Complete Samsung Galaxy S21 Lock Bootloader Tutorial | S21+ & Ultra too
ฝัง
- เผยแพร่เมื่อ 24 ส.ค. 2024
- I have the Samsung Galaxy S21 Ultra in this video and will be showing you how to lock the bootloader in a few easy steps.
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Note: Relocking the bootloader will ERASE all of your personal data. Please back up important pictures, videos (and other bits of data) ahead of time.
Requirements:
Galaxy S21 Download Mode - • How to Boot the Galaxy...
Developer Mode - • How to Turn On Galaxy ...
We start off by booting the smartphone into Download Mode because we need to actually unlock the bootloader. Long press the Volume Up button at the splash screen to enter "unlock mode" and then confirm that you want to lock the bootloader as directed.
This will force your device to reboot and it will perform the factory data reset automatically.
It will actually reboot again after the reset has finished, and then the phone will begin to boot back into the Android OS. This first boot back into Android will take longer than normal so be patient here.
After a few minutes, you should be greeted with the Android activation screen. Go ahead and log into your accounts, make sure you have a connection to the internet (through WiFi or a mobile data SIM) and then check for an OTA update.
You can even enable Developer Mode here again if you want to disable the OEM Unlocking toggle again (which you should consider doing).
However, the toggle may not be there at first. It took me a few minutes of checking and then rebooting the phone before the toggle was revealed to me again. This is normal and nothing to get worried about.
When it appears, you can toggle it off to secure up the Galaxy S21 and complete the relock tutorial. It will then instruct you to reboot the phone one last time before using the phone like normal.
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Relocking the Galaxy S21 bootloader will not undo KNOX being tripped, but it will let you download and install OTA updates like normal again.
So easy after 2h trying to know how to do that aha, thx !!
Thank you very much :)
you're most welcome :)
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If not, then liking the video, subscribing to the channel, and sharing it online are all great things that can help, too
thank you !
When you say original firmware you mean the firmware that originally shipped with the device or any stock firmware with a later android version?
any official samsung firmware
Please i have s21+ korean version and it doesn't have esim available,what if i flash the firmware to another country's firmware will i get the esim capability. If yes what country firmware do you recommend i switch to?
when i try to reset it, it takes me back to to bootloader screen says downloading and has an error. "Reason vbmeta: Error verifying vbmeta image: HS_IMTHSGAUEMSAC HELP!!!!
Same issue here. Plz help
Did u flash stock ROM?
So i should first download and flash 100% stock firmware and then relock the bootloader right?
Thanks for the great info, however my download mode (showed at 3:58) does NOT have the volume up option anymore. I am trying to relock the bootloader but couldn't find a way to do it, my download mode only has volume down option (restart device)
Please help!
are you booting into download mode with the USB cable method?
@@ExplainingAndroid yes indeed
Can you tell if it's possible to install like CalyxOs since it's possible to relock the bootloader?
it's never advised to relock the bootloader after installing a custom ROM
i know this video is old but can i relock the bootloader after unlocking it and nothing bad happens?
How do I find your other videos?
you can find all of my videos here - th-cam.com/users/AndroidExplainedTipsvideos
help to lock bootloader S21+, i tried but the result is already unlock and OEM pushbotton is deseable. THx
Does this work with US model?
I dont have the oem unlocking option in my settings. I'm on an s21.
He told you to register the device by checking for an update then wait awhile / reboot and it will come back
@@Official__RILO no, it does not work at least with t-mobile.
@@JohnDoe-mf5db I didn't even have to reboot. I'm with o2
@@Official__RILO what model brand carrier and android version are you on?
I did everything here but my bootloader is stilled greyed out?