What is the failure of Hainan Airlines' caller ID application?

1, the mobile phone is in an abnormal service state such as arrears or downtime, and it needs to be restored to a normal state before it can be processed.

2. During the period from the last day of each month 18: 00 to 8: 00 on the second day of the following month, the online business hall, mobile phone business hall and SMS business hall will suspend business inquiry and processing, and business processing will be affected.

3. When some packages are connected to the Internet, the caller ID function has been turned on by default, so it is not necessary to handle it again. Communication refers to the information exchange and transmission between people or between people and nature through certain behaviors or media. In a broad sense, it means that two or more parties who need information use any method or media to accurately and safely transmit information from one party to the other without violating their wishes.