South Korea (the Republic of Korea) has the highest percentage out of ten countries in the List of countries by 4G LTE penetration
1 South Korea 97.5% 2 Japan 96.3% 3 Norway 95.5% 4 Hong Kong 94.1% 5 United States 93.0% 6 Netherlands 92.8% 7 Taiwan 92.8% 8 Hungary 91.4% 9 Sweden 91.1% 10 India 90.9% 
