How to use simple mobile on iphone 5?

So i'm ordering a iphone 5 in a few weeks. And i want to use the simple mobile service. But i want to make sure that its possible first. And if so, how do i do it? Because i remember when i tryed to get that service for my iphone 4, they said i needed a gevey sim, and when i got it, it still didn't work.

Better just call customer service for your provider and ask before you waste money.