As part of its plans to "partner with organizations that share our vision for positive global impact", Twitter has announced a partnership with Bharti Airtel, the largest mobile operator in India.

This team-up means a "huge population" of people can now send tweets at standard rates and receive tweets for free and sees Twitter available via phone to those that might not have broadband.

Twitter says "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".

Those on the Airtel network can give Twitter a try by sending START to 53000.