Based on a comparison of 177 countries in 2015, Macao ranked the highest in mobile phone penetration as a percentage of population with 324% followed by Kuwait and Hong Kong. On the other end of the scale was Eritrea with 7.05%, Dem. People's Republic of Korea with 12.9% and South Sudan with 23.9%.
Average mobile phone penetration as a percentage of population reached 98.3% in 2015 in the World according to World Bank. This is 1.5 % more than in the previous year and 65.5 % more than 10 years ago.
Historically, average mobile phone penetration as a percentage of population reached an all time high of 98.3% in 2015 and an all time low of < 0.001% in 1980. The average annual growth amounted to 41.4 % since 1980.
Data for more countries are available at Mobile Phone Penetration (As % of Population) indicator page.