I called Apple to ask about some problem.
Support center and I talked on the phone for 20 minutes.
Sometimes,support center put that call on hold temporarily.
But the time on hold wasn’t as bored as I thought.
The holding tone was “I walk the Line” by Johnny Cash.
Because I like this song.
Also I like the guitarist.
The guitarist of Johnny Cash trio is Luther Perkins.
He is one of my favorite guitarist.