This document is a user guide for M22 / M23 / M23G AT Commands. It describes the features and characteristics of the product.
The AT Command User Guide introduces the interface between the terminal equipment (TE) and the mobile station (MS), explains how to set up a test environment, and describes handling of SMS messages. It provides background on the GSM standard commands and the specific extensions used by BenQ devices.
The manual lists all supported AT commands, grouped by function such as general commands, call control, network services, facility lock, mobile status, phonebook, short message service, data compression, and fax operations. Each command entry includes the command name, syntax, and a brief description of its purpose. This manual is written in Chinese.
Use the +CGMI command to request manufacturer identification.
Send an SMS with the +CMGS command.
Use the +CSMP command to set text mode parameters.