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  2. Unstructured Supplementary Service Data - Wikipedia

    en.wikipedia.org/wiki/Unstructured_Supplementary...

    The user submits a code corresponding to the service available. USSD can be used to provide independent calling services such as a callback service (to reduce phone charges while roaming), enhance mobile marketing capabilities or interactive data services. USSD is commonly used by prepaid GSM cellular phones to query the available balance.

  3. Supplementary service codes - Wikipedia

    en.wikipedia.org/wiki/Supplementary_service_codes

    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.

  4. Mobile dial code - Wikipedia

    en.wikipedia.org/wiki/Mobile_dial_code

    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).

  5. USSD Gateway - Wikipedia

    en.wikipedia.org/wiki/USSD_Gateway

    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.

  6. GSM 03.38 - Wikipedia

    en.wikipedia.org/wiki/GSM_03.38

    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 ...

  7. How to make payments with your phone - AOL

    www.aol.com/finance/payments-phone-164336000.html

    If you are shopping in a physical store, open the Wallet app, select the card you’d like to use and hold your unlocked phone over the Tap to Pay card reader. The app will let you know once the ...

  8. What is a credit card security code? - AOL

    www.aol.com/finance/credit-card-security-code...

    A credit card security code is a three- or four-digit code that’s unique to your card. In case a merchant asks, the security code goes by a few different names , mainly the: Card Verification ...

  9. RFID skimming - Wikipedia

    en.wikipedia.org/wiki/RFID_skimming

    These scanners are legal and can be bought in regular electronics stores. Most modern mobile telephones running Android OS have a built in NFC reader that can be used to unlawfully scan contactless payment cards. A criminal can hide the scanner e.g. inside a glove or a bag, and then place it close to the victim and wirelessly steal the victim's ...