My wife has for years used Virgin Mobile USA as her mobile phone service provider.
The two new Indian entrants are Sunil Mittal of the Bharti group, a leading mobile phone service provider in India, and Anil Agarwal of Sterlite industries.
"The bulk of our sales come from the 60 and 25 cents-valued phone cards and this is because the people who buy them depend on a daily income, " said a senior marketer at Safaricom, a leading mobile phone service provider in Kenya.
CNN: Small is beautiful: Slum traders spark big business trend
Hutheesing also notes that Li Ka-Shing is Hong Kong's largest provider of mobile phone service and one of its largest real estate developers.
New ways of dealing with micro-payments are emerging, such as by deduction from a prepaid account with a computer company, Internet-service provider or mobile-phone company.
In a country of 4m, there is a waiting list of 100, 000 for a mobile-phone number, and only one Internet service provider.
North Korean mobile phone provider Koryolink is planning to launch a 3G data service for foreign visitors and residents from abroad.
Touting itself as the industry's "first smart mobile provider, " Zact takes an entirely different tact to cell phone service, offering the consumer total control over voice, text and data plans, even across multiple devices.
Mobile phone provider Three says it will not charge customers extra to upgrade to the 4G data service.
Like a mobile phone, it can even be carried around and used from other points within radio range of a service provider's base-station.
Uzbekistan's largest mobile phone provider has been stripped of its licence in a case which has left millions of users without service.
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