Which cell provider is best for me?

I plan on buying an iPhone 5c. I have looked at a lot of sites comparing AT&T, Verizon, T-Mobile, etc. And they all kinda say that for iPhones, AT&T is the best. Is this true? I live in Indiana and so far the coverage maps all are strong for my area. I do not understand the numbers and gb much but what I plan on doing is: just me, barely use any of the plan to reduce cost, if Wi-Fi is available i will use it, and such. I like AT&T(apparently the most reliable) and T-Mobile(best with costs and fees) out of them all. Basically I want the 5c but to be reliable and fairly priced at the same time… But I don't know which to pick

I have Sprint in the Kentuckiana area. The prices are great, they give you great corporate discounts, and their service has gotten MUCH, MUCH better over the years. They are at their greatest yet. Plus, you don't have to worry about going over your data limit because Sprint is the only phone company to offer unlimited data, talk, and text.

I recently left Verizon for AT&T. Verizon is expensive. The biggest complaint is no matter how careful, the data usage seems to go up and up, especially with the iPhone.
Stick with the big companies and post paid accounts. Smaller companies and some of the prepaid plans on big companies have poor service and are limited to 3G speeds.
The Framly plan from Sprint sounds good if you can find a group to join