Which is plan is cheaper with the iPhone5 AT&T, Sprint, or Verizon?

I'm about to order an iphone

I pay exactly $84.95 every month with sprint. 450 min, unlimited text and web. Some have said they've had a bad experience with sprint but I haven't.

Sprint… 70 unlimited calls txt 1gb data
80 unlimited everything

Verizon 90 ulimited txt and call and 1gb of data for 90… 2gb for 100. 4 gb for 110

Att… Calls 450 mins… Unlimited mobile to mobile unlimited txt… 3 gb of data for 90

Sprint is the slowest in many areas… My area its 3g internet…

Verizon is fast lte… Not as fast as att but works better in rural areas

Att the fastest… Very reliable network…

But coverage depends on where you live

Sprint is the cheapest plan out there with unlimited data txt and call. The only carrier that provide unlimited data