Why can't I send short messages on my Unicom number? Sms center. yeah. What happened?

If the mobile phone can't send short messages, you can try to restart or replace the mobile phone for testing to check whether the following conditions exist:

1. SMS center number is set incorrectly; 2. No signal or low battery; 3. The system is busy during the peak period of holiday SMS sending, please try again later or avoid the peak period of sending;

4. The sending format is incorrect. If you send a short message to PHS users, you need to add the area code before the number; 5. The short message sending time exceeds 24 hours; 6. The mobile phone shields the short message sending function; 7. Blacklisted by SMS; 8. Insufficient quantity balance; 9. SMS inbox and outbox are full. 10. If the SMS function is enabled, you can contact the local manual customer service for processing. If there is something wrong with the mobile phone card, you can change it in the local business hall. If the above reasons cannot be solved, you can contact the local manual customer service or go to the business hall to confirm whether the SMS function is enabled and hand it over to the staff.