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An unfamiliar number calls, then drops the line the moment you answer.
Silent calls like this often signal automated systems testing active numbers, a tactic scammers use to harvest data for future spam or phishing. Surprisingly, what seems like a harmless hang-up could be the start of more intrusive contact. Hang-ups on answer are classic for verifying if your line is live, potentially leading to unwanted calls or identity risks. Block the number immediately using your phone's features or carrier tools, and report it to authorities like the FTC or local telecom regulator to help track patterns. Enable call screening apps for better protection, and never call back unknown numbers to avoid fees or traps.
An unfamiliar number calls, then drops the line the moment you answer.