Can't the first factory of Tianjin main credit information publicity system receive the verification code after writing the information?

You can't receive SMS or verification code for the following reasons: First, you can check whether the mailbox is full first. If it is full, please delete some information; Second, you still can't get it after deleting it. You can change the machine or card to see if it is a hardware factor; Third, we can try to test whether it can be received in other places and see if it is the reason for the weak local signal.

Tips: it still can't be used normally after the above reasons are eliminated. You can contact the local manual customer service to deal with this problem.