The issue is that when I root my j500m with magisk via twrp, if it is root, but what happens is that magisk disables me from unlocking oem and does not allow me to activate it, because this will be this and if there is any way to activate the unlock oem without uninstalling magisk or removing the root.
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Warning: This guide recommends the user to backup their data as this process includes an automated wipe
Hello XDA,
I'm suggesting this Tutorial for anyone aware of another person flashing a system on the phone, and I do not recommend it for TWRP users,
unlock bootloader using "fastboot flashing unlock"
do not run the fastboot critical unlock command if you did then relock it,
when you use your phone without magisk installed you won't be able to edit the OEM unlocking option from developer options.
when you install magisk the option OEM unlocking in developer options can be edited and switched off
switch off OEM unlocking option in dev options as long as long as you didn't unlock critical in the bootloader.
while the "critical partition is locked" this will not allow you to flash a full system from google website
only use OTA using recovery when you update
make sure you enable OEM unlocking option in dev option when you make internal partition changes
this method may be a wall against a full system change from thefts as when someone tries to flash a message will pop saying failed to update
even if someone tries to unlock the critical partitions using fastboot unlock_critical it will display failed as you disabled the OEM unlocking option from developer options.
if someone tries to factory reset from recovery this should trigger FRP ( factory reset protection) which will ask about the google account used before that factory reset.
I hope this somehow protects unlocked bootloader phones from any external changes without vulnerabilities or exploits,
Cheers. :fingers-crossed:
Hi,
I've tried all the following steps in the video and I got the error "flashing lock is not allowed". I've already flashed stock rom and recovery and wiped the phone so it's as stock as it gets yet I still get the same error when I enter "fastboot oem lock". Please help ASAP!!!! I'm trying to update to Android 8.0 but the update keeps failing because my bootloader is unlocked
Thanks in advanced.
https://forum.xda-developers.com/oneplus-5/how-to/lock-oneplus-5-bootloader-guide-t3651819
Go to developer settings.. check the oem unlock option. If it's off, bootloader won't relock. You need to turn it on. If it's greyed out & can't be turned on, then you need to root your firmware or flash custom rom & turn it on.
When you have this problem, only magisk will help you turn on allow bootloader unlocked when it's grayed out.
So, you have to flash magisk, turn on allow bootloader to be unlocked in devlopper settings, then flash a clean OOS, make sure there's no modification like custom recovery or root, then relock your bootloader.
Good luck!
use command "fastboot flashing lock" instead of "fastboot oem lock", this will lock your bootloader
hope this tutorial will help you....!!! https://www.youtube.com/watch?v=CQYCSdDUdAU
I had the same problem and solved using magistik, reenable unlock volta loader and After relock.
Dear guys, I don't like the warning boot screen after unlock bootloader but still want to root my Mate 9. So I need to know, is there any problem if I unlock bootloader, then install Magisk with fastboot (without TWRP), then I relock bootloader? Are there anyone tried?
Hello there,
I'm using Gcam with locked bootloader ( From a XDA thread ) . I was thinking to unlock the bootloader from command prompt - #Fastboot oem unlock. Then boot into Twrp , install such apps like radio, Dolby atmos, etc . After that Can I just lock the bootloader using- #fastboot oem lock ??? If not then please tell me process to apply my concept and after applying get back into the factory bootloader locked mode.
Note: I don't want to root my device, I want to install missing apps as like gcam method ( without rooting and restored locked bootloader)
Thanks in advance.
No, you can't. Those apps add files in system partition and you will get a bootloop if you lock the bootloader
You can install those apps without unlock bootloader only with root and magisk modules, for example
https://forum.xda-developers.com/apps/magisk/magisk-dolby-atmos-r6-5-t3554616
I tried to root my c9000 but I had bootloop everytime when I flash something via twrp and I realized there is no OEM unlock in developer options. How can I find it abd root oreo ?
Removed, Enable it on N then update to O
Follow those steps