The DG Smart Plan is RM68 monthly which includes pay-as-you-use calls/sms/mms. If I want to enjoy the free unlimited calls/sms/mms among principal and supplementary lines, does that mean I have to take another RM50 for principal and RM30 supplementary line?

So total is RM68 (Smart Plan) + RM50 (principal) + RM30 (supplementary) every month?