Why can't pdd receive customer messages when it is offline?

Of course, you can't receive information offline.

Offline status means that the computer is not connected to the network. Usually, after the browser is opened, the browser is not connected to the network. By default, the browser will use offline browsing (browsing away from the network), because the web pages you usually browse will be stored on your local computer, so you can still browse the information you have browsed after disconnecting from the network.

The offline mode is simply to cut off the signal source without turning off the phone, which is similar to the use of non-intelligent shutdown. When you need to use it again, you can turn off the offline mode and use it to shorten the startup time of your smartphone. In addition, it is recommended to habitually put the mobile phone on the bedside before going to bed and put it in offline mode before going to bed to reduce radiation.