China Unicom cannot send text messages

If your mobile phone cannot send text messages, you can try to restart or change the mobile phone for testing, and check whether the following conditions exist: 1. The SMS center number is set incorrectly; 2. There is no signal or the mobile phone battery is low; 3. The system is busy due to the peak SMS sending volume during holidays. It is recommended that you try again later or avoid the peak sending period; 4. The sending format is incorrect. If sending a text message to a PHS user, the area code must be added before the number; 5. The text message sending time exceeds 24 hours; 6. The mobile phone has blocked the text message sending function; 7. Being included in the text message blacklist; 8. The number balance is insufficient; 9. SMS The inbox and outbox are full. 10. To inquire whether the SMS function is enabled, you can contact the local manual customer service for processing. If the above reasons still 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 leave it to the staff for processing.