ZDNET's key takeawaysAT&T Business' top plan includes unlimited hotspot data, with a catch. The Ultimate 3.0 plan costs $75 to $110 per phone line with discounts. Called Unlimited Your Way for Business, it includes four plans at launch: Business Unlimited Ultimate 3.0, Premium 3.0, Advanced 3.0, and Standard 3.0. Business Unlimited Ultimate 3.0's biggest benefit is its unlimited hotspot data. Business Unlimited Ultimate 3.0 comes with AT&T Turbo for Business at no additional cost, as well.