Mobile connections in India will grow to 815 million in 2014, an 8% increase from 755 million connections in 2013, according to Gartner.

The mobile services market in India will remain almost at the same level as 2013 at USD 19.2 billion in 2014, Gartner added.

"The mobile market in India is going through a rough patch, where voice average revenue per user (ARPU) is falling very fast, and the increase in data ARPU is not able to fully compensate for the decline," said Neha Gupta, senior research analyst at Gartner.

"If the prevailing market conditions do not change in the Indian mobile market, India will account for 12% worldwide mobile connections, but just 2% of worldwide mobile services revenue."

One of the biggest challenges faced by Indian mobile operators is the growing appetite for over-the-top (OTT) voice services. Explosion in personal connected devices, such as smartphones and tablets, is driving consumer appetite for OTT communication.

"Mobile broadband provides a substantial revenue opportunity in India on the back of low fixed line broadband penetration. Packing and selling mobile broadband in small and affordable chunks is critical to uptake," said Gupta.