I'm sure you know more than I do about this, but have you tried 1) turn on controller, 2) turn on device and the app, 3) turn on the P3? Make sure all apps are "killed" before you start.Yes, I can get the Go app to work. But it is a little tricky. I have to restart my phone, go to app manager and "stop" the GO app, go to USB and change it to MIDI, turn on the transmitter, then the P3, then hook the phone to transmitter then start the app. 50% of the time it will connect and I can go. 50% of the time it does not and I have to do it all over again. When it is connected, it stays connected. With Litchi I could get it to connect 1 out of 20 tries, but as soon as I touched any of the settings it would disconnect. I tried everything, I uninstalled any app that needed the USB port including GO, cleared the cache, enabled and disabled USB debugging. (Litchi told me that USB debugging should not be on with Litchi or GO), tried all the different USB options. Nothing worked. I even did a factory reset of my phone and only installed LITCHI, no dice. It still would not work. Finally Litchi said "oh yeah, the app is not compatible with your phone. I do not understand why, Maybe they were just tired of guess what to do to help me. I did get a refund. Seems LG phones have the same issue. My android tablet connects no problem 100% of the time. (Shield K1). So I dunno. I am usually really good at troubleshooting computers, phones etc. But this app just didn't want to play fair.
Or... get an iPhone for your P3...problem solved.
