Be cautious with unsolicited calls that hang up right away—these are classic signs of number slammers testing for active lines. Scammers use this tactic to identify numbers that get answered, then sell them to telemarketers or worse. Don't call back or engage, as it confirms your line is live. Block the number immediately on your phone or through your carrier. Enable spam filters if available, and report to authorities like the FTC or your local telecom regulator to help curb these pests. Staying vigilant keeps your info safe from shady networks.
Calls are cut off instantly; probably slammers testing active lines and then selling the numbers to others.
