Cheapest phone plans from AT&T, Verizon, T-Mobile and Sprint
https://www.cnet.com/news/at-t-vs-verizon-vs-t-mobile-vs-sprint-how-to-save-the-most-and-get-the-cheapest-phone-plan/
All the carriers offer unlimited talk and texting, so your decision will likely come down to the cost of data. Unfortunately, there are no apples-to-apples here. AT&T, Sprint, T-Mobile and Verizon's data plans are all slightly different.
The handy chart I made below should help. It compares the total cost over two years on each carrier except T-Mobile -- more on the "uncarrier" later. To make things as easy as possible, I added up the costs of carrier activation fees, monthly line access charges, financing a new $649 phone (the price of a 32GB Google Pixel or iPhone 7) and a monthly data plan over 24 months -- this does not compare taxes, surcharges or other regulatory fees (and my sanity hopes you'll understand).