This graphic from So Mobile is very interesting because it clearly shows the top countries according to the percentage of mobile phone ownership, but worryingly it also shows that there are many countries with little or no mobile phone ownership at all. In this case, we assume that the percentage of ownership when compared with population is fairly low, but it seems to include Scandinavia!
Anyway, from this research we can see that the top three countries here are China, India and the USA, which is no real surprise because of the numbers of people involved here! It seems that Europe needs to try a lot harder.
Source [Daily Infographic]