If Marc Zuckerberg has his way, Facebook will become the “on ramp” for the two-thirds of the world’s population not yet connected to the Internet. “We want to create a similar dial tone for the Internet,” Zuckerberg said, comparing basic online service to using a landline phone during a keynote speech at Mobile World Congress in Barcelona Monday. Zuckerberg’s remarks focused on Internet.org, a collaborative effort among telecommunications carriers, Facebook and other groups to provide free or inexpensive Internet access. Facebook announced the project last August. The issue, Zuckerberg said Monday, is not a lack of infrastructure, at least in areas near major cities. More than 80 percent of people worldwide have 2G or 3G access, Zuckerberg said. But the problem is that many people do not understand why they would want the Internet, or what to do with it, Zuckerberg said.