Lock BL on phone with TWRP and/or root - X Style (Pure) Q&A, Help & Troubleshooting

Hi,
coming from nexus world, I discovered that my usual workflow doesn't work. On Nexus I would lock the bootloader after any software update for extra security and unlock it before more updates via BootUnlocker app. Now loosing the ability to unlock the BL without wipe is not that big a deal since I am proficient with TitaniumBackup, so it's just an extra step setting it all up after any updated.
But, I'm surprised that the fastboot will not allow locking the BL with modified software.
Is there a known method to do this?
Thanks.

Related

Bootloader unlock without losing data, is it possible?

I am already unlocked and rooted, but I would like to relock the bootloader assuming that I can unlock it for future updates without losing data. The Nexus 5 had a boot locker app in the App Store which allowed this, but I do not find an option for the 6 P. I'm thinking it may not be possible but thought I would ask. Thank you in advance
Sent from my Nexus 6P using Tapatalk
funnel71 said:
I am already unlocked and rooted, but I would like to relock the bootloader assuming that I can unlock it for future updates without losing data. The Nexus 5 had a boot locker app in the App Store which allowed this, but I do not find an option for the 6 P. I'm thinking it may not be possible but thought I would ask. Thank you in advance
Sent from my Nexus 6P using Tapatalk
Click to expand...
Click to collapse
No, you can't unlock the bootloader without wiping the device, it's a security feature. I'd advise keeping the bootloader unlocked anyway, if you somehow end up in a boot loop and need to flash the factory images to get the phone booting again you'll be forced to unlock the bootloader. This will wipe the device and you'll have no way to back up your data first. This may seem like an unlikely scenario but it happens more than you'd realise, sometimes randomly, sometimes because an OTA failed for whatever reason. Sure, you don't have the extra security of a locked bootloader but if you actually take care of your device this is a non-issue.
Heisenber said it best
Boot Loader Unlock without lossing data
I want to root the device but bootloader is locked .
the reason i si want to recover my lost chat messages which requires root from KIK messenger,
If i unlock the boot loader ,then it will wipe off the device .
How then i can get back the chat of KIK messenger ,?? any help
umer272 said:
I want to root the device but bootloader is locked .
the reason i si want to recover my lost chat messages which requires root from KIK messenger,
If i unlock the boot loader ,then it will wipe off the device .
How then i can get back the chat of KIK messenger ,?? any help
Click to expand...
Click to collapse
Only thing I can think of is waiting for a hack based root for mm or n and using that to temporarily gain root. Otherwise, just take a bunch of screenshots of prior chats then live with not being able to scroll up and immediately view them.
umer272 said:
I want to root the device but bootloader is locked .
the reason i si want to recover my lost chat messages which requires root from KIK messenger,
If i unlock the boot loader ,then it will wipe off the device .
How then i can get back the chat of KIK messenger ,?? any help
Click to expand...
Click to collapse
I don't know specifically about Kik, but you might explore Helium backup. In some situations it can back up apps and app data without root. (By activating the backup using a physical connection to your desktop computer.). Good luck!
The appa should be backed up if you turn that feature on in your Google settings.
You can back up most data with ADB.
Nobody is investing time in root without an unlocked bootloader.
It just doesn't make sense.
Don't lock the bootloader. You can get stuck in an infinite bootloop. If you want to get OTA updates download official firmware for your phone, flash AP, CP, BL and for CSC use HOME file. If you use HOME you won't lose the data, you will lose root but you can get OTA updates!

[PSA] Read before relocking your bootloader

I'm not sure what is up, this isn't a new thing, but people keep coming to me (1-2 a day) with this issue.
If your phone isn't stock, DO NOT RELOCK your bootloader. You will 'soft brick' it, and at this time there is no easy route to fixing it.
If you are on EE UK, Verizon or another carrier blocking bootloader unlocks, and you used dePixel8 to unlock it, DO NOT relock your bootloader unless you are sure you don't want it unlocked again.
Finally, dePixel8 is UNSUPPORTED. Don't come to me if you can't get it to work, don't come to me if you used it them messed up your phone by flashing something bad or whatever. Its on you.
Great announcement. With the monthly security update out today, it is recommended that you don't install the update or have automatic updates enabled.

