I was just wondering how this headset is being advertised as being compatible with the blackberry pearl 8100 and the curve 8300 when they both have different audio port sizes. The Blackberry Pearl carries a 2.5mm (which upon investigation is realised is what this headset carries), while the Blackberry Curve carries a 3.5mm headphone jack port. Is it equipped with an adapter (such not stated), even so, why would I buy a headset to use an adapter when 3.5mm headsets are available?