A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks. This is in contrast to a phone that does not impose any SIM restrictions.
KDDI Corporation is a Japanese telecommunications operator. It was established in 2000 through the merger of DDI, KDD (ケイディディ), and IDO. In 2001, it merged with a subsidiary named Au, which was formed through the merger of seven automotive and mobile phone companies from the DDI-Cellular Group. As of 2020, it is the second-largest mobile telecommunications provider in Japan in terms of the number of contracts, following NTT Docomo.
A mobile virtual network operator (MVNO) is a wireless communications services provider that does not own the wireless network infrastructure over which it provides services to its customers. An MVNO enters into a business agreement with a mobile network operator to obtain bulk access to network services at wholesale rates, then sets retail prices independently. An MVNO may use its own customer service, billing support systems, marketing, and sales personnel, or it could employ the services of a mobile virtual network enabler (MVNE).
Virgin Mobile is a wireless communications brand used by seven independent brand-licensees worldwide. Virgin Mobile branded wireless communications services are available in the United Kingdom, Ireland, Canada, Colombia, Chile, Kuwait, Saudi Arabia, United Arab Emirates, Poland and Mexico. Virgin Mobile branded services used to be offered in Australia, France, Singapore, India, Qatar, South Africa and the United States.
Fido Solutions Inc. is a Canadian mobile network operator owned by Rogers Communications. Since its acquisition by Rogers in 2004, it has operated as a Mobile virtual network operator (MVNO) using the Rogers Wireless network.
TracFone Wireless, Inc. (TFWI) is an American prepaid, no-contract mobile phone provider. TFWI is a subsidiary of Verizon Communications, and offers products and services under several brands. It operates as a mobile virtual network operator (MVNO), holding agreements with the three largest United States wireless network operators to provide service: AT&T Mobility, T-Mobile US, and Verizon.
Sprint Corporation was an American telecommunications company. Before being acquired by T-Mobile US on April 1, 2020, it was the fourth-largest mobile network operator in the United States, serving 54.3 million customers as of June 30, 2019. The company also offered wireless voice, messaging, and broadband services through its various subsidiaries under the Boost Mobile and Open Mobile brands and wholesale access to its wireless networks to mobile virtual network operators.
Leap Wireless International, Inc. was a telecommunications operator that provided wireless services to approximately 4.6 million subscribers, the 5th largest, through its subsidiary, Cricket Communications, Inc.. It was headquartered in San Diego, California. Leap Wireless and Cricket Wireless are now subsidiaries of AT&T.
Lively is a connected health technology company based in the United States of America.
KDDI Mobile was a mobile phone service operated in the United States. The brand was established under KDDI America – local branch of Japanese telecommunication company KDDI – to meet the needs of Japanese people living in the United States. The service originally operated on the Sprint network, and later on AT&T, as an MVNO. Initially targeting Japanese expatriates, they offered the Japanese-enabled KDDI Mobile 6600-J handset, and their plan minutes included calls to Japan.
Kroger Wireless LLC is an American mobile virtual network operator providing domestic telecommunications services via the T-Mobile Network. The brand was launched as i-wireless, a Kroger Co. It was trialed in 130 Kroger stores in 2006, before being rolled out by mid-2008 to over 2,200 locations, including banner stores such as Dillons, Ralphs, Fred Meyer, and Fry's Food and Drug. Unique among US wireless operators, i-wireless created a loyalty offer allowing customers the ability to earn Wireless Rewards on select plans when using their shopper's loyalty card on in-store qualifying purchases. In May 2019, the company announced the name of its prepaid product brand changing from "i-wireless, a Kroger Co." to "Kroger Wireless."
Page Plus Cellular is a prepaid mobile virtual network operator in the United States operated by TracFone Wireless, Inc. using Verizon’s wireless network, subsidiary of Verizon Communications.
The Japanese mobile phone industry is one of the most advanced in the world. As of March, 2022 there were 199.99 million mobile contracts in Japan according to the Ministry of Internal Affairs and Communications. This is 158 percent of Japan's total population.
Republic Wireless was an American mobile virtual network operator (MVNO). Republic sold low cost mobile phone service on partner networks. Republic started as a unique company that provided customers with VOIP numbers which relied on WiFi first with cell as a backup.
Mobi, Inc. is a wireless carrier founded in 2004 and based in Honolulu, Hawaii. The company provides service on each of the major islands of Hawaiʻi. The company is an operator member of the GSMA, the Competitive Carriers Association, and the Pacific Telecommunications Council.
US Mobile is an American mobile virtual network operator (MVNO) that uses the T-Mobile and Verizon Wireless networks to provide talk, text, and data services to their customers.
Ting Mobile is an American mobile virtual network operator owned by Dish Wireless. Originally established in February 2012 by Tucows, Ting provides cellular service in the United States using the T-Mobile and Verizon networks. The service is sold off-contract with billing that adjusts the cost of service based on actual customer usage.
