Barring Code Jun 2026

: If you see an "Invalid MMI Code" error, it often means your phone has a poor connection to the tower or the carrier does not support that specific code [18].

There are several types of barcodes, including: barring code

A is a specialized Supplementary Service Code (often called MMI or USSD codes) used to restrict specific types of incoming or outgoing calls on a mobile device [13]. These codes act as a direct communication link between your handset and your mobile carrier’s network, allowing you to toggle security features without navigating complex phone menus. : If you see an "Invalid MMI Code"

In the telecommunications industry, a is a specific set of parameters or flags programmed into a network switch or database that restricts specific types of calls or services for a particular subscriber or trunk line. Functioning as a "negative permission" list, barring codes are the primary mechanism used by carriers to enforce service limitations, prevent fraud, and implement regulatory blocks (such as roaming restrictions). In the telecommunications industry, a is a specific

Barring codes are standardized across most GSM networks (like AT&T, T-Mobile, MTN, and Airtel), though some carriers may require a default network password (often 0000 ) to activate them.

Whether you are trying to prevent accidental international roaming charges or stop unwanted incoming calls, understanding these codes is essential for managing your mobile experience. Common Call Barring Codes and Their Uses