Hello again! I have a problem, i have the original firmware and the tool to flash it in case anything goes wrong (MTK Client), so i unlocked the bootloader, the problem is that when you unlock the bootloader, the baseband says (020null) and imei is unknown. I tried to restore my own nvcfg, nvram and nvdata to no luck, when I lock the bootloader, they appear again without flashing anything. So there must be something in the system that checks if you have the bootloader locked or not... I want to know how to disable it because I want to have root (I have rooted it with no issues, but i want my imei you know), i thought init.rc may have something to do with it, here is it (https://gist.github.com/ThePinkLyna/a43e65572896a57af2624610f74d00f2).
By the way my phone is an Alcatel 5007G, MTK 6762. Any ideas in where could be the block? The bootloader? An script in the system? There must be a way, right?
Re-lock the bootloader.
Android can get rooted without having the bootloader got unlocked before.
It's the Android kernel that checks if bootloader is locked or not.
xXx yYy said:
Re-lock the bootloader.
Android can get rooted without having the bootloader got unlocked before.
It's the Android kernel that checks if bootloader is locked or not.
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Click to collapse
How to get root without unlocking the bootloader? Because if i patch boot.img to use with magisk, then it goes into red state because secure boot. I know, the last thing you said, but i was talking about the system, there must be something which checks if the bootloader is unlocked or not and if its unlocked then it blocks the imei, i doubt android does that by default.
well, not answer to your original question, however try bootless-root method. but read warnings about limitations on locked bootloader (do not modify boot, system, ...)
TheAndrew579 said:
How to get root without unlocking the bootloader? Because if i patch boot.img to use with magisk, then it goes into red state because secure boot. I know, the last thing you said, but i was talking about the system, there must be something which checks if the bootloader is unlocked or not and if its unlocked then it blocks the imei, i doubt android does that by default.
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You can doubt all, it's on you. Also take note that
1. every Android device comes shipped with a recovery partition by default,
2. you can't use a Custom Recovery like TWRP to restore lost IMEI.
are you sure it's bootloader lock state and not Magisk? I have same issue with Redmi 6, when booted in Magisk from fastboot baseband is unknown. normal boot baseband reappear (nothing flashed)
my suspect is magisk mount overlay (have to dig more into)
https://github.com/topjohnwu/Magisk/issues/426
What Magisk version you tried?
xXx yYy > /dev/null
aIecxs said:
are you sure it's bootloader lock state and not Magisk? I have same issue with Redmi 6, when booted in Magisk from fastboot baseband is unknown. normal boot baseband reappear (nothing flashed)
my suspect is magisk mount overlay (have to dig more into)
https://github.com/topjohnwu/Magisk/issues/426
What Magisk version you tried?
xXx yYy > /dev/null
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Its not Magisk, because the problem starts happening when i unlock the bootloader, when i unlock it (Without installing magisk or flashing anything), and androids appears again, i go to info and it says baseband = 020null and imei unknown, if i flash magisk, then i get root but still no imei.
Im talking about the original firmware, unlocked bootloader = no imei, when i lock it again after uninstalling magisk (By flashing the original boot.img) then the imei appears again.
aIecxs said:
well, not answer to your original question, however try bootless-root method. but read warnings about limitations on locked bootloader (do not modify boot, system, ...)
Click to expand...
Click to collapse
And my android security version is newer, so that method wont work, still, i want root so i can uninstall system apps, so an unlocked bootloader is a must, but how exactly if when i unlock it i lose the imei? Thats the problem
you don't need root to get rid of system apps. this will do it. be careful what you're doing, in case of bootloop the only way left is factory reset. do a backup before.
Code:
adb shell cmd package disable --user 0 <pkgname>
How to disable any pre-installed system app bloatware on Android without root
If you hate the bloatware or pre-installed apps on your Android smartphone, here's how to disable them even if Android doesn't normally let you.
www.xda-developers.com
Related
I really hate that boot screen that makes you think your phone is going to blow up because the bootloader is unlocked... I realize that having it unlocked is perfectly fine, and with Magisk, all the Google security stuff still works just fine.. I also know that an unlocked booloader makes it much easier to flash updates (flash-all but remove the -w) ... So please don't try to explain why I should leave my bootloader unlocked.
