是第400集《心存疑惑的小兰》。
柯南只有一个手机和一个号码。所以在给小兰打电话时要隐去来电号码。
小兰怀疑柯南身份，而阿笠博士手机和自己的相同，所以柯南为了掩饰身份，借了博士的手机，事先在其中存入几封邮件并设下密码，伪装成自己的手机。让小兰对着阿笠博士的手机“解密”。另一方面，柯南准备了一个新号码作为新一的手机号。
It's episode 400, "Xiaolan with doubts".
Conan only has a cell phone and a number. So when you call Xiaolan, you should hide the calling number.
Xiaolan suspected Conan's identity, and Dr. Agasa's mobile phone was the same as his own, so Conan borrowed the doctor's mobile phone in order to hide his identity, stored several emails and set a password in advance, and disguised it as his mobile phone. Let Xiaolan "decrypt" Dr. Agasa's mobile phone. On the other hand, Conan prepared a new number as the new one's mobile phone number.
第572集
小兰从昏迷中醒来时发现自己在一个小木屋里，并且身上的伤也被人包扎好了，这时，小五郎他们也找到了这里，服部在隔壁的房间发现了很多新线索
