I bought a Sony Ericsson Bluetooth earpiece (HBH-60) in the early days and used it with a Nokia. Now I cannot pair it with my new Nokia 6300 or a new Sony Ericsson. I have now seen a HBH-PV702 which will pair. The charger does seem different. My question is...is there more than one type of Bluetooth such as old and new? I have searched the net and am non the wiser!