Facebook is acquiring Pryte, a Finnish company that aims to make it easier for mobile phone users in under-developed parts of the world to use wireless Internet apps. Facebook did not disclose financial terms of the deal, which spokeswoman Vanessa Chan said is expected to close later this month. Pryte’s service, which has not publicly launched yet, seeks to make it easier for consumers without wireless data plans to use online services by selling short-term passes that would provide access to particular mobile apps, such as Facebook or Foursquare. Facebook, the world’s largest social network with 1.28 billion users, is primarily interested in the team behind Pryte, led by Chief Executive Markku Makelainen, Chan said. The one-year old, Helsinki-based company has valuable experience and relationships working with wireless operators, particularly in emerging markets, she said.