No one here will be able to answer this question. It's the same as mobile phones, it's all area specific. In my personal opinion, verizon seems to have the best overall coverage and roaming agreements. But they are also the highest priced. Although when it comes to the cards, I think the monthly price is pretty much the same across the board. Sprint may work best in one area while another company may work best in another. But again, in my experience, verizon has the best overall coverage.