1 NRIC is only applicable to sign up for 1 line on Digi 38 New plan, Koba. You need to choose which number that you want to change to this plan ya :-) TQ.
Have a pleasant day!
I hope my answer helped you! If it has, please click on "This is Helpful" to give it a thumbs up OR if this is the solution you seek, click on "Accept as Solution" to help others find their answers faster!