Most phones have that wide conector on the botom whith a lot of pins.Thats where the USB cable goes in
I have an tiny SCART shaped conector whith 4 pins That is used to conect the USB directly whith no circuits betwen.It also charges over that conector(It aslo charges over USBs 5V line)
I got the USB cable whith the phone.
I also have IR(But no bluetooth)
My frend also has an Motorola that has bouth the USB conecotr and the wide conecotr on the botom.
Its a headace tranfering stuff over IR.Sunlight messes whith it.It somtines dosent want to work,It takes forever to transfer an MP3(It takes about 2-3 minutes while i get it in 10 seconds over USB)