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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.
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 (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).
USSD gateway is based upon the ability of the delivery agent or the source to send and receive USSD messages. A USSD is a session-based protocol. A USSD is a session-based protocol. USSD messages travel over GSM signalling channels, and are used to query information and trigger services.
Phone payment apps use the same security technology as contactless credit cards (the kind you tap instead of swipe), and pay-with-phone transactions use dynamic data and tokenization to mask your ...
This works, because for characters in the Basic Multilingual Plane (including full alphabets of most modern human languages) UCS-2 and UTF-16 encodings are identical. To encode characters outside of the BMP (unreachable in plain UCS-2), such as Emoji , UTF-16 uses surrogate pairs , which when decoded with UCS-2 would appear as two valid but ...
A card security code is a three- or four-digit number on ... tapping it on a contactless payment machine or inserting it into a chip reader. Online and over-the-phone purchases where a physical ...
A vertical service code (VSC) is a sequence of digits and the signals star (*) and pound/hash (#) dialed on a telephone keypad or rotary dial to access certain telephone service features. [1] Some vertical service codes require dialing of a telephone number after the code sequence.