The global handset installed base will grow by 3% in 2018. Asia Pacific has the largest installed base by some margin, while Western Europe has the highest population penetration. Countries with major installed bases include China, United States, UK, Nigeria, India, Brazil and Russia. This extensive report forecasts the global handset installed base by 6 major regions and 88 countries from 2002 to 2023. It forecasts handset population penetration and handset installed base. The report is a valuable tool for content developers, car makers, component vendors, operators and other stakeholders to measure the world's installed base of mobile phones by size, growth and penetration.