Voicemail can be a useful pause point before you return an unknown call. Listen for a clear reason, a company or personal name, and a calm way to continue. If the message is unclear or asks for personal details urgently, verify through another channel before responding.
Compare the voicemail with what you already know: saved contacts, recent appointments, messages, and any phone number lookup context. Use these signals together, keep notes brief, and avoid sharing private information until you are comfortable that the call is expected.