I did purchased once or twice, but I'm on prepaid.

so far so good la, at my workplace signal always LTE (10 Mb) and at home , menara digi just 500m away..so line full and constant LTE, speedtest wise 19Mb, not bad, im gonna monitor my usage this month and if exceed the quota ill upgrade to rm80 plan laa

Postpaid not sure. For prepaid, it reflect within a hour.

Purchases for Digi Postpaid will be billed in the next bill cycle.

How did you get the rebate?

The Rm 10 rebate is from porting into Digi with signing up on  certain  plan like 78 and above if I am not mistaken.

I just port in yesterday. I wonder still can can get or not. I signed up for lower plan. Will call them and try.

By going into 12-month contract with DiGi. Having been with DiGi like forever, if you are on SIM only plan, as in not on a contract with device. Normally their people will call you about a month before your current contract ends and offer you the same rebate for another 12-month so they can tie you for another 1 year.

As far as I'm concerned, normally when you take up their rebate offer, a 12-month contract will go into effect. Anyway, you should clarify with their CS again. Or you can check if you are tied to any contract through the MyDiGi app.
Did you use any SMS service ?

As for the stamp duty, Maxis doesn't have such charge for new line or new port-in. Not sure why DiGi is charging this RM10 stamp duty.