Cannot sleep Riddle

Puzzle of the Day 2108 : Cannot Sleep Puzzle
Puzzle 2108 - Cannot sleep Puzzle Riddle

A man tossing and turning
In his bed and could not fall asleep
Then he took his phone, dialed a number
Listened to a few long tones, put down
And fell asleep

What just happened here?
Why wasnt he able to that before?

The answer will be posted soon. Click here to get the answer right into your mailbox.