In order to buy that monthly data plan, the RM30 that he tops up will make the card active for that month.
That is, if he's not bought the SLL option.
We can also do a quarterly top-up of RM100 (which will give you 120 days validity).
Once we have subscribe this monthly RM28 7Gb data plan, it will be auto renewable for the following month; 3 months x RM28 = RM84, balance of RM16 credit can use for other purposes.