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USSD is commonly used by prepaid GSM cellular phones to query the available balance. The vendor's "check balance" application hides the details of the USSD protocol from the user. On some pay as you go networks, such as Tesco Mobile, once a user performs an action that costs money, the user sees a USSD message with their new balance.
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.
In mobile telephony GSM 03.38 or 3GPP 23.038 is a character encoding used in GSM networks for SMS (Short Message Service), CB (Cell Broadcast) and USSD (Unstructured Supplementary Service Data).
The reason why USSD is commonly used is because it enhances the WCDMA signalling and multiplexes the coherent signals. Types of applications. Balance Check: the user can send a Process Supplementary Service request (PSSR) to the home zone, which will forward this, under guidance from the gateway, to the correct application.
This list contains the mobile country codes and mobile network codes for networks with country codes between 300 and 399, inclusively – a region that covers North America and the Caribbean. Guam and the Northern Mariana Islands are included in this region as parts of the United States.
To check your account balance at an ATM, insert your debit or ATM card, enter your Personal Identification Number (PIN) and select “balance inquiry” or a similar option.
The National Unified USSD Platform (NUUP), also known as the *99# service, is a platform that provides access to the Unified Payment Interface (UPI) service over the USSD protocol. Initiated by the Government of India and developed by the National Payments Corporation of India (NPCI), it facilitates access to banking services from mobile phones.
Apart from various third-party apps such as Google Pay (previously Tez), PhonePe, Paytm, Amazon Pay, Airtel Payments Bank, MobiKwik, Samsung Pay, WhatsApp Pay, [68] NPCI manages its own app, BHIM. [69] The total number of banks linked to UPI platform grew from 21 in April 2016 to 304 in February 2022. [70]