The hands-free car kit basically works with the Nokia 225 4G, as the device supports 4G and Bluetooth, which is a prerequisite for many hands-free car kits. However, there are reports that there may be limitations with certain models or systems. Official instructions recommend that the phone should only be installed in the vehicle by authorised personnel and that the vehicle or accessory manufacturer should be consulted in the event of problems.

A separate Bluetooth hands-free kit compatible with Nokia phones can also be used to make hands-free calls.

To summarise: A hands-free car kit can work with the Nokia 225 4G, but it depends on the vehicle and hands-free kit. If you are unsure, you should check compatibility with the vehicle manufacturer or hands-free system provider.