Fourth generation Long Term Evolution network smartphones represented 58 percent of global smartphone sales in the second quarter of 2015, up from 26 percent in the second quarter of 2014, according to research firm GfK.
LTE-based smartphone unit growth was 129 percent year over year.
"India is expected to be the largest contributor of absolute smartphone unit growth globally this year,” said Kevin Walsh, GfL director of trends and forecasting.
In the second quarter of 2015, smartphone sales value grew eight percent over last year while unit sales grew by six percent.
In China, high-end device demand increased 49 percent year over year in the second quarter of 2015, though overall LTE device sales fell 10 percent.