"India and China added around 20 million and 40 million subscriptions respectively of the estimated 140 million net additions during Q2 2012," Ericsson said.
The mobile penetration in India has also reached 75 percent as on August 2012, while the overall penetration stood at 89 percent.
Globally, the total mobile subscriptions reached 6.3 billion. However, the actual number of subscribers is around 4.3 billion, since many have several subscriptions.
Mobile subscriptions have grown around 11 percent on year-on-year basis.
The report said there is continued strong momentum for smartphone uptake in all regions.
"Approximately 40 percent of all mobile phones sold in Q2 were smartphones, compared to around 30 percent for the full year 2011," it added.
The report said as only around 15 percent of the worldwide installed base of subscriptions are for smartphones, there is considerable room for further uptake.
Mobile broadband subscriptions have grown around 60 percent year-on-year and have reached above 1.2 billion, the report said.
Mobile data traffic doubled between Q2 2011 and Q2 2012, while the voice traffic continues to grow at a steady rate, mainly driven by new subscriptions in Asia Pacific and Middle East and Africa.