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What do you mean by the wrong format of SMS command?

This situation means that the SMS command sent does not match the required format.

Short message instruction is a specific format, which is used to send specific instructions to service providers or systems to perform corresponding operations. If the short message instruction format is wrong, it is usually because the instruction is not written in the correct format, or the instruction contains incorrect syntax or parameters.

You can consult the corresponding documents, manuals or guides to determine the correct instruction format and parameter requirements. And the provided parameter values or contents meet the requirements of the instruction format. For a specific instruction, it may be necessary to provide the correct options, Boolean values, or data in a specific format. If an example or sample code is provided, you can use it as a reference for the correct instruction format.