Question about Pioneer SPH-20DAB

I also have a steering wheel remote control. Even with this, it doesn't work for me to scroll through saved stations

With the Pioneer SPH-20DAB, it is currently not possible to save or call up DAB stations via the buttons on the radio itself; this only works via the Smart Sync app.

I have stored DAB stations on the individual programme positions. How can I call up these stations on the radio without my mobile? When I press the arrow buttons, it only jumps to the next receivable station