I sent a text message to my relatives and friends before May Day, but my mobile phone can't send it. Please let me know, thank you!

It should be excessive. According to the regulations of the General Administration, if you exceed a certain number of short messages, your short message function will be stopped. The regulations in different cities are slightly different. If we send more than 200 messages per hour (500 messages per hour on holidays) or send more than 1000 messages per day (2000 messages per day on holidays), it is an excessive number of messages. You can call the 100 10 manual station directly to recover!