You guys are making this way too hard...When you change antennas on a G4 or G5,,, you need to either power down the radio, then power it back up OR switch to another knob position and then back so the radio will RE-SCAN that system with the NEW antenna. My 2 G5's both show hearing 2 sites with the stock antenna, when I switch to my motorola and make the the radio do the re-scan it come up with 4.