Cannot lock bootloader

[ian_99]

So I'm trying to re-lock my bootloader,
I already looked up how to lock the bootloader and you can do that by booting in to fastboot and locking the bootloader from there. My OP6 was rooted but I removed all root related applications, I even reinstalled android.
I tought it would be as simple as unlocking the bootloader, but whatever I try I can't get my device to show up in the command promt when using the "adb devices" command while in fastboot. I tried reinstalling the ADB, fastboot and OP drivers a couple times but it doesn't help. I tried everything possible but I can't lock the bootloader.
Could somebody please help me with this?

 

[montecarlo5]

So I'm trying to re-lock my bootloader,
I already looked up how to lock the bootloader and you can do that by booting in to bootloader and locking the bootloader from there. My OP6 was rooted but I removed all root related applications, I even wiped android.
I tought it would be as simple as unlocking the bootloader, but whatever I try I can't get my device to show up in the command promt when using the "adb devices" command. I tried reinstalling the ADB, fastboot and OP drivers a couple times but it doesn't help. I tried everything possible but I can't lock the bootloader.
Could somebody please help me with this?

You have to be in fastboot mode ( power off phone, hold power and volume up til you see fastboot on screen) on your phone to do want to want, if you cant do it that way,you can try this tool, https://forum.xda-developers.com/oneplus-6/how-to/tool-msmdownloadtool-v4-0-international-t3798892 , it will return your phone to stock factory fresh. It will be back on 5.1.5 software. Good luck

 

[MrSteelX]

in fastboot mode just type without quote"fastboot oem lock"

 

[ian_99]

in fastboot mode just type without quote"fastboot oem lock"

I can boot into fastboot mode (I said bootloader instead of fastboot, my bad), but the command promt does NOT show any devices, so I can't use this command. All drivers are correctly installed.

 

[whizeguy]

Did you enable USB debug?

 

[ian_99]

Did you enable USB debug?

Yes I did
And I tried updating to android P but now I can't even access fastboot!
[UPDATE:]
I can finally boot into fastboot again, the only way to do this was to first boot into recovery and restart to fastboot from there.
And my device is still not detected by adb in fastboot

 

[fxz]

u do fastboot devices not adb devices

 

[ian_99]

I just tried doing this in a Windows 7 virtual machine, but it gives the exact same results, I really don't know what is cousing this

 

[ed-gonzo]

Then take tool all in one

 

[whizeguy]

Well.... Use msm download tool then.. Since you can go to fastboot, it will reset everything and lock the BL.

 

[ian_99]

Well.... Use msm download tool then.. Since you can go to fastboot, it will reset everything and lock the BL.

What a coincidence, I am watching a video on how you can fix a bricked OP6, wich does exaclty what you said.
Thanks!

 

[rhai]

I tought it would be as simple as unlocking the bootloader, but whatever I try I can't get my device to show up in the command promt when using the "adb devices" command while in fastboot.

You should do "fastboot devices" in fastboot mode!
I see thay you're doing "adb devices" instead which is wrong.

 

[ian_99]

You should do "fastboot devices" in fastboot mode!
I see thay you're doing "adb devices" instead which is wrong.

Oh god that actually worked, how could I have forgotten I had to use the "fastboot" command.
I can't thank you enough :victory:

 

[rhai]

Oh god that actually worked, how could I have forgotten I had to use the "fastboot" command.
I can't thank you enough :victory:

No worries. Cheers!