One day after its acquisition by Softbank, Sprint launched an "Unlimited Guarantee" initiative that offers unlimited talk (calls to any wireline or mobile phone), text and data while on the Sprint network, for the life of the line of service. This guarantee is applicable to both new and existing customers who sign up for Sprint’s new Unlimited, My Way plan or My All-in plan.
"Sprint continues to lead the industry in providing customers with simplicity and value,” Sprint CEO Dan Hesse said. “The Sprint Unlimited Guarantee allows our customers to lock-in unlimited talk, text and data not for just the next two years, but for life. Sprint customers won’t have to worry about their wireless bill or managing their family’s wireless usage. While other wireless providers are moving away from unlimited service, Sprint champions it."
http://www.sprint.com