What is an mmi code?

An MMI code, or Man-Machine Interface code, is a sequence of digits that can be entered into a mobile device to perform certain actions or access specific features. These codes are typically used to interact with a mobile network or service provider and are commonly used to check account balances, activate or deactivate services, or access additional settings.

MMI codes are often used to perform tasks that are not readily accessible through the device's user interface or settings menu. They are entered into the dialer of a mobile device just like a phone number, usually starting with an asterisk (*) and ending with a hash (#) symbol.

Some common examples of MMI codes include:

• *#06#: Displays the IMEI (International Mobile Equipment Identity) number of the device.
• *#21#: Checks call forwarding settings on the device.
• *#62#: Checks call forwarding settings for when the device is unreachable.
• *#31#: Allows the user to hide their caller ID when making a phone call.
• *#123#: Accesses the device's voicemail service.

It is important to note that not all MMI codes work on all devices or networks, and some codes may require additional permissions or credentials to be entered. It is recommended to consult with the mobile network provider or manufacturer for information on specific MMI codes that can be used with a particular device.