NetZero has officially rolled out a new broadband service that travels over Sprint’s 3G network. As of Wednesday, the service is available to the 276 million people that Sprint reaches through its 3G coverage. And for those of you unhappy with 3G access, an upgrade to Sprint’s 4G LTE network is scheduled for the third quarter of this year.

Remember NetZero? The company that made a name for itself by providing free ad-supported ISP service back around the end of the Clinton administration? Well, in recent years, it’s reinvented itself as a mobile broadband service. On Wednesday, NetZero announced an agreement with Sprint in which it will provide access over Big Yellow’s 3G infrastructure, with a promise to offer access to the carriers’ 4G LTE network later in 2014.