Sample SMS verification code error

Swatch may display SMS verification code error due to the following reasons:

One is timeout. The verification code also has a time limit.

Second, it was sent more than once. In this way, the system will take the last verification code as the standard, but the reception delay of the mobile phone is serious, and the last verification code has not been received.

SMS verification code is an effective verification code system by sending verification codes to mobile phones. Both large websites, especially shopping websites, have the verification code function of SMS, which can ensure the safety of shopping more accurately and safely and verify the correctness of users. Some authentication code providers provide SMS authentication code service. Each website sends a request to the provider's server through the interface, and the server sends random numbers or letters to the mobile phone, and the provider's server verifies the authentication code uniformly.