There is widespread agreement as to what constitutes leapfrogging in technology and also that mobile phones are a good example of this phenomenon. What is lacking in the literature, however, is any attempt to operationalize the notion of leapfrogging in a way that allows us to rank different countries. The purpose of this paper accordingly is to provide such a measure using both the ratio of mobile to fixed telephones and a weighting of this ratio for a particular country by its share in the total number of mobile phones in the sample. The proposed measure yields a number of insights that cannot be gained by using only the ratio of mobile to fixed telephones. Yet, for a number of the best performing countries this ratio is very much in evidence.