1. For maxis, once register for the line request for public IP from their customer support. Tell them you need to view CCTV, that will reduce lotsa explanation, they seem to understand only that for our reason for public IP. Postpaid package because we are business registered. We are using RM68 plan.

2. For Celcom line, I not sure about M2M but we subscribe for their business SIM card package postpaid plan ( advanced payment for 6 months though) that automatically allocated public IP without asking. It comes with 200G monthly data quota, but quite costly. It only available via their partner, agent kiosk at shopping mall dun carry it.

4G doesn't work, use only 3G for PRE-MAXISBB for public IP.