Telecom card can't send short messages. What is the reason?

If the mobile phone can't send short messages, you can try to restart or replace the mobile phone to test whether there are any of the following situations: 1 The number of the short message center is set incorrectly, please re-enter the correct number of the short message center; 2 No signal or insufficient battery power; 3. The system is busy during the holiday short message sending peak period, so it is suggested to try again later or avoid the short message sending peak period; 4 The sending format is incorrect. 5 The sending time of SMS is more than 24 hours. For more service benefits, click on "official website" customer service 402 below to answer your questions.