BlackBerry

The RIM BlackBerry does not have an antenna port so an inductive coupler adapter is used instead. While inductive couplers do work they do not perform as well as antenna adapters that plug directly into a phone. To improve the performance of an inductive coupler, you can add an 811201 inline amplifier or use a SignalBoost amplifier instead. (SignalBoost amplifiers include a smaller inductive coupler.)