Will my magnet-mount antenna work if placed on a non-metal surface? weBoost Support - September 09, 2016 17:25 Related articles Do I need a 4G booster, or will a 3G model be sufficient? All About Cable What is the difference between the Drive 4G-M and Drive 4G-X? Using Other Antennas for Vehicle Boosters Why do I have to install the tower (outside) antenna and device (inside) antenna so far apart? No. A magnet mount antenna must be placed on a ferrous metal (iron or steel) surface for it to work.