Never give out personal information such as account numbers, Social Security numbers, passwords or other identifying information if you are at all suspicious.
Additionally, UScellular's free Call Guardian app provides spam call identification based on known offenders. Users can also report suspect numbers quickly within the app or by going to reportarobocall.com. Call Guardian Premium ($3.99 per month) provides enhanced call details, including "Potential Spam", "Potential Fraud" or "Robocall" with a risk level of "High", "Medium" or "Low" to better inform you on who is truly calling.