[Jim_in_VA]

Keep in mind any mag mount omni antenna is designed for mobile use, that is, its meant to be placed on a vehicle which creates the ground plane for it. If you are going to use it inside a building it must be placed on a metal surface to provide the same ground plane. The higher the dBi of an antenna the further it will reach, yes, but it also reduces its verticle RF pattern. Kind of like a beach-ball when you step on it..it squishes outward but its height is reduced....same with antennas and dBi. So high dBi is not always the solution. Particularly if you are relatively close to the cell tower.

Hope this helps