The Mobilinkd TNC2 comes with complete instructions on how to pair your smartphone with the device, and how to connect the TNC2 to your radio. I won’t bother repeating the excellent instructions in the TNC2 manual. Suffice it to say that it is a simple procedure. A Teaser Trailercontains a short introduction which gives an idea about product. When I initially connected the UV-3R to the Mobilinkd TNC, I quickly realized that I had a problem. I could hear the buzzes of APRS packet transmissions, but few signals were being decoded. After some time spent trying to come up with a solution, I discovered that the problem was with the squelch of the UV-3R. It was very slow to open, which caused the packet signals to be effectively “chopped.”