Facebook is overhauling its Pages service with features for wireless devices that help users quickly find business information, another sign the company is ramping up efforts in mobile.

The revamp, the most extensive in a year, is the first Pages upgrade to begin on mobile instead of the desktop version, said Matt Idema, head of product marketing for Pages. The updates, which highlight business information such as addresses and hours of operation, will appear first on the applications for Apple Inc.’s iPhone and mobile Web version.