Can’t manage the bootloader to unlock
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Hi,
I try to install Ubuntu Touch on my new FairPhone.
On this page https://devices.ubuntu-touch.io/device/fp4/ it says “Your device must be running the Fairphone OS version of Android 11”. My version of Android is 13 since today’s first power on and update.
So I tried to follow https://support.fairphone.com/hc/en-us/articles/18896094650513-Install-Fairphone-OS-manually to install Android 11.
Followed " Flashing with fastboot" because it “Can be used to downgrade to an older version (for example: Android 13 → Android 11).”
Following this steps, when I type adb devices, nothing appears on the phone but it’s listed in listed devices attached on command prompt.
When I type adb reboot bootloader, the phone restarts on a screen FastBoot mode with “device state - locked” with 4 choices above : START/Restart bootloader/Recovery mode/Power off.
If I type fastboot flashing unlock : waiting for any device.
I don’t understand if I am on the expected boot screen and need some help.
Fairphone 4.
Thanks ! -
@kevin-lhotellier
You need a code to unlock Fairphone bootloader that only Fairphone can give you.
https://www.fairphone.com/en/bootloader-unlocking-code-for-fairphone/And follow their process to unlock its bootloader (from step 2).
https://support.fairphone.com/hc/en-us/articles/10492476238865-Manage-the-BootloaderAlso be care that Fairphone 4 don't have the anti rollback protection like the FP5 has before downgrading it, or you could brick.
And if you succeed installing UT on it DON'T RELOCK THE BOOTLOADER, or it's a brick.
