The move was announced on the official at a time when the company has revealed it is planning to expand its global footprint, with new language versions. At present, Twitter is only available in English and Japanese.
Biz Stone, Twitter co-founder, in the blog post said: "In many parts of the world people do not have internet access but they can text — and that means they can access Twitter.
"Our partnership with Bharti Airtel, the largest mobile operator in India, means a huge population of people can now send tweets at standard rates and receive tweets for free.
"There are over one billion people with Internet access on the planet but there are more than four billion people with mobile phones and Twitter can work on all of them because even the simplest of these devices feature SMS."
Stone said Twitter partnered with Bharti Airtel "because organic growth in the region has been unusually strong and there is huge potential for positive impact."
Twitter has grown rapidly in popularity since it was launched in August 2006 and now claims to have topped 50 million users.
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