WIth my HTC phones, unlocking the bootloader would erase the phone (obviously, and just like the Pixel 2). Locking the bootloader wouldn't erase the phone on the HTC, but with the Pixel 2, the instructions say that it WILL ERASE THE PHONE.
With the HTC, the wipe happened in recovery, so if I had TWRP installed, the phone wouldn't erase... I could easily switch between locked and unlocked, and as long as I had TWRP installed, the phone would "think" it was going to erase, but I stopped it.
So my question is... Does the Pixel 2 wipe the phone on lock/unlock through recovery? If so, can I lock the phone with TWRP installed in recovery and prevent that lock? I know I can make a backup and try it and see, but since the Feb update, getting into a decrypted recovery has become a pain (remove pin/password, reboot, reboot to recovery, do what you want, reboot to system, add the pin/password, add fingerprint, open EVERY SINGLE APP THAT USES FINGERPRINT AND SET LOGIN AND REGISTER THE FINGERPRINT - it frustrates me, in case you can't tell).
You cannot flash TWRP unless you are unlocked so at this time there is no way to unlock the bootloader without a full wipe.
I think you misunderstood the question. I have unlocked the bootloader (let it wipe) and installed TWRP. I want to know if the re-lock will wipe through recovery (and therefore be stopped by TWRP) or if it does the wipe using some other method (and therefore wiping regardless).
1. You won't be able to maintain your userdata while switching between locked and unlocked states.
2. You will likely not be able to boot your device either after locking your phone.
For 1)
The Pixel 2 enables FBE (filesystem-based encryption) by default for your userdata partition. The encryption keys are derived from a hardware secret (accessible only from TrustZone), the RSA public key that was used to sign the boot image and a flag (whether it is locked or unlocked). The latter parameters are provided by the bootloader (lk) to the Keymaster trustlet (running in TrustZone).
If any of these parameters change, then the encryption keys will change as well. As a result, your files will remain inaccessible even if you were hypothetically able to flip the lock state.
For 2)
Unlocking the bootloader (fastboot flashing unlock) will disable verification of the boot image. TWRP is installed by modifying the boot image (in both the "a" and "b" slots) which invalidates the Verified Boot signature that covers this boot image (stored in the vbmeta partition). When the device is locked again, the bootloader will fail to pass the signature check and stay in the "red" boot state. At that point I guess you have a brick (I have not tried this myself for obvious reasons).
Source: reading the lk source code and various Android documentation such as https://source.android.com/security/encryption/file-based
Lekensteyn said:
When the device is locked again, the bootloader will fail to pass the signature check and stay in the "red" boot state. At that point I guess you have a brick (I have not tried this myself for obvious reasons).
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The signature of the Custom ROM (Official LineageOS) can be integrated into the bootloader before re-locking the bootloader.
But this is the problem: "Lineage Recovery is also built in userdebug mode, that's a problem. When Lineage recovery is built this way, it allows any package, signed or unsigned, to be installed on your phone. This effectively negates the benefits of locking the bootloader. [...] In fact most custom ROMs simply use TWRP or another third party recovery which has the same issues as they are designed to never even look at the signatures of the packages they are flashing to your device."
"A discussion about bootloader locking/unlocking... AKA I want to relock my bootloader, should I?: LineageOS"
https://www.reddit.com/r/LineageOS/comments/n7yo7u
I was wondering if there is a way to disable the warning screen or relock the bootloader while keeping the root and recovery.
Everytime i try it it say it can no longer find a valid operating system.
plain and simple, not there is no way for our phones. if your bootloader is unlocked, the warning screen will always show and your bootloader must be unlocked in order for magisk to run and root to be allowed.
Currently no. The reason is that to have root, you have to have a patched boot image, and to have a patched boot image, you need to be able to have an unlocked bootloader to allow flashing of /boot from recovery. "Locked" rooting would involve an exploit that would undoubtedly get fixed quickly. Also, keep in mind that the Pixel 2/XL do not have dedicated recovery partitions, but that recovery itself also resides in /boot.
