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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.
The Type Allocation Code (TAC) is the initial eight-digit portion of the 15-digit IMEI and 16-digit IMEISV codes used to uniquely identify wireless devices. The Type Allocation Code identifies a particular model (and often revision) of wireless telephone for use on a GSM , UMTS , LTE , 5G NR , iDEN , Iridium or other IMEI-employing wireless ...
In 2023, Vivo was ranked among the top 5 smartphone makers, achieving a global market share of 10%. [12] In April 2021, three pallets of Vivo phones [13] caught fire at Hong Kong International Airport, prompting a ban on air freight of Vivo phones through Hong Kong. [14] In June 2022, Vivo entered the world-famous Guinness Book of Records. [15]
This is the list of mobile phone brands sorted by the country from which the brands originate. The number of mobile phone brands peaked to more than 750 in 2017 before declining to nearly 250 brands in 2023. [1] Bold refers to major smartphone brand. [2] [3]
This list contains the mobile country codes and mobile network codes for networks with country codes between 700 and 799, inclusively – a region that covers South and Central America. The Falkland Islands are included in this region, while the Caribbean is listed under Mobile Network Codes in ITU region 3xx (North America).
The Vivo brand was launched on 13 April 2003, as a mobile phone service provider. It's the largest provider in Brazil with over 76 million users. [ 3 ] It originated from the merger of several Brazilian mobile phone operations under a joint-venture owned equally by Portugal Telecom (PT) and Spain's Telefónica .
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).