There is No AT Command to Remove “CNS Port”, “DM Port” and “NMEA Port” of MOBITEK S80 Modem / support case #281 CONCLUSION: There is no AT command to remove “CNS Port”, “DM Port” and “NMEA Port”; These 3 COM ports can be disabled in “Device Manager” but cannot be removed; If “CNS Port” is disabled, modem will not able to send out SMS