Install fastboot drivers

FP4

Solution 1: Using Windows update

1. Start with your phone in Fastboot mode (turn it off then keep pressing Power + Volume down until it start in fastboot mode)

2. Connect your phone with the PC

3. Go to Windows Update
   • Click on the Start menu in the lower left corner.
   • Click on Settings
   • Go to Update and Security

   

4. Install the necessary driver. Windows should detect the required drivers for your device.
   • Click on Search for updates

   

5. A new section named Show optional updates should appear. Click on it.

   

6. Click on Driver updates to display the list.

   

7. Select the driver named Google, Inc. - Other hardware - Android Bootloader Interface and click on Download and install.

source from community forum

If the previous solution does not work, you can try this one:

Solution 2: Manual installation of fastboot driver for FP4

1. Download the driver. Unfortunately, Fairphone does not provide an official “fastboot interface driver”.
2. Start your phone in Fastboot mode (turn it off then keep pressing Power + Volume down until it start in fastboot mode)
3. Plug your phone to your windows computer
4. Open device manager from windows settings
5. Select the android device with the warning icon
6. Right click to open details of the device
7. Move to Driver section, and select install/update driver
8. A message prompt will open. Choose to use local file
9. Select the folder where you downloaded the driver
10. Wait for the driver to install