ROBERT SIEGEL, HOST:
There was a time when cell phones were used to make calls and many of the calls were defined by this.
(SOUNDBITE OF NOKIA RINGTONE)
SIEGEL: The Nokia ringtone, it was introduced in 1994. Last Friday, Nokia - once the world's cell phone leader - sold its dwindling phone business to Microsoft for a lot of money, seven and a half billion dollars.
Until today, no one had said what becomes of that ringtone, a tune Nokia says is played about 20,000 times a second worldwide.