About the other party's mobile phone shutdown and other issues.

1. The signal in your area is not good. Because when you send a text message, you actually send it to the nearest signal station first, then forward it to other signal stations, all the way to the operator's server, then from the server to the signal station, and then send it to the other party's mobile phone step by step.

2. The other party is turned off.

3. Everyone reminds the other party that it has stopped working, because if it is in arrears, the server will not search whether the other party's mobile phone is in the server. If there is a signal, the server will immediately return information to tell you that the other party is in arrears, which will be faster. You can try. When you really owe money, just dial it and voice the other party has stopped working. If the signal is poor or the phone is turned off, it will take a long time to answer the voice prompt, but it will be in its own area.

4. don't! The reason is described in 3.

I'll tell you one more thing. Under normal circumstances (in the absence of arrears), why do you turn off the phone and unplug the electric panel directly, and the other party will hear different voice prompts when calling you? When it is turned off, the mobile phone will send a power-off signal to the base station to tell the server that you have turned it off, so the voice prompt heard by the other party is "The subscriber you dialed is power off". If you unplug the panel directly, your mobile phone will not send any signal to the base station, and the server will not receive your signal, so when the other party calls you, the server will still search whether you are in the service area and whether you can search your mobile phone. If not, the server will think that you are not in the service area, so the other party will hear "the phone you dialed cannot be connected temporarily"!