I'd suggest using a USB thumb drive/memory stick rather than your phone.
Load it up with many gigs of tunes and leave it plugged into the saddlebag port. Control all the playback from the hand controls.
So easy to replace the tune list if you have your songs on a computer.

OR...
run a USB extension cable from the trunk back up to the front of the bike where your phone will be. Easy.

Ride safe.