I just received a call from Maxis TRX. They said they need to reconfirm tomorrow because of stock uncertainty. Hence cannot come pick up first.

Not simple as that.. The IMEI will be blocked until you register the phone with local customs. The fees are pretty steep—around 40% of the phone's value. If you have a work visa, you can get it down to 30%. I can say, Apple products are way more expensive there compared to Malaysia and Singapore.