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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.
USSD Phase 1, as specified in GSM 02.90, only supports mobile-initiated ("pull") operations. [8] In the core network, the message is delivered over MAP, USSD Phase 2, as specified in GSM 03.90. [9] After entering a USSD code on a GSM handset, the reply from the GSM operator is displayed within a few seconds.
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.
Roaming fees are typically charged on a per-minute basis for wireless voice service, per text message sent and received and per megabyte of data used for data service, and they are typically determined by the service provider's pricing plan.
At the highest transfer bracket of KSh50,001–70,000, the fee for a transfer to a registered user is KSh110 (US$1) or 0.16–0.22 %. The maximum amount that can be transferred to a non-registered user of the system is KSh35,000 (US$319.23), with a fee of KSh275 (US$2.51) or 0.8%. Cash withdrawal fees are also charged.
However, Vodafone UK appealed this decision to the Competition Appeal Tribunal (CAT), which ruled in favor of Vodafone on 18 September 2008, returning the matter to Ofcom for reconsideration. On 8 July 2010, Ofcom issued a final statement retaining the donor-led process, mandating a two-hour PAC release time, and reducing the porting time from ...
TADIG code is a number uniquely identifying network operators in a GSM mobile network. The acronym TADIG expands to " Transferred Account Data Interchange Group ". According to the GSM specification, the codes are used as "primary identifiers within file contents and file names" in multiple file formats defined by the GSMA . [ 1 ]
This list contains the mobile country codes (MCC) and mobile network codes (MNC) for networks with country codes between 200 and 299, inclusive. This range covers Europe, as well as: the Asian parts of the Russian Federation and Turkey; Georgia; Armenia; Greenland; the Azores and Madeira as parts of Portugal; and the Canary Islands as part of Spain.