Saw a called that apparently did not set off the vibe mode on silent but since I was waiting for an important call and was paying attention closely to the phone,anyhow I returned the call and don't even remember what they said but just heard "press any number to be taken off our list." anyhow I pressed a number I think I pressed #1 but I'm not sure, what can someone do to someone else anyhow by pressing a number on a phone key phone key?

Didnt set off my ringer. I called back and it says press any number to be taken off our list. Didnt press any number, but i wanna know what list and who this caller is.

They called, I missed the call, didn't recognize the number, they never left a message.

Missed the call, and didn't call back since I didn't recognise the number.  Caller left no message.

just received call...no message