A wireless signal repeater for portable wireless communication devices includes an adapter for connecting a portable wireless communication device. When a portable wireless communication device is connected to the adapter, the portable device's own omni-directional antenna is disabled, and the portable device instead uses the repeater's directional antenna. Specifically, the adapter carries forward link signals received by the repeater's directional antenna to the portable wireless communication device and carries reverse link signals from the portable wireless communication device for transmission by the repeater's directional antenna.