- The last command will ask you to confirm on the device to lock the bootloader.
{% include alerts/warning.html content="The bootloader is lockable in official builds only. The procedure to lock the bootloader will not work on community builds."%}
- Select **LOCK THE BOOTLOADER** with `Volume +` and validate with `Power` button.
{% include alerts/warning.html content="The bootloader is lockable in official builds only. The procedure to lock the bootloader will not work on community builds."%}
{% include alerts/danger.html content="The FP4 comes with an anti-rollback feature. Read the paragraph marked `Caution` in Requirements section of this guide, before proceeding." %}
Once you have completed the above steps and before rebooting you can lock your Bootloader.
{% include alerts/warning.html content="The bootloader is lockable in official builds only. The procedure to lock the bootloader will not work on community builds."%}
{% include alerts/danger.html content="FP5 comes with an anti-rollback feature. Please read the paragraph marked `Caution` in Requirements section of this guide, before you proceed to install /e/OS on FP5." %}
Once you have completed the above steps and before rebooting you can lock your Bootloader.
{% include alerts/warning.html content="The bootloader is lockable in official builds only. The procedure to lock the bootloader will not work on community builds."%}
{% include alerts/danger.html content="axolotl comes with an anti-rollback feature. Please read the paragraph marked `Caution` in Requirements section of this guide, before you proceed to install /e/OS on axolotl." %}
Once you have completed the above steps and before rebooting you can lock your Bootloader.
1. Download the [avb custom key](https://images.ecloud.global/devices/keys/avb_murena_rsa4096.bin)
1. Erase the previous key `fastboot erase avb_custom_key`
1. Flash the new key previously downloaded `fastboot flash avb_custom_key avb_murena_rsa4096.bin`
1. Lock critical partition with the following command
2. Erase the previous key `fastboot erase avb_custom_key`
3. Flash the new key previously downloaded `fastboot flash avb_custom_key avb_murena_rsa4096.bin`
4. Lock critical partition with the following command
-`fastboot flashing lock_critical`
- Approve with <kbd>Volume +</kbd> then <kbd>power</kbd>
1. Reboot your device into bootloader, and plug it to your computer
5. Reboot your device into bootloader, and plug it to your computer
- Power OFF the device.
- Hold `Power` + `Volume Down` button combo simultaneously.
1. Lock the device with the following command
6. Lock the device with the following command
-`fastboot flashing lock`
- Approve with <kbd>Volume +</kbd> then <kbd>power</kbd>
{% include alerts/warning.html content="The bootloader is lockable in official builds only. The procedure to lock the bootloader will not work on community builds."%}