How do you use the poke-flute in you pokegear in heart of gold?

Answer 1

first of all the poke-Flute can only aceesed if you got the pokegear upgrade in lavender towns radio tower and once you get that you go to your poke-gear and use your radio and then move curser to the top off the screen

Answer 2

On the Radio move the dot near the top of the circle

Answer 3

Put the dot to the very top of the screen nubes.