Usage: gwmodem [OPTION...]
gwmodem allows to control modem functions

Examples:
  gwmodem at+cgsn               # send at command to see imei
  gwmodem chat SCRIPT           # execute chat script
  gwmodem edit                  # edit sim1.conf and sim2.conf
  gwmodem info                  # show info
  gwmodem reset                 # reset modem
  gwmodem resethw               # reset modem
  gwmodem select 2              # select SIM2
  gwmodem sendsms NUMBER TEXT   # send SMS, TEXT is optional

