Answer unknown calls only if you are expecting one
Let the call go to voicemail
Check the voicemail message for caller details
Use caller ID or call log if available
Search the number online if it appears in your call history
Block the number if it is spam or unwanted
Report repeated scam calls to your carrier
Do not share personal information with unknown callers
Use a call-filtering or spam-blocking app
Enable silence unknown callers on your phone
Save important contacts so known numbers are recognized
Call back only if you can verify the caller is legitimate