On my '23 RT, I can listen to the music from the bikes radio (XM, FM, AM,) through the bike's speakers, or with a second old phone (no cell service or Wifi) connected to my good phone through it's personal hot spot Wifi. It works great, and I can go back and forth between the two.
The cell company wanted $40.00 a month to add a line to do this, but this option is free.
Steve