weBoost Support - September 09, 2016 17:25 Will my magnet-mount antenna work if placed on a non-metal surface? Print No. A magnet mount antenna must be placed on a ferrous metal (iron or steel) surface for it to work. Related articles What to do if my vehicle's body is aluminum? Do I need a 4G booster, or will a 3G model be sufficient? Where can I download my booster's install guide / owners manual? Using Other Antennas for Vehicle Boosters Why do I have to install the tower (outside) antenna and device (inside) antenna so far apart?