Bharti Airtel also recently raised cash from Singapore Telecommunications Ltd (SingTel), which last year said it would increase its stake in the Indian telco to 31.95% from 30.43%. SingTel has an agreement to buy shares in Bharti Telecom, which is the sponsor of Bharti Airtel, in tranches till November 2010, which could mean an additional investment of up to $641.3 million.