Because of real-time number analysis and almost instant call reject all unwanted callers won't even know that they are blacklisted, they will just hear busy tone all the time. 由于采用了實(shí)時(shí)的號碼分析，和幾乎是即時(shí)的拒接，不受歡迎的致電人甚至不知道自己已被列入黑名單，他們一直聽(tīng)到的只是忙音。
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