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Unstructured Supplementary Service Data (USSD), sometimes referred to as "quick codes" or "feature codes", is a communications protocol used by GSM cellular telephones to communicate with the mobile network operator's computers.
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.
GSM USSD codes - Unstructured Supplementary Service Data: list of standard GSM codes for network and SIM related functions; External links. 3GPP TS 22.030;
Call forwarding can be Conditional or Unconditional. Conditional call forwarding only works when the conditions set by the customers met while Unconditional call forwarding works in all cases irrelevant of network coverage. In Europe, most networks indicate that unconditional call forwarding is active with a special dial tone. When the phone is ...
What happens after an executive order is signed? After a president signs an executive order, the White House sends the document to the Office of the Federal Register, the executive branch's ...
USSD, PTT, concatenated/E-sms are not supported by IS-95/CDMA; IS-95 covers a smaller portion of the world, and IS-95 phones are generally unable to roam internationally. Manufacturers are often hesitant to release IS-95 devices due to the smaller market, so features are sometimes late in coming to IS-95 devices.
The funding went to everything from women's health in conflict zones to clean water, HIV/AIDS treatments, energy security and anti-corruption work. USAID had a staff of more than 10,000 people.
Meta is denying claims circulating on social media that it forced Facebook and Instagram users to follow President Trump 's official accounts, saying the changes some users noticed were standard ...