Telephone directory; A sampling of mobile virtual network operators.(Sprint Nextel Corp.)(TracFone Wireless)(Virgin Mobile USA L.L.C.)(Brief article)

Advertising Age, August, 2006

TracFone Wireless

Number of subscribers: 6.1 million;

Carrier: Multiple carriers

Comment: This subsidiary of America Mcentsvil, Latin America's largest mobile-phone provider, counts Wal-Mart as one of its largest distributors.

Virgin Mobile USA

Number of subscribers: 4 million

Carrier: Sprint Nextel Corp.

Comment: Prepaid and other hybrid offerings proved the viability of virtual phone services. Innovations include "Sweet Mama,'' a program offering free minutes to customers viewing ads or completing marketers' surveys.

Boost Mobile

Number of subscribers: 3.13 million

Carrier: Sprint Nextel Corp.

Comment: This Sprint Nextel subsidiary was exported to the U.S. in 2002....

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