First off, the bootloader isn't part of Android, it's what lets the device boot into Android. Device manufacturers generally want you to stick to the version of Android they preloaded on the device.

It's a simple thing to power off your Android device, but what if there were more options? Check out this Xposed module on our Android customization series.

With L's Android release, the recovery is getting a little bit more useful with two new options: reboot to bootloader and power down.

Xiaomi has confirmed to Android Authority that its HyperOS phones will not receive updates if their bootloader is unlocked. Read on for more!

Linuxium Bootloader is a GRUB -like tool that can check for available software and give you a set of appropriate options every time you boot a device like the Rikomagic MK802 IV or Tronsmart T428.

If you upgrade a device to Android P DP2 via the OTA, you don't need to unlock your bootloader. Leave it locked, and your phone will pass the SafetyNet check on Android P.