Mobile text message delay

The reason why the mobile phone is not excluded is because I am not sure whether the time when the SMS was received is the timestamp stamped on the called mobile phone or the timestamp stamped by the SMS center. But this is easy to be sure. You can turn off the phone and then use the command method to send a text message to the turned off phone. Wait 10 minutes and turn on the phone. Check whether the time when you receive the text message is ten minutes ago or ten minutes later. If the time is ten minutes ago, it can be determined that the timestamp comes from the SMS center, otherwise it comes from the destination mobile phone.

If the timestamp comes from a mobile phone, it must be a problem with your mobile phone, but it is not a problem with the SMS sending and receiving module, but a problem with the SMS prompt. Maybe the text message has been received, but it just didn’t remind you in time; otherwise it should be a problem with the mobile network. The network range is too wide. To sum up, there should be two reasons:

1. Coverage level. If the coverage is not good and frequent switching occurs, it may cause delays in receiving SMS messages. After each switch, the network core equipment has to wait for a few minutes. If there is no more switch within these minutes, the mobile switching center will send a Notify message to the SMS gateway. After receiving the Notify, the SMS center will send the SMS backlog in the SMS center one after another. to the called mobile phone. So there will be times when you receive text messages at different times at the same time.

2. Temporary failure of the SMS center or SMS gateway. This depends on whether the people around you have the same phenomenon. If it is the same as you, then it must be this reason.