Other Radio brands may work with the setup

• an APRS igate with Tx capability [for personal use] for a baofeng

There are many ways to achieve the audio cable connections. Below are simple diagrams. You can go even more advanced with more components and cleaning up audio.

OR

There are many different variations, but they all do the same thing.

• Android to UV-5r APRS cable schematic (M0TZO)
• Miklor UV Technical - Pinouts, PTTs, etc (M0TZO)