For gauges a usb dcan cable plugged into USB hub going to the unit running behind the dash. Also an obd splitter so it's all hidden away. I also cut apart the obd splitter and wired a relay into the +12 supply which is triggered by the ignition. This solves battery drain from the dcan cable being plugged in. There's several apps like Carly and bimmerlink. I think some people got torque working, but I never got it going with USB. Yes you can listen to oem side while on Android.