Relock Bootloader permanently

I flashed March Update with MiFlash Clean all and Lock but I'm able to unlock the bootloader again with the developer settings disabled, that is a big security risk because someone with physical access to the device will be able to unlock the bootloader without permission and maybe decrypt personal data.
I have also noticed similar behavior recently. Great that issue is not specific to me only. Bad it exists.

Re-Lock Bootloader on Galaxy Tab A T510?

Does anyone know if it is possible to re-lock the bootloader on the Galaxy Tab A T510? If so, would I begin with flashing back to stock firmware then disabling OEM unlock in developer options or following different steps? I certainly want to avoid bricking the device. I've searched for a solution but can't seem to find anything. Thanks!
dlehmanusa said:
Does anyone know if it is possible to re-lock the bootloader on the Galaxy Tab A T510? If so, would I begin with flashing back to stock firmware then disabling OEM unlock in developer options or following different steps? I certainly want to avoid bricking the device. I've searched for a solution but can't seem to find anything. Thanks!
Click to expand...
Click to collapse
You need to download the latest stock firmware either from Samsung or Sammobile and use Odin to flash it. DO NOT DISABLE OEM!!!! That has nothing to do with locking the bootloader. Flashing the stock ROM will do that. The OEM enable only disables the FRP lock which makes you login with the same google account used BEFORE a factory reset. If you are sure you know that account login and password, the FRP lock isn't a problem.
edit: The problem with the FRP lock is that people will often create a new google account login and password when first setting up their tablet. And because you only have to do that once, they tend to forget one or the other. Then, if they do a factory reset without the OEM enabled, they are locked out of the tablet.
Thanks for the detailed information and clarification. Your help is much appreciated!
The T510 doesn't have a locked bootloader.
ashyx said:
The T510 doesn't have a locked bootloader.
Click to expand...
Click to collapse
No, but it does "lock" the tablet from getting OTA updates.
I have reflashed the stock firmware however I'm still receiving the following message during boot..."The bootloader is unlocked and the software on this device cannot be verified". Is there a way to remove this message? I am planning to return the device and I want to reset everything. Thanks!

Google Unlocked Pixel 3a on Verizon

Hi all. I have been searching high and low for information on this specific question:
Will activating an unlocked Pixel 3a on Verizon disable the OEM Unlock and bootloader unlock capability?
I got a Verizon variant before I realized that there was not way to unlock the bootloader. Bummer. So, I returned it for an Unlocked version from Google, which I just received tonight. I breezed through the setup (without the SIM card) and noticed that OEM Unlock was disabled stating I needed to connect to the internet. So, I enabled WiFi and the OEM Unlock was then available. It would seem that I an now able to follow the unlocking procedure.
My goal is to unlock the bootloader and root, but do I have to do it immediately? My concern is that activating the phone with my Verizon SIM could:
1) Prevent unlocking the bootloader in the future if I don't unlock it before I activate with SIM (research seems to indicate that factory resets will undo disabling OEM Unlock if this can happen if I understand correctly)
2) Re-lock an unlocked bootloader - maybe this is not even possible?
I don't want to mess this up. All the info I am finding are discussions related to trying to unlock a Verizon variant and I cannot find good info on what happens to bootloader unlocking options on unlocked phones that are activated on Verizon. The only reason I may want to delay this process is because I dont have a lot of time at the moment and would rather not rush the bootloader unlock and root process. However, my HTC 10 is in bad shape and need a phone to get through the holidays. I was hoping that I could activate it on Verizon now, use it with its locked bootloader for a few weeks, and when things cool down after the holidays, implement the bootloader unlock and root.
If that is not advisable, what about unlocking the bootloader immediately (doesn't seem too hard and I have used ADB before), and activating without root. Then root later? Any possibility of concern #2?
Can OTA's re-lock a bootloader and prevent future unlocking?
I appreciate anyone's incite, experience, or links to the needed information for clearing this up. Thanks you!
I would advise you to unlock the bootloader asap. If you wait it will be a pain later because unlocking causes loss of data. If you don't care about that, wait as long as you like.
As far as Verizon is concerned, if the phone is unlocked, I don't see how they could possibly lock the bootloader. They may restrict your services but they can't touch the lock status of a device you purchased.
Sent from my Pixel 3a using Tapatalk

Categories

Resources