Call Barring Settings Exclusive 【FHD · UHD】

1. Executive Summary Call barring is a network-based service that allows users to restrict specific types of outgoing or incoming calls on a mobile or fixed line. Unlike call forwarding or caller ID, call barring actively prevents connections based on predefined rules. This report covers the technical definitions, standard settings, activation methods, use cases, and limitations of call barring. 2. Technical Definition Call barring works at the network level (HLR/VLR in GSM/UMTS, or IMS in LTE/5G). When a user attempts a call, the network checks barring conditions before routing. If a condition matches (e.g., international outgoing), the network rejects the call with an appropriate announcement or error tone.

3GPP TS 22.088 (Call Barring supplementary services) 3. Standard Call Barring Settings (GSM/3GPP) The following are the universal call barring codes (feature codes) used across most networks: call barring settings

| Setting | Description | Standard Code | |---------|-------------|----------------| | | Bar All Outgoing Calls | **33*password# | | BOIC | Bar Outgoing International Calls | **331*password# | | BOIC-exHC | Bar Outgoing International except Home Country | **332*password# | | BAIC | Bar All Incoming Calls | **35*password# | | BIC-Roam | Bar Incoming Calls when Roaming | **351*password# | | BAIC-all | Bar All Incoming Calls (variant) | **353*password# | | All outgoing (summary) | Includes BAOC, BOIC, BOIC-exHC | N/A | | All incoming (summary) | Includes BAIC, BIC-Roam | N/A | When a user attempts a call, the network