Hack from the past: DIY Nokia DKU-2 cable 

Many years ago, when the Nokia pop-to-port cables were expensive, I have created the following "DKU-2 cable" from an aftermarket headset, some prototyping PCB and an USB B type connector, by melting the pogo like pins to the proper positions:





It was slightly faster with my Nokia 6230 than the Bluetooth, not to mention the iRDA at that time.

Watch out for the carefully impedance controlled USB traces! (Hah, at that time I have had no idea about that fact..)
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