Call Knot
A "Call Knot" happens when one person calls the other while the person calls them. It goes on until one waits for the other to call. Usually if you're in a call knot, the call will go straight to voice-mail.
George: I tried calling you but you just went straight to voicemail!
Harrison: SAME HERE. we were in a call knot!
Harrison: SAME HERE. we were in a call knot!