The verification codes received by China Telecom’s mobile phones such as UnionPay and Alipay are all null. What’s the reason?

The verification codes received by China Telecom mobile phones from UnionPay, Alipay, etc. are all null. The reason is that the parameters (verification codes) passed by UnionPay and Alipay when calling the SMS gateway service have an error in the message format, which will eventually throw The error message of the null pointer exception is captured as a verification code and sent to the mobile phone as the error message of the verification code.

The full name of ISMG is Internet Short Message Gateway. It is mainly designed to solve the problem of SMS interworking and SP access among various networks and operators. It provides a dynamic data exchange platform system for application units to send and receive text messages. Through the interface software of this system, the SMS platform can be seamlessly and efficiently connected to various systems and software, and the dynamic information generated by the application unit's system at any time can be converted into mobile phone SMS, and the SMS center of China Mobile and China Unicom can be connected through the Monternet platform. The port special service number is sent and received in real time, establishing a fast two-way (or one-way) SMS channel for various systems (or software), so that mobile phone users can use SMS to communicate with SP in two-way and receive information services provided by SP.