Why is the text message sent to me delayed? Is it a mobile phone or a SIM card (China Mobile)?

There are many possible reasons for this problem:

1. For example, if there is something wrong with the mobile phone itself and the hardware, you will accept the SMS delay;

2. Some intelligent machine systems have problems, resulting in poor signal and delay due to the system itself;

3. On the same floor, the signal is not good;

4. "The difference between the time of receiving the message and the time displayed on my mobile phone is ten minutes or even dozens of minutes!" Is the watch on your mobile phone not accurate?

In short, it is difficult to give a clear answer to your description now. I suggest you go to the maintenance office.