Which service provider will provide best data planes for mobile phone at&t or t-mobile?

The only plan I can suggest you is the T-mobile plan which I am using since last 2 months. T-mobile is a nice network, a couple of my friends me for this and believe me it’s really a good network to use. For data, the t-mobile Classic web Connect 200MB Overage Free is one such plan that I believe you may like because of the access to t-mobile hotspot free access that is provided to subscribers of this plan ,plus a 200 MB data other than Wi-Fi is also there. This plan is solely for net surfers and does not include talk time. However going for add-ons is a better option to have control over what you want more and what not at all. Per day unlimited plans to give you more of options to choose from unlimited text and unlimited calls to landlines in over 50 countries, unlimited texting to any mobile phone in over 200 countries, and unlimited texting and discounted calling to landlines and mobile phones in over 150 countries, starting at just $10 dollars a month. All these plans are for no annual contract which can prove to be a little expensive at times.