caller id says "private caller", I do not know or trust this number, caller did not leave msg. and most of the time when I do answer unknown callers and ask them to either stop calling us or remove our number from their calling list, they either hang up or continue calling us regardless

do not know or trust anyone calling from this number

They hang up. Chinese speaking. "Private Number" or "iTalk Global" on CID

caller id says "private caller" - do not know this number/caller - CS

Be careful. I got a call as your mention it , that was female call