Based on the review, it seems the caller with the number +61415320078 is likely a scammer or a telemarketer who doesn't have any legitimate purpose. The fact that they don't talk and just sit there suggests they might be waiting for the call to be picked up by someone, possibly to record a voice or to initiate a phishing attempt.
If you're getting these calls, it's essential to be cautious and take precautions to protect yourself. It's recommended to block the number and ignore any further calls from it, as engaging with the caller could lead to potential harm or financial loss.
The caller remained silent, prompting me to block the number and disregard the call entirely.