What company gives a good/cheap Pay As You Go plan for iPhone?

Okay so I'm planning on getting an iPhone 4S in the near future, unlocked to any company/contract, and I was wondering what phone company offers the best/cheapest Pay As You Go Plan for about 30 dollars that supports iPhone. I would like a plan with unlimited texting.calling isn't that important but I would like some good data usage too! Let me know!

Where are you located? Have a look at the link given below, it will help you out.