India and its burgeoning mobile market may be Twitter's answer to reviving user growth on the social media service.
"There are more smartphones in India than they are in America today," Valerie Wagoner, who recently sold her Indian mobile start-up Zipdial to Twitter, told CNBC's Worldwide Exchange on Thursday.
Twitter purchased ZipDial for a reported $40 million earlier this year. The company allows users to dial a toll-free number and receive tweets from the person they want to follow via SMS text message. Sending a missed call is a popular and low-cost way to communicate in India and other emerging markets like Indonesia.
Only 1 in 4 people have a phone in India, according to Wagoner, and most Indians do not have a data plan, making it challenging for social media companies and advertisers to push their content and products to consumers through modern channels. This is why Wagoner said her 'missed call' technology is key.