Possible Clues:

• Dropped a dime, so to speak
• When you gave her a ring, she may already have been engaged
• Checked in, maybe
• Called for graduate collecting individual
• Got a hold of, maybe
• Used one's mobile device
• Was a call-in guest
• Called to have one removed - it's what makes you a doctor!
• Rang doctor to get one in
• Made a call