Vodafone is a mobile network operator headquartered in Newbury, Berkshire, England. It is the largest mobile telecommunications company in the world based on revenue, with over £31 billion in revenue and equity interests in 25 countries. Vodafone has over 200 million customers across 5 continents, making it the second largest mobile telecom group in the world behind China Mobile. The company was founded in 1983 as Racal Telecom and became independent in 1991, choosing the name Vodafone to reflect its provision of voice and data services over mobile phones.