8.30 Friday night, relaxing after dinner and my phone stops after 3 rings. This is not the first time. I dont know who it is, but I think they are trying to goad me into calling back. No way Jose'.

Clearly a scam. Do not answer and block.

Random caller, at least once a month, no message, hangs up.

Calls me every 2 days, hangs up as soon as i say hello

Called today, after 3 rings it stops, no message left. Seems like a scammer call to verify the number is valid.
Do not call back this number.

Another phone pest who does not leave messages.

Rings weekly, no message. I not answer.

Someone keeps calling me from this number and dosen't give me enough time to answer.

Called, no message. Had lots of similar numbers call me and now I ignore them all.