Mobile device ownership has reached critical mass globally, though there are differences in device types between countries. Smartphones are most popular in places like South Korea, the UK, and US, while feature phones still dominate in India, Brazil, and Russia. Younger consumers are more likely to own smartphones worldwide. The cost of mobile plans, especially data plans, varies significantly between countries, with plans in places like India and Russia being more expensive relative to average incomes. Many consumers in high-growth markets rely on pay-as-you-go data or public WiFi instead of full service plans.