What do you mean, SMS shows that it is being sent, and it is gone?

SMS can't be sent out for the following specific reasons.

1, no signal or poor signal, you can go to a place with strong signal to test.

2. The mobile phone has turned off the short message sending function. You can turn on SMS and try again.

3. If you are blacklisted by SMS, you need to go to the business hall to delete the blacklist before you can use it normally.

4. The balance of the number is insufficient, so you can pay and try again.

5. There is something wrong with the mobile phone, so you can change the test.