Silent SMS

AT+CMGS="+XXXX"

echo -e "AT\r" > /dev/smd0

 for i in {1..10}
 do
    echo -e "AT+CMGS=23\r" > /dev/smd0
    echo -e "SMS PDU" > /dev/smd0
    echo -e "^Z" > /dev/smd0
    sleep 2
done