If the call was from CIC folks probably it an invitation for the Oath Ceremony. That's good news and wish you all the best !!!
Unless there was a voice mail or missed call (you not mentioned) showed caller ID as CIC , how do you know call was indeed from CIC ?
Without been skeptical, knowing our desperate wait for Oath letter, hope somebody did not make prank calls. Hope I'm wrong on this.
We will be very happy if that call was indeed from CIC for your Oath Ceremony. Pls remember to share details once you speak to CIC.
The caller ID says: Citizenship& Imm
and hopefully it's the invitation for the Oath.