Joke Collection Website - Public benefit messages - Call Unicom's mobile phone number to remind the user that he is busy, call again later, and then send me a message immediately saying that she is busy and can't come to the phone. Why?

Call Unicom's mobile phone number to remind the user that he is busy, call again later, and then send me a message immediately saying that she is busy and can't come to the phone. Why?

Hello, the other party has launched a mobile phone "call reminder" service! When the other party's phone is busy, there is no signal, the phone is turned off and the network is disconnected. Callers will receive SMS alerts. After his own mobile phone is connected to the internet, he will also receive the text message "When will a user call him?" !

I hope that helps you.