Install /e/ on a Fairphone FP3 - “FP3”

Very important: please read the following carefully before proceeding!

Installing a new operating system on a mobile device can potentially:

  1. lead to all data destruction on the device
  2. make it an unrecoverable brick.

So please only flash your device if you know what you are doing and are OK with taking the associated risk.

The /e/ project and its project members deny any and all responsibility about the consequences of using /e/ software and/or /e/ services.

Tip: If you find an issue with this installation document or to suggest any improvements , Please add your suggestions to this topic on our community forum


  1. Highly recommended: it is recommended that you have an /e/ account (like: if you want to benefit from /e/ account integration for all online services such as: email, drive, calendar, notes, tasks. Register for your free /e/ account.
  2. Make sure your computer has working adb and fastboot. Setup instructions can be found here.

    Please ensure you follow the instructions for adb and Fastboot setup exactly as given in the previous step to avoid unexpected issues during device setup.

  3. Enable USB debugging on your device.
  4. Please read through the instructions at least once completely before actually following them to avoid any problems because you missed something!
Caution: Please note this build is for the original FP3 under Android 9 (Pie) only. The FP3+ and its new camera modules are not supported on /e/OS yet. If you have upgraded your FP3 to the new Android 10 stock OS please do not flash this build.

Unlock the bootloader

  • Allow the bootloader unlocking by following the official FP3 unlock documentation
  • Reboot the device on fastboot mode by running adb reboot bootloader (or press Power + Volume - if your device is off)
  • Once on fastboot mode, unlock the device by running fastboot flashing unlock

    On previous versions of fastboot, the command is fastboot oem unlock

  • The device will ask you to confirm the unlocking. Confirm by selecting UNLOCK THE BOOTLOADER and confirm with Power
  • The device reboot automatically. It will show a warning. Press Volume + or Volume - to display boot options, select fastboot and confirm with Power to reboot on fastboot

Download /e/ for FP3

Installing /e/ from the bootloader

  1. Unzip the archive

     unzip <zip>
  2. Install /e/ using the following commands (from fastboot mode)

     fastboot -w
     fastboot flash system system.img
     fastboot flash boot boot.img
     fastboot flash vendor vendor.img
     fastboot flash dtbo dtbo.img
     fastboot flash product product.img
     fastboot flash vbmeta vbmeta.img
     fastboot flashing lock

    The last command will ask you to confirm on the device to lock the bootloader. Select LOCK THE BOOTLOADER with Volume + and valid with Power.

    On previous version of fastboot, the last command is fastboot oem lock

  3. Enjoy! The device reboot automatically on /e/.

Getting a fastboot error ?

  • On some versions of fastboot you may get an error while running the Fastboot flash boot boot.img command

  • The below error may show up on the console

    Fastboot error: couldn’t parse partition size ‘0x’

  • A workaround for this error is as under. Run this command on the console:
      Fastboot getvar current-slot
  • This would show the current active slot. For e.g. if it shows a , run the below command
      Fastboot --set-active=b
      Fastboot flash boot_b boot.img
Tip: If you find an issue with this installation document or if you want to suggest improvements, Please create a dedicated thread on our community forum
Success: Congratulations !! Your phone should now be booting into /e/OS !!
To find some troubleshooting tips… click here

adb related errors

  • Getting a Total xFer ':' 0.01x message - Upload the /e/OS to internal storage and retry to install
  • adb ':' sideload connection failed ':' insufficient permissions for device error - Execute the commands adb kill-server and adb start-server and retry

Still need help to complete the installation ?

Check out these guides: [HOW-TO] Flash /e/-OS on Fairphone 3 using Debian based GNU/Linux