How do i re-unlock my bootloader? Xiaomi redmi note 7 [lavender] - Android Q&A, Help & Troubleshooting

Hello everyone!
I have unlocked my bootloader a few years ago and installed lineageOS since.
Now i came across a thread about another OS i wanted to install, instructions saying that i should update my firmware, i did that and it seems this has locked my bootlaoder again.
I think this also has caused trouble in my banking app, because it keeps saying my device is rooted even though its not. I have uninstalled magisk. Before that i never had any problems with the app on customROM.
Is there any way i can make this undone or unlock it again without data loss? I am currently using customfox Recovery if this is any relevant.
Thanks ahead

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https://forum.xda-developers.com/t/dkb-tan2go-app-on-rooted-device.3835355/page-27
you have custom recovery on phone? for sure your bootloader is unlocked then.

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alecxs said:
https://forum.xda-developers.com/t/dkb-tan2go-app-on-rooted-device.3835355/page-27
you have custom recovery on phone? for sure your bootloader is unlocked then.
Click to expand...
Click to collapse
No, it's not anymore! The unlocked sign is gone, i can't enter bootloader fastboot* but fortunatelly i still can boot my phone and enter recovery mode.

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sure about that? bootloader locked phones would go in RED state on custom binaries (such as custom recovery) not able to enter TWRP.
https://source.android.com/docs/security/features/verifiedboot/boot-flow

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alecxs said:
sure about that? bootloader locked phones would go in RED state on custom binaries (such as custom recovery) not able to enter TWRP.
https://source.android.com/docs/security/features/verifiedboot/boot-flow
Click to expand...
Click to collapse
Absolutely! Whenever i used to boot my phone before it would say unlocked right under the xiaomi logo. I am lucky it didn't completly bricked.

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what recovery you mean is able to boot on locked bootloader (link)?

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alecxs said:
what recovery you mean is able to boot on locked bootloader (link)?
Click to expand...
Click to collapse
Customfox

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never heard about Customfox, do you have a link?

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alecxs said:
never heard about Customfox, do you have a link?
Click to expand...
Click to collapse
sorry meant OrangeFox

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OrangeFox Recovery is not signed and can therefore not boot on locked bootloader.
please double check from fastboot
Code:
fastboot getvar unlocked

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alecxs said:
OrangeFox Recovery is not signed and can therefore not boot on locked bootloader.
please double check from fastboot
Code:
fastboot getvar unlocked
Click to expand...
Click to collapse
I don't understand what i am supposed to do! I can't enter fastboot!

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OrangeFox has option to reboot into bootloader? still you can do it from adb
Code:
adb reboot bootloader

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alecxs said:
OrangeFox has option to reboot into bootloader? still you can do it from adb
Code:
adb reboot bootloader
Click to expand...
Click to collapse
black screen like when i tried with buttons!

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looks like you didn't update firmware right. fastboot comes before recovery, it is in abl partition. without abl it can't boot into recovery, so most likely fastboot works but you can't just see the logo.
regardless of that you have OrangeFox Recovery, it provides full access to all partitions. you can flash anything you want.
as for the backup, depends if OrangeFox Recovery ask you for lockscreen credentials, then you can backup your data.

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alecxs said:
looks like you didn't update firmware right. fastboot comes before recovery, it is in abl partition. without abl it can't boot into recovery, so most likely fastboot works but you can't just see the logo.
regardless of that you have OrangeFox Recovery, it provides full access to all partitions. you can flash anything you want.
as for the backup, depends if OrangeFox Recovery ask you for lockscreen credentials, then you can backup your data.
Click to expand...
Click to collapse
I don't think i can flash anything.
Why would the boot screen not show the "unlocked" sign anymore?
Can i make this undone maybe by flashing a previous firmware?
I can backup and did that already but i am still scared that i might screw up my device even more.

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If bootloader were locked this would require user-settable root of trust stored in tamper-evident storage.
The unlock logo is just another picture, like the fastboot bunny. You probably messed up logo partition, that's why you can't see it.
you can flash any zip from OrangeFox. you can even dump or flash partitions not listed in menu. here is a list of partitions you can adb pull or flash with dd (or simg2img)
Code:
adb devices
adb shell ls -d /dev/block/bootdevice/by-name/*
of course you should know what you're doing, flashing the wrong partitions can brick.

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alecxs said:
If bootloader were locked this would require user-settable root of trust stored in tamper-evident storage.
The unlock logo is just another picture, like the fastboot bunny. You probably messed up logo partition, that's why you can't see it.
you can flash any zip from OrangeFox. you can even dump or flash partitions not listed in menu. here is a list of partitions you can adb pull or flash with dd (or simg2img)
Code:
adb devices
adb shell ls -d /dev/block/bootdevice/by-name/*
of course you should know what you're doing, flashing the wrong partitions can brick.
Click to expand...
Click to collapse
So if you say my device isn't locked after updating the fw i trust you.
But how do i get my banking app to work again? It keeps saying that my device is rooted. I tried hiding it through magisk, i uninstalled magisk but nothing helps. Any idea?

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if hardware-level key attestation is enforced, there is nothing you can do to hide the unlock state.
Magisk may no longer be able to hide bootloader unlocking from apps
The developer of Magisk has discovered that Google may have started using hardware checks to determine if a device has been bootloader unlocked.
www.xda-developers.com
you could however try older methods. just make sure you wipe app data and do not start the app before hiding.
Hide My Applist - A Brief Guide
Hide My Applist Guide Hide My Applist is a LSPosed module by Dr-TSNG (nullptr). Often referred to as HMA. In the simplest terms HMA aims to stop one app detecting a list of other installed apps. - It can often help stop your banking app(s) from...
forum.xda-developers.com

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alecxs said:
if hardware-level key attestation is enforced, there is nothing you can do to hide the unlock state.
Magisk may no longer be able to hide bootloader unlocking from apps
The developer of Magisk has discovered that Google may have started using hardware checks to determine if a device has been bootloader unlocked.
www.xda-developers.com
you could however try older methods. just make sure you wipe app data and do not start the app before hiding.
Hide My Applist - A Brief Guide
Hide My Applist Guide Hide My Applist is a LSPosed module by Dr-TSNG (nullptr). Often referred to as HMA. In the simplest terms HMA aims to stop one app detecting a list of other installed apps. - It can often help stop your banking app(s) from...
forum.xda-developers.com
Click to expand...
Click to collapse
I don't get it! It used to run perfectly fine on LOS with unlocked bootloader!

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you're running another ROM with another security patch level. and you have updated firmware.