Utilize the input text as a context reference, choose the right relationship between Bharti Airtel and Vodafone from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Jio won 4G mobile airwaves in 2010 and is expected to start nationwide commercial services by end of this year, joining leading Indian carriers Bharti Airtel Ltd and Vodafone Group Plc's India unit.

Answer: owned_by