unlocked my bootloader just before the pie update s. I noticed my bank NFC pay stopped working around this time. At this time I don't really need the bootloader unlocked. Is there any harm relocking my bootloader? or possible bricking? If I leave it unlocked how can I hide my unlocked bootloader by rooting ?
bigshowjh said:
I unlocked my bootloader just before the pie update s. I noticed my bank NFC pay stopped working around this time. At this time I don't really need the bootloader unlocked. Is there any harm relocking my bootloader? or possible bricking? If I leave it unlocked how can I hide my unlocked bootloader by rooting ?
Click to expand...
Click to collapse
This is pretty bad if your bank app thinks that phone is 'rooted' just because BL was unlocked.
If you didn't do anything else (Recovery, eRecovery, Ramdisk, Kernel are still stock), you can relock BL, no harm, it will just Factory reset once again (prepare back-ups)
AFAIK, installing Magisk does not hide from apps that BL was unlocked
zgfg said:
This is pretty bad if your bank app thinks that phone is 'rooted' just because BL was unlocked.
If you didn't do anything else (Recovery, eRecovery, Ramdisk, Kernel are still stock), you can relock BL, no harm, it will just Factory reset once again (prepare back-ups)
AFAIK, installing Magisk does not hide from apps that BL was unlocked
Click to expand...
Click to collapse
Thank you for your response. All are still stock. I just unlocked it a while ago to remove emergency broadcast but did it through ADB instead. No need at this time to be unlocked. Thanks again.

Categories

Resources