I have been BLESSED with the opportunity to help repair a companion site. I have been told that they have about 20 "Antennas" and even if you are in close proximity to an antenna you can have a dropped or very very poor call quality. Over the phone I had them use two phones and try to look at the antenna units for a red light showing that both "channels" were being used. Never happen. Well now I find out that in this particular area on the perimiter of the building there is about three antennas per floor/ 3 floors/ overlapping. So I don't know which one I might be pulling off of so I can find out which unit is bad or has very poor transmission distance. Is there anything short of turning off all but one antenna at a time and testing?? Man this is frustrating.