Allen & Overy has advised Indian telecommunication giant Bharti Airtel Ltd. on a $2 billion dual-currency bond offering.

Through a wholly-owned subsidiary, Bharti Airtel International (Netherlands) B.V., the company sold the bonds in two tranches: $1 billion in 10-year dollar-denominated notes and $1 billion in seven-year euro-denominated notes. Proceeds will be used to refinance Bharti Airtel’s current debt.

New Delhi-based Bharti Airtel is the world’s second largest mobile telecommunication provider, operating in 20 countries in South Asia and Africa.

Hong Kong partner Partner Amit Singh led a team at Allen & Overy advising Bharti Airtel.

Singapore partner Naomi Ishikawa led a team at Milbank, Tweed, Hadley & McCloy representing underwriters Barclays Bank plc, BNP Paribas, Hongkong And Shanghai Banking Corp. Ltd., Standard Chartered Bank, JP Morgan Securities plc. and Bank of America Merrill Lynch. Axon Partners New Delhi partner Abhimanyu Bhandari acted as the banks’ Indian counsel.

Allen & Overy and Milbank also advised Bharti Airtel on a $1 billion dollar-denominated bond issue in March 2013 and a $1 billion euro-denominated notes offer last December.