phone ring analysis
when you call someone and they don't answer so you count the number of rings to tell if theyre either ignoring you, have their phone turned off, or if they just didnt get to their phone in time

no rings and goes straight to voicemail means theyre phone is turned off when you called.

5 or 6 rings means they just couldnt get to their phone

anything less than 3 rings means they looked at their caller id and chose to ignore
She's still mad at me because i used a phone ring analysis after i called her and it rang only once so she ignored my call