Buy on Amazon : br br Wilson Electronics Dual Band - 800-1900 MHz Magnet Mount Antenna with TNC Male Connector and br br Dual-Band Tri-Mode 800MHz 1900MHz Analog and Digital br Compatible with all Cellular PCS and iDEN providers br Easy to install br Removable - easily transfers from one vehicle to another br 10 to 15 times more signal than a cell phone used inside vehicle without an external antenna