India 's telecommunication industry , the world 's fastest - growing , added 227 million subscribers during the period 2010 -- 11 .
After the third quarter of 2017 , India surpassed the US to become the second largest smartphone market in the world after China .
India 's telecommunication industry , the world 's fastest - growing , added 227 million subscribers during the period 2010 -- 11 , and after the third quarter of 2017 , India surpassed the US to become the second largest smartphone market in the world after China .