The defmcc parameter (see the chg-gsmopts command) must be provisioned before the MT-Based GSM SMS NP feature can be turned on.
Recovery
Display the current values for the defmcc parameter. Enter the rtrv-gsmopts command.
The value for the DEFMCC option must be something other than NONE.
If necessary, enter a new value for the defmcc parameter. Refer to the command description in Commands User's Guide and to G-Port User's Guide for assistance.
Re-enter the chg-ctrl-feat command that generated this error message.