Hi, I am confuse about how postpaid work. Can someone clear my doubt?

Let's say I have Digi30, and I used RM12 on that particular month.
Do I pay RM30 or RM12 by the end of that month?

Yes, that helps a lot, thanks ^^

Hi, would like to enquire about Digi Super Long Life package.
Is it cumulative?

Meaning, say I get the long life package, then a week later reload another RM30, is my account now active for 12 mths, or 13 mths?

Thanks! =)