Nokia China Unicom card cannot send text messages

If the mobile phone cannot send text messages, you can try to restart it 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 peak SMS sending volume during holidays. It is recommended to 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 outgoing box are full; 10. Check whether the SMS function is enabled. If the above reasons still cannot be solved, you can contact China Unicom manual customer service for processing.