Sending mobile phone epidemic prevention SMS failed.

The verification code of epidemic prevention code is issued by SMS gateway of each operator. If the number of requests is too large in a short time, resulting in SMS congestion (such as peak hours), you will not be able to receive the verification code. It is recommended to wait for a while and try again.

In addition, if the user actively prohibits the value-added service, it needs to be reopened before receiving the verification code normally. If you still cannot receive the verification code, please contact your operator's customer service immediately.

For example, some users can't receive the verification code, because the related business of SMS blocking is set, which is generally manifested as "focus complaint business-all value-added services are prohibited", "credit business" or "blacklist", and they need to call the customer service of the home operator to lift the restriction (it is necessary to make it clear with the customer service party that this business will be blocked after the verification code is issued).