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valid just for the next call; no final # # 31 # number * 31 # number: 330 total incoming and outgoing service barring password is network dependent, default on some networks is 0000 * 330 * password * BS # # 330 * password * BS # * # 330 * * BS # 33 outgoing call barring password is network dependent, default on some networks is 0000 * 33 ...
Call forwarding. Barring of Outgoing Calls. Barring of Incoming Calls. Advice of Charge (AoC). This GSM service estimates the call cost for display on the user's mobile phone. [1] This helps users by preventing bill shock [2] and reduces the load on the mobile network operator's customer service department. However, in practice, this GSM ...
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.
Connecting outgoing calls to other mobile subscribers or the PSTN. Delivering SMSs from subscribers to the short message service center (SMSC) and vice versa. Arranging handovers from BSC to BSC. Carrying out handovers from this MSC to another. Supporting supplementary services such as conference calls or call hold. Generating billing information.
Fixed Dialing Number (FDN) is a service mode of a GSM mobile phone's SIM card. [1] Numbers are added to the FDN list, and when activated, FDN restricts outgoing calls to only those numbers listed, or to numbers with certain prefixes. [1]
Quick Take: List of Scam Area Codes. More than 300 area codes exist in the United States alone which is a target-rich environment for phone scammers.
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).
181 Call is Being Forwarded Servers can optionally send this response to indicate a call is being forwarded. [1]: §21.1.3 182 Queued Indicates that the destination was temporarily unavailable, so the server has queued the call until the destination is available. A server may send multiple 182 responses to update progress of the queue.