Check your phone’s recent calls or call log for blocked, private, or unknown numbers
Contact your mobile carrier and ask whether they can identify or trace the caller
Use your carrier’s call tracing or call blocking services if available
Enable spam and caller ID protection features in your phone settings
Use a caller ID app or reverse lookup tool to screen unknown calls
Save the number if it appears later and report repeated harassment to your carrier
Contact local law enforcement if the calls are threatening or abusive
Ask the caller to reveal their number or call from an unblocked line
Set your phone to silence unknown callers or send them to voicemail
Keep records of call times, dates, and voicemail messages for reporting