Sending text messages is blocked.

If the mobile phone can't send SMS, you can try to restart the mobile phone or change the card to check whether the following conditions exist: 1. Whether the SMS center number is set correctly, please enter the correct SMS center number; 2. No signal or low battery; 3. Because the system is busy during the holiday short message sending peak period, it is suggested that you try again later or avoid the sending peak period; 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. The other party's number is blacklisted by SMS; 8. Insufficient quantity balance; 9. SMS inbox and outbox are full.

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