India is expected to add 206 million new subscribers by 2020 while China is expected to add another 155 million subscribers.
About one-third of total global mobile subscribership are from the world's two most populous nations — China and India – and the number will continue to grow in the next few years, according to a study by GSMA. The study said India will add more new mobile subscribers than China over the next four years and hinted at a continuation of the trend.
“We expect India to overtake the US next year as the second-largest smartphone market by units. India will grow nearly five times faster than the world’s largest smartphone market China, where growth has decelerated,”
The study titled "The Mobile Economy: Asia Pacific 2017" by GSMA said that Asia Pacific, which has been the biggest contributor to global subscriber growth in recent years, will continue to witness growth till the end of the decade. There were 2.7 billion unique subscribers in the region by the end of the 2016 and about 460 million are expected to be added by 2020, taking the total to 3.1 billion which is three-quarters of the population. The region accounts for more than half the world's mobile subscribers.