Oh well I went to Yes Kiosk Main Place USJ to buy the prepaid SIM to test, picked a number (018-688 xxxx), waited for 15 minutes for the guy to call his supervisor to guide him on prepaid SIM registration, at the end he told me "Sorry system not ready yet".

I guess they need to introduce a basic prepaid SIM card registration training to all their employees, it is too unprofessional, either they rushed for the launch or they didn't have time to pass the info to all the kiosk/dealer to assist potential customers.

Cannot

Yes, the SIM card is a triple punch SIM card (standard & micro & nano all in one).