Boost Mobile is a brand of wireless

Wireless

Wireless telecommunications is the transfer of information between two or more points that are not physically connected. Distances can be short, such as a few meters for television remote control, or as far as thousands or even millions of kilometers for deep-space radio communications...

 prepay service run by Sprint Nextel

Sprint Nextel

Sprint Nextel Corporation is an American telecommunications company based in Overland Park, Kansas. The company owns and operates Sprint, the third largest wireless telecommunications network in the United States, with 53.4 million customers, behind Verizon Wireless and AT&T Mobility...

, operating within the Sprint Prepaid Group along with Virgin Mobile USA

Virgin Mobile USA

Virgin Mobile USA, Inc. is a wireless communications services provider based in Warren, New Jersey, United States. Founded in 2001 as a mobile virtual network operator, Virgin Mobile USA, Inc. commenced operations under the Virgin Mobile brand in June, 2002...

, Assurance Wireless, and payLo by Virgin Mobile. Boost Mobile uses GSM
and iDEN

Iden

For other uses of the word, see Iden The Iden was an English automobile manufactured from 1904 until 1907. Designed by George Iden, formerly of Daimler, they were four-cylinder 10/17 hp and 25/35 hp shaft-driven cars; each came with "Idens's frictionless radial gearbox"....

 networks. It was originally launched in Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

, over Optus

Optus

SingTel Optus Pty Limited is the second largest telecommunications company in Australia, and is a wholly owned subsidiary of Singapore Telecommunications...

, in 2000, and in New Zealand

New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

, over Telecom New Zealand

Telecom New Zealand

Telecom New Zealand is a New Zealand-wide communications service provider , providing fixed line telephone services, a mobile network, an internet service provider , a major ICT provider to NZ businesses , and a wholesale network infrastructure provider to other NZ CSPs...

, in 2001.
Boost Mobile is run on both Sprint's CDMA network and Nextel's iDEN

Integrated Digital Enhanced Network

Integrated Digital Enhanced Network is a mobile telecommunications technology, developed by Motorola, which provides its users the benefits of a trunked radio and a cellular telephone...

 network. Boost Nationwide Unlimited (AKA Monthly Unlimited Plan), which differs from their previous UNLTD plans, is offered for iDEN

Integrated Digital Enhanced Network

Integrated Digital Enhanced Network is a mobile telecommunications technology, developed by Motorola, which provides its users the benefits of a trunked radio and a cellular telephone...

 handsets as of January 22, 2009 and CDMA as of January 2010.