The mobile phone received a short message from 1974, which is a 10 digit mobile phone number.

This is an instant message, and some mobile phones such as Nokia have this function.

After the short message is sent, the recipient has only reading and saving options. If you don't save, there will be no information.

As for the time problem you mentioned, the probability of a problem with the SMS server is very small, which may be that the sender added time before the SMS.