How to create a Wi-Fi Hotspot on my iPhone?

When I try to create a hotspot it says to contact Optus. I'm on the Optus prepaid turbo cap plus and I belive you are able to do hotspots. Do I just have to ring up optus and they will enable it or am I not able to do it at all?
Any advice would be help full.

Google it

Well I'm not sure what phone you have but you should call your phone provider and see because it would have been on there if the hot spot was pre paid.