'''gsmctl''' command is specifically used to communicate with the modem module of the router, allowing to control and obtain information via command line interface. The '''-A''' option means that the following will be an AT command. The “ '''AT+QCFG=“band”'''“ AT command is used for band configuration, in this case, setting specific bands. The meaning of the following numeric values: | '''gsmctl''' command is specifically used to communicate with the modem module of the router, allowing to control and obtain information via command line interface. The '''-A''' option means that the following will be an AT command. The “ '''AT+QCFG=“band”'''“ AT command is used for band configuration, in this case, setting specific bands. The meaning of the following numeric values: |