Consumers are abandoning fixed line phones in droves and replacing them with mobiles for all their voice calls, research conducted by Mori has found, reports VNU. However, the study was commissioned by Nokia. However, since the most fertile market for fixed-to-mobile substitution was found to be the young professional group, who use their mobile phone for most of their voice calls and are more likely to be male, in the middle to high income brackets, and make a large volume of voice calls, I predict life in the old phone line yet.