SMS 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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