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USSD on a Sony Ericsson mobile phone (2005). 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.
To make blocklisting effective, the IMEI number is supposed to be difficult to change. However, a phone's IMEI may be easy to change with special tools. [10] [better source needed] In addition, IMEI is an un-authenticated mobile identifier (as opposed to IMSI, which is routinely authenticated by home and serving mobile networks.) Using a ...
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.
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.
To manage and recover your account if you forget your password or username, make sure you have access to the recovery phone number or alternate email address you've added to your AOL account. If you know your username but need to reset your password, make sure you create a strong password after you're back in your account.
The Multi Media Interface (MMI) system is an in-car user interface media system developed by Audi, and was launched at the 2001 Frankfurt Motor Show on the Audi-Avantissimo concept car. [1] Production MMI was introduced in the second generation Audi A8 D3 in late 2002 and implemented in majority of its latest series of automobiles.
Cross-connect box (left) and VRAD (right) on a suburban street in Houston, Texas.. A video-ready access device (VRAD) provides digital subscriber line access and high-definition television programming to customers subscribed to IPTV services such as AT&T's U-verse, Bell Canada's Bell Fibe TV, Claro Puerto Rico's Claro TV, and Telus's Optik TV.
DirecTV Stream (formerly DirecTV Now and AT&T TV) is a premium streaming multichannel television service offered in the United States by DirecTV.. The brand offers pay television service without a contract, with the service utilizing a customer's existing streaming TV hardware, such as a Roku or Amazon Fire TV device, and is also available on some smart TV systems like Tizen OS by Samsung ...