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The Gigabeat was first called the MobilPhile and later renamed to Gigabeat. It contained a monochrome LCD with blue backlighting, and a 5 GB removable PCMCIA hard drive. Its case was made of aluminum, and battery life is specified at 18 hours. It required music to be converted using the Toshiba Audio Application to an encrypted format.
This list contains the mobile country codes and mobile network codes for networks with country codes between 500 and 599, inclusively – a region that covers Oceania, Maritime South East Asia, and Thailand. Guam and the Northern Mariana Islands as parts of the United States are listed under Mobile Network Codes in ITU region 3xx (North America).
Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.
USSD on a Sony Ericsson mobile phone (2005). Unstructured Supplementary Service Data (USSD), sometimes referred to as "quick codes" or "feature codes", is a communications protocol used by GSM cellular telephones to communicate with the mobile network operator's computers.
Giga is a joint programme of work of two United Nations agencies, the United Nations International Children's Emergency Fund (UNICEF) and the International Telecommunication Union (ITU), with the goal of connecting all of the world's schools to the internet.
The Mobile Application Part specifications were originally defined by the GSM Association, but are now controlled by ETSI/3GPP. MAP is defined by two different standards, depending upon the mobile network type: MAP for GSM (prior to Release 4) is specified by 3GPP TS 09.02 (MAP v1, MAP v2)
USSD (Unstructured Supplementary Service Data) codes [1] are mobile dial codes that can be used for communicating with the service provider's computers (i.e. for WAP browsing, prepaid callback service, mobile-money services, location-based content services, menu-based information services, and as part of configuring the phone on the network).
ETSI and 3rd Generation Partnership Project (3GPP) standards, such as GSM and LTE, define supplementary service codes that make it possible to query and set certain service parameters (e.g., call forwarding) directly from mobile devices.