Hello Chuck,
I just noticed your message. I am trying to get my QDX-M to work with andFLmsg on an android phone, so a different application from you. I might however be able to solve the first part of your problem of getting the phone to recognize your QMX.
I obtained a terminal app from the Play Store, I used "Serial USB Terminal". Once the app was installed and I had connected by OTG cable to the QDX, I opened the app menu, selected USB devices and found there the QDX device. Selecting it caused the app and QDX to connect. I then selected the radio app I wanted to use (in my case andFLmsg) and I was able to communicate and send text to the QDX for transmission using Olivia (in VOX mode). I am still having problems receiving audio back from the QDX to the phone, but I figure I am more than half-way there!
Let me know if this works to establish communication between your phone and QMX.
