T-Mobile was rumored to be following in Sprint's footsteps with a nationwide launch of its GoSmart prepaid MNVO, and now it's official; Reuters reports that starting today, GoSmart will be available at over 3,000 reseller stores in the United States. The same plans will carry over from the service's trial period: a $30 plan with unlimited voice and text messaging, a $35 plan that adds web browsing, and a $45 plan that adds up to 5GB of faster 3G data. Customers can bring their own GSM device to the service by purchasing a SIM kit, or choose between an Alcatel feature phone or a low-end ZTE Android device running Gingerbread. GoSmart tells Reuters that it has already signed up "tens of thousands" of customers since early December, beating the company's projections.