It will show all the prepaid plans available. You will see two that are $30 so make sure you choose the right one because you will not get a second chance or will at least have a very hard time changing it afterwards. So, read the descriptions and make sure you choose the one that is 100 minutes voice and unlimited text and web. The other one, that I assume you do not want, is a 1500 minute plan with a very very low bit of data.
When I say you won't get a second chance or will have a hard time changing it, this only applies to this particular plan since it is only for new activations. If you ever want to change to a different plan, that will be no problem, but you won't be able to switch back to the $30 unlimited data plan.