The MT-Based GSM SMS NP feature must be turned on before the MT-Based GSM MMS NP feature can be turned on.
Recovery
Display the status of the MT-Based GSM SMS NP feature. Enter the rtrv-ctrl-feat command.
If the feature does not appear in the output, then the feature is not enabled. If the feature has a status of OFF, then the feature is enabled but is not turned on.
Enable and turn on the MT-based GSM SMS NP feature as necessary. Refer to the G-Port User's Guide for assistance.
Re-enter the chg-ctrl-feat command that generated this error message.