As title said: I have an 1+8 device and unlocked bootloader lock,but I am wanna to keep my magisk models and re-lock it. I also flashed twrp and edxposed. could I re-lock using custom vbmeta partition? or modify my aboot to remove boot verify. If I directly use "fastboot oem lock" ,it says a letter said my device are occoupt? or sth,in red. could these methods jailbrake google's boot verify ,disable ignore these red letter ,directly boot hydragon os or oxygen os? thanks
Markpeng0315 said:
As title said: I have an 1+8 device and unlocked bootloader lock,but I am wanna to keep my magisk models and re-lock it. I also flashed twrp and edxposed. could I re-lock using custom vbmeta partition? or modify my aboot to remove boot verify. If I directly use "fastboot oem lock" ,it says a letter said my device are occoupt? or sth,in red. could these methods jailbrake google's boot verify ,disable ignore these red letter ,directly boot hydragon os or oxygen os? thanks
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Click to collapse
You can't have a locked bootloader with any changes to system like that or verified boot will not let it boot up, as you've seen and there's really no way around that
If you change aboot, it still won't boot
if i modify vbmeta partion and compeletely changed verification files? is it possible? or could i flash a boot file modified from Android older version to skip this limit. thanks
Not possible, but I do not understand why you would even worry about un rooting. I see no possible reason why you would even risk bricking your device!
But if it means so much to you go ahead, and then you will know why.
I recommend against it, you will basically have a paperweight. When you relock the system checks for a signature, if it is not found, then the phone won't boot. Or something like that.
Markpeng0315 said:
As title said: I have an 1+8 device and unlocked bootloader lock,but I am wanna to keep my magisk models and re-lock it. I also flashed twrp and edxposed. could I re-lock using custom vbmeta partition? or modify my aboot to remove boot verify. If I directly use "fastboot oem lock" ,it says a letter said my device are occoupt? or sth,in red. could these methods jailbrake google's boot verify ,disable ignore these red letter ,directly boot hydragon os or oxygen os? thanks
Click to expand...
Click to collapse
Sounds like you want to modify the boot.img and create a sub partition to force boot a custom firmware? If that's the case then you seem to know about coding or at least modifying firmware. So why don't you just download OnePlus 8 firmware, create a virtual SDK and play around with the new Android 10 firmware. Because even if you did these modification on other phones it stands to reason that they were on older Android builds. This will keep your phone safe and give you the opportunity to test your theory. Happy modding!
Hi guys and girls,
I bought a oneplus 7 pro recently and wanted to unlock the bootloader and root it to install the xXx Nolimits mod except I made some errors (I believe I removed too much bloatware with the .profile file, my WIFI and my mobile data were no longer working), so I re-lock the bootloader except that I got this error message: "Your Device is corrupt. It can't be trusted and will not boot", I was scared for a moment but I managed to access the fastboot and re-unlock the bootloader this time to remove everything that was not there in the stock phone and re-lock the bootloader.
I did all the checks after re-locking my bootloader (root check, safety net check, sensor check, Widevine check and stock recovery check) and absolutely no problem, everything is in order.
My question is: is it possible that something has been changed in the low level of android? (I just install TWRP with fastboot, flash Magisk with TWRP and finally flash the xXx nolimits mod).
Thanks for your help !
Is it possible to lock the bootloader with TWRP and a custom ROM installed and still use the device? Can I still flash ROMs in TWRP without hard/soft bricking my POCO?
Ungeskriptet said:
Is it possible to lock the bootloader with TWRP and a custom ROM installed and still us the device? Can I still flash ROMs in TWRP without hard/soft bricking my POCO?
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Click to collapse
Short Answer: No it's not feasible to do that, reason behind that is AVB 2.0 (Android Verified Boot). It checkes for a pre-existing hash of all paritions signed by the OEM key (in this case Xiaomi), If there are conflicts found and Bootloader is in Locked state, The result would be a Fatal Error and would skip booting The OS to go to repair mode (aka EDL mode), which you can access in Xiaomi devices only if you have a verified EDL account.
Besides, even if you modify the Bootloader Binery or signed the twrp.img with the oem key (which you don't have access to), you wouldn't be able to flash anything anyway, since the device would consider any modifications after that a fatal error as well and won't boot.
Long Answer: read up on the follwing topics:
1- Android verified boot https://android.googlesource.com/platform/external/avb/+/master/README.md
2- FROST attack on unlocked bootloader (The reason android implemented avb) https://www.cs1.tf.fau.de/research/system-security-group/frost/