After using iOS for a couple of years, I finally took the plunge and purchased a Pixel 6 Pro in order to test and use [GrapheneOS] (https://grapheneos.org).
The installation process was rather quick once you have the tools and files you need. Overall, it can be done in just a few minutes.
Gathering Tools & Files
First, in order to interact with the device, we will need the Android platform tools. Find the Linux download and save the ZIP folder to your preferred location.
Once we've downloaded the files, we will need to unzip them, enter the
directory, and move the necessary executables to a central location,
/usr/bin/. For this installation, we only need the
Next, we need the GrapheneOS files
for our device and model. For example, the Pixel 6 Pro is codenamed
raven on the release page.
Once we have the links, let's download them to our working directory:
In order to validate the integrity of the downloaded files, we will need the
signifypackage and Graphene's
Then we can validate the files and ensure that no data was corrupted or modified before it was saved to our device.
Once the files are verified, we can unzip the Graphene image and enter the directory:
Enable Developer Debugging & OEM Unlock
Before we can actually flash anything to the phone, we will need to enable OEM Unlocking, as well as either USB Debugging or Wireless Debugging, depending on which method we will be using.
To start, enable developer mode by going to
About and tapping
Build Number seven (7)
times. You may need to enter your PIN to enable this mode.
Once developer mode is enabled, go to
Devloper Options and enable OEM
Unlocking, as well as USB or Wireless Debugging. In my case, I chose USB
Debugging and performed all actions via USB cable.
Once these options are enabled, plug the phone into the computer and execute the following command:
If an unauthorized error occurs, make sure the USB mode on the phone is changed from charging to something like "File Transfer" or "PTP." You can find the USB mode in the notification tray.
Once we have found the device via
adb, we can either boot
into the bootloader interface by holding the volume down button while
the phone reboots or by executing the following command:
Unlock the Bootloader
The phone will reboot and load the bootloader screen upon startup. At this point, we are ready to start the actual flashing of GrapheneOS onto the device.
NOTE: In my situation, I needed to use
sudo with every
fastboot command, but not with
adb commands. I
am not sure if this is standard or a Fedora quirk, but I'm documenting
my commands verbatim in this post.
First, we start by unlocking the bootloader so that we can load other ROMs:
Flashing Factory Images
Once the phone is unlocked, we can flash it with the
flash-all.sh script found inside the
raven-factory-2022091400 folder we entered earlier:
This process should take a few minutes and will print informational messages as things progress. Avoid doing anything on the phone while this process is operating.
Lock the Bootloader
If everything was successful, the phone should reboot a few times and finally land back on the bootloader screen. At this point, we can re-lock the bootloader to enable full verified boot and protect the device from unwanted flashing or erasure of data.
Once done, the device will be wiped and ready for a fresh set-up!