Ok. I just read about desensing. Makes sense. But now I have a problem with my new gm-21. I can hear the repeater, and I've programmed the right tones, but people can't hear me. The manual is of no use, and youtube has like one video on this radio since it's so new and it's from gadget talk youtube channel. He's great, but he didn't go into repeater programming for this unit, and the box didn't include a programming cable, so I will need to program on the unit itself. Does anyone have a baofeng gm21 and know how to program a repeater so I can get the tail squelch tone at the end of the transmission? That way I will know if I'm hitting it. I'm trying to hit towson, md from pasadena, md and can always hit it on my uv9g.