Cell: Phone Directory

: Being "in the book" was the standard for decades, serving as a primary way to connect with the community. The "Missing" Cell Phone Directory

As mobile phones gained popularity in the 1990s and early 2000s, there were attempts by wireless carriers to create a "411" style directory for cell numbers. However, these efforts failed due to: cell phone directory

: Mobile users expected their numbers to be private, viewing their cell phones as personal devices rather than public utilities. : Being "in the book" was the standard