I have purchased no less than four KG-905's, for myself and others. Of all the Wouxun KG-series radios I have owned or used, they were the very worst with regard to PL decoder issues I have experienced, whereby the CTCSS/DCS decoder will sporadically fail to open for another base, mobile, ht, or repeater, that transmits the same tone as the decoder is set for. FWIW, I have experienced this issue with every single Wouxun KG-series radio I have owned or used. The list includes the 905G, 935G, 935G+, S88G, and 1000G. Many will swear they have never experienced this problem with their Wouxuns and that may be. Reasons they may not have experienced it might include not using the PL/DPL decoder often, not using the radios much or often, or perhaps they were really lucky in getting a good radio. I find it difficult to believe that all of the radios with the decoder issue have wound up exclusively in my possession.As this has been an intermittent issue for me across a number of frequencies, PL's and DPL's, and brands of radios received, it is very difficult to diagnose.
I love the basic Wouxun platform and channel layout, which allows for use of all thirty GMRS channels PLUS being able to program a variety of simplex and repeater channels to your liking, using differing PL/DPL tones; but the decoder issue has become a deal killer for me. I will not be buying any more Wouxuns unless and until they acknowledge the issue and fix or change the decoder algorithm to eliminate this issue.