First, complete all the steps from the article Fairphone 4 OS manual installation.

Prerequisites

1. Windows 10.
2. Your computer needs to have a working internet connection.
3. Your system drivers need to be up to date.
   To make sure of this, in your Windows 10:
   1. Click the Start menu, type Device Manager, then press the Enter key on your keyboard. A new window will open.
   2. Scroll down the list and select Other Devices. Please follow the next steps if you see an item named simply Android, preceded by an escalation dot.
   3. Click the Start menu, type Check for updates, then type the Enter key on your keyboard. A new window will open.
   4. Click on the button Check for updates located in the top right part of this window and wait for a couple of minutes. Below the button, you will now see View optional updates.
   5. Click on View optional updates.
   6. Click on Driver and updates.
   7. Scroll down the list if needed and select all the drivers starting with Google, Inc -...
   8. Click on the button Download and install.
   9. Once done, reboot your computer.
4. The connection should now work.
   
   Please, check the animation below for additional help.
   

Process

1. Connect the Fairphone 4 (in Fastboot mode) to your computer using a USB-C certified data cable.
   • If Fairphone 4 does not connect, try installing the latest Google USB driver (ZIP). For instructions for how to install the driver, click here.
2. Locate the archive you downloaded in the previous step, (usually in the Downloads folder).
   Using Chrome Browser:
   1. Press simultaneously the keys Ctrl + J. A new tab called Downloads will open.
   2. Look for the last download, the name starts with FP4. Click on the text Show in folder.
      
      A new Windows Explorer instance will open.
3. Extract the archive.
   
   1. Double-click on the archive you downloaded, the name starts with FP4.
   2. Click on the Extract button to extract the file. Wait for the operation to be completed. A new Windows Explorer instance will open
   3. Double-click on the folder that just appeared, the name starts with FP4., to enter it
4. Once you are inside the folder, locate the file flash_fp4_factory.bat and double-click on it
   • If a warning from User Account Control pops up, click on Yes.
5. The following warning will appear:
   
   Type in Yes and press the Enter ↩ key.
   
6. The script will now run for a couple of minutes like in the following picture:
   
   Once done, you will see the following text:
   
   
   -IMPORTANT-
   It can take up to 15 min. Do NOT interrupt the process, it might damage the device!
7. Done, your phone is now up to date. Your phone will now reboot, finishing the system update in a few minutes. You can now safely unplug your Fairphone from your computer.
8. Once done, for safety reasons, we strongly advise you to lock your bootloader again. To do so, follow the instructions in the article Manage the bootloader.

If after reading the article you need more help, contact our Customer Support.