The mobile phone has changed a battery, and I can't receive the epidemic prevention code message.

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 receive the verification code. I suggest waiting for a while to 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 can't receive the verification code, please contact the operator's customer service immediately.

For example, some users can't receive the verification code because they have set up SMS blocking related services, which are generally manifested as "focus complaint service-all value-added services are prohibited", "credit service" 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 that this service will be blocked after the verification code is issued).