search for: rino120

...mode that allows use with repeaters and duplex base stations. I >think this is essential for successful integration with a phone system. so i check 2-way radio on the garmin site http://www.garmin.com/outdoor/products.html#2-way http://www.garmin.com/products/rino/ http://www.garmin.com/products/rino120 http://www.garmin.com/products/rino130 I phones tech support & they claim in gmrs mode and frs mode these radio are not duplex... did you have some more info here is thre some other garmin product you are using ?