I had a HFU-2 installed in my car, but my new phone comes with a
HFU-4. All the plugs seem the same, with the exception of the Phone
connector. On the HFU-2, it is twice as wide as on the HFU-4. However,
the phone connector would fit into the Data/Handset plug - will this
give me the same result?



See More: HFU-2 and HFU-4 (Are they compatible?)