Unicom sends a text message to verify that there is no information.

If you can't send SMS, you can check whether the following conditions exist:

1, SMS center number is set incorrectly;

2. There is no signal or the mobile phone battery is insufficient;

3. The mobile phone shields the short message sending function;

4. Blacklisted by SMS;

5. Insufficient quantity balance;

6. SMS inbox and outbox are full.

If the above situation is still unresolved, it is recommended to contact the local manual customer service for handling.