What's The Process in Porting out from Postpaid to Prepaid ?

I have approx. 2 weeks left in my PostPaid (5 December contract expiry) and i want to switch to PrePaid.

I want to minimize the $ damage charged by my PostPaid provider; how should I correctly port this service out?

Being PostPaid, i am not sure if the process is the same as PrePaid to PrePaid.

The 2 questions are:

  • Do I activate and initiate the port out on the same day (5 December) or to ensure $0 penalty, do I need to do it a day after (6 Dec) ?
  • Do I need to advise my PostPaid provider that I'm porting out? because with PrePaid, we don't do this advisory, we just activate and port.