The "HDMI - USB Type-C (3 m, HDMI, USB Type-C)" cable from equip only works with smartphones that support DisplayPort Alternate Mode (DP Alt Mode) via their USB-C port.
### Compatible smartphones: - The cable is compatible with smartphones that have USB 3.1 Type C or Thunderbolt 3 ports with DP Alt Mode, such as some models from Samsung (e.g. Galaxy S20/S10/S9), Huawei (e.g. Mate20, P20, P30) and other devices that support this technology.
### Non-compatible smartphones: - The Fairphone 4 supports DisplayPort, but it is unclear whether it also supports HDMI Alternate Mode via USB-C. It might be necessary to use an active adapter to convert it to an HDMI signal. - Smartphones with Lightning ports, such as the iPhone 11 or XR, are not compatible as they have a different type of connector.
To ensure that the cable works with your Fairphone 4, you should check the specifications of your device and contact the manufacturer if necessary.