Rich Ling is a sociologist at Telenor's research institute near Oslo, Norway and has been Pohs Visiting Professor of Communication at the University of Michigan, Ann Arbor. He is the author of New Tech, New Ties: How Mobile Communication is Reshaping Social Cohesion and The Mobile Connection: The Cell Phone's Impact on Society. Scott W. Campbell is assistant professor and Pohs Fellow of Telecommunications in the Department of Communication Studies at the University of Michigan. His research has been published in the journals Communication Education, Communication Monographs, International Journal of Communication, Journal of Applied Communication Research, New Media & Society, and others.

• Introduction The Reconstruction of Space and Time through Mobile Communication Practices; 1: Tailing Untethered Mobile Users: Studying Urban Mobilities and Communication Practices; 2: Migrant Workers and Mobile Phones: Technological, Temporal, and Spatial Simultaneity; 3: Portable Objects in Three Global Cities: The Personalization of Urban Places; 4: New Reasons for Mobile Communication: Intensification of Time-Space Geography in the Mobile Era; 5: Nonverbal Cues in Mobile Phone Text Messages: The Effects of Chronemics and Proxemics; 6: Mobile Phones: Transforming the Everyday Social Communication Practice of Urban Youth; 7: Trust, Friendship, and Expertise: The Use of Email, Mobile Dialogues, and SMS to Develop and Sustain Social Relations in a Distributed Work Group; 8: Negotiations in Space: The Impact of Receiving Phone Calls on the Move; 9: Mobile Phone Work: Disengaging and Engaging Mobile Phone Activities with Concurrent Activities; 10: Beyond the Personal and Private: Modes of Mobile Phone Sharing in Urban India; Conclusion Mobile Communication in Space and Time Furthering the Theoretical Dialogue

Rich Ling is a sociologist at Telenor's research institute near Oslo, Norway and has been Pohs Visiting Professor of Communication at the University of Michigan, Ann Arbor. He is the author of New Tech, New Ties: How Mobile Communication is Reshaping Social Cohesion and The Mobile Connection: The Cell Phone's Impact on Society. Scott W. Campbell is assistant professor and Pohs Fellow of Telecommunications in the Department of Communication Studies at the University of Michigan. His research has been published in the journals Communication Education, Communication Monographs, International Journal of Communication, Journal of Applied Communication Research, New Media & Society, and others.

• Introduction The Reconstruction of Space and Time through Mobile Communication Practices; 1: Tailing Untethered Mobile Users: Studying Urban Mobilities and Communication Practices; 2: Migrant Workers and Mobile Phones: Technological, Temporal, and Spatial Simultaneity; 3: Portable Objects in Three Global Cities: The Personalization of Urban Places; 4: New Reasons for Mobile Communication: Intensification of Time-Space Geography in the Mobile Era; 5: Nonverbal Cues in Mobile Phone Text Messages: The Effects of Chronemics and Proxemics; 6: Mobile Phones: Transforming the Everyday Social Communication Practice of Urban Youth; 7: Trust, Friendship, and Expertise: The Use of Email, Mobile Dialogues, and SMS to Develop and Sustain Social Relations in a Distributed Work Group; 8: Negotiations in Space: The Impact of Receiving Phone Calls on the Move; 9: Mobile Phone Work: Disengaging and Engaging Mobile Phone Activities with Concurrent Activities; 10: Beyond the Personal and Private: Modes of Mobile Phone Sharing in Urban India; Conclusion Mobile Communication in Space and Time Furthering the Theoretical Dialogue