Why should i relock my bootloader

The bootloader starts up the Android operating system when you turn on the phone. Alternatively, the bootloader can start up recovery mode. When a phone is in recovery, it can execute large pieces of code that totally rewrite the Android operating system. The bootloader is important because it loads both of these pieces of software. Without a working bootloader, your phone is a useless brick. Some bootloaders, however, contain an extra layer of security that checks to make sure that it only loads an operating system that passes its approval process.

The exact process of checking for unauthorized software varies from phone to phone, but the effects are the same no matter what. Locking the bootloader is a very serious practice with some serious implications. It can present a challenge to Android developers and enthusiasts who wish to install custom ROMs or change the phone.

Why is it possible to re-lock the bootloader after installing a custom ROM on some devices? Ask Question. Asked 4 months ago. Active 4 months ago. Viewed 1k times. Another hint is this forum post on the Fairphone forums , which reports the following: I relocked the bootloader fastboot flashing lock , it automatically wiped my user data, and booted successfully!

Improve this question. Socob Socob 3 3 silver badges 10 10 bronze badges. May be because some new devices support user-settable root of trust. Details here: Is there a way to root an Android phone without unlocking the bootloader?

IrfanLatif Ah, interesting! Viewed k times. How can I do this? Improve this question. Kebin Liu Kebin Liu 1 1 gold badge 2 2 silver badges 8 8 bronze badges. Add a comment. Active Oldest Votes. Use the following command, depending on your OS.

Improve this answer. Would this process work for other phones or just the Nexus 5 due to it being 'unlockable'? One of Samsung's many modifications has been removing Fastboot and replacing it with Odin. Although some Samsung phones to have minimal Fastboot compatibility. Quick update: for the newer versions of platform-tools, fastboot oem lock does not work. They have changed the command to fastboot flashing lock.

However I connected my device moto g via datacable. AdamHurwitz - Yes, I believe that it will wipe the phone data. Show 3 more comments. EpicSwirly , Jan 16, : don't lock bootloader, I don't think you're going to be flashing random crap on it by accident. Just download your files for the right device and you won't have problems and I don't think you can lock bootloader with twrp still installed but I may be wrong.

Sounds like a bad idea. Tokolozi likes this. Jelly Bean Jan 16, Jeffreyvdv3lde , Jan 16, : 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 Jeffreyvdv3lde , Jan 16, :.

Tokolozi and theapu like this. Gingerbread Jan 16,