How do spam callers get your number in the first place?

原文摘要 · 中英对照

Ever wonder how a total stranger ended up with your phone number? The answer starts earlier than you think, and a few small habits can keep it from spreading.

你是否想过一个完全陌生的人是怎么拿到你的手机号码的？答案的起点比你想象的更早，而几个小习惯就能阻止它扩散。