Are you using usb A port?
Here's more information on the app.
https://docs.hak5.org/hc/en-us/articles/360010471474-Internet-connection-sharing-with-the-Android-Connector-app
I think he's/she's is meaning pi3
From the [Web page](https://www.backtrack-linux.org)
Note: BackTrack Linux is no longer being maintained. Please check www.kali.org
Plus, Darren is not currently in the States at this time. He's currently in Beirut, Lebanon doing something with National geographic.
^ Oh, I don't use the bird.