Just a note.....there is no need to use Bluetooth. The phone has to be on charge with app iPhone cable. To the right on the steering wheel there is the “speech “ button. Press and hold until your get the “Siri “ sound. I say “play all music” and I get the reply, “playing all music, shuffled”. Won’t play whats on Spotify tho, just what on the iPhone music folder.
You can use the left and right arrows to next track or last track.
If you use Spotify and you use the next track but you cannot back track unless you pay premium membership.
I bought a Samsung 128GB USB stick, and put all of music onto that, and it lives permanently in the USB port of the car.
I just copied my entire music folder onto it and it works a treat.
Make sure the USB stick is formatted to match your Sync system - I believe FAT32 for older systems like Sync 1 with a maximum 32GB size, and exFAT for newer Sync 3 systems that can handle larger capacities.