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Can we lock the bootloader again after installing custom ROM?
There is no way you can boot a non stock kernel on a locked bootloader. If you can, then your bootloader is not locked and you can flash whatever you want. See if you can get to fastboot on your locked bootloader.
Does flashing stock ROM locks bootloader?
If you flash factory image via fast boot you will lose root and custom kernel. Boot loader will stay open until you lock it again using toolkit or from factory image command via fast boot.
Should I lock my bootloader?
Just keep your bootloader unlocked. Locking it again could cause a lot more issues than needed and even make it impossible to unlock it again if ever needed…
How to re-lock Google Nexus 4 bootloader?
In case you want to re-lock the Nexus 4 bootloader follow the steps below: Repeat the entire tutorial until you reach step 6. Enter ‘fastboot oem lock’ instead of the ‘fastboot oem unlock’ command. The phone will restart and it will boot with a locked bootloader.
Why does my Android phone have a locked bootloader?
Locked bootloaders are the bane of customization on Android. They prevent you from installing a custom OS on your device. Any attempt to install a custom ROM with a locked bootloader is an easy way to get your device bricked.
Is it possible to re-lock bootloader on custom ROM?
Honestly just steal the finger together with the phone instead of freezing stuff and messing around. It is quickly done and and 95% of people will have the finger print sensor configured to bypass the lockscreen. I read a few papers on the weak points to android’s encryption scheme.
Is there a way to unlock the bootloader without Fastboot?
On a rooted device, you can use BootUnlocker to re-lock the bootloader without using fastboot. You can also use it to unlock the bootloader again without wiping data. I use it to keep my bootloader locked most of the time, but unlock it prior to installing a system update or doing anything else…