There are three giants in telecom industry in China including China mobile, China unicom and China Telecom. If your girlfriend has changed her mobile phone internet to China unicom, you are not supposed to receive msgs from China mobile. That's why it seems funny.

因为那个女生A将手机通讯录里某个人(For example, Damon)的名字换成了10086。 当A收到Damon的短信时，手机上显示的发信人是‘10086’，而不是‘Damon’，所以其他人就不知道A跟Damon之间有不可示人的秘密。 当手机的网络服务商从 中国移动/10086（10086 is the service number） 换到 中国电信/10000 的时候，理论上来说只能收到10000发来的短信，不会收到联系人是10086的短信，这个是矛盾所在。此时的10086的短信实际是Damon发来的。

中国有三大电信运营商：中国移动、中国联通和中国电信。10086是中国移动的官方号码，电信的号码则是10000和10001。如果你使用中国移动的手机卡，你就会定期收到10086发来的短信。这个笑话的作者的女朋友换了电信的手机卡，而移动的10086却还在每天发消息给她，只能说明她把某个联系人的名字修改成了“10086”，试图借此骗过作者

There are three giants in telecom industry in China including China mobile, China unicom and China Telecom. If your girlfriend has changed her mobile phone internet to China unicom, you are not supposed to receive msgs from China mobile. That's why it seems funny.