What does Unicom test SMS mean?

China Unicom test message is an error message caused by system test. In response to relevant information, China Unicom said that this information will not affect the actual experience of users. The reason why these strange numbers appear is mainly because Unicom's background technicians are testing the information. During the service upgrade, send the information of service upgrade. Users don't need to worry too much about this situation. China Unicom will update its own system regularly and test the upgraded system at the same time, which will lead to the accident. For users, as long as there is no problem with their usual usage habits, users don't need to worry about Unicom sending harassing text messages to themselves.