Why can't China Mobile Smart Campus receive the verification code?

The software cannot receive the verification code for the following reasons:

1. The system will automatically send a verification code when the user makes an error when registering and logging in.

2. If the user has not logged in for a long time, the system will protect the login and automatically send the verification code.

3. The SMS gateway is congested or abnormal.

4. Information such as mobile phone number is leaked, and the system automatically sends verification code.

5. You can only get the verification code three times a day. If you exceed the number of times today, please try again tomorrow.