Article 3.1.2R : AT Commands for SMS in Vision tek modem
Open
Hyperterminal Tool and configure the settings, then in blank page type the
below commands one by one with enter key (↵).
AT
↵
AT+CMGF=1
↵
AT+CSCS=”GSM”
↵
AT+CMGS=”Receiver
Mobile number with country code”
↵
Type Message
and then press ctrl+Z for sending of SMS