What is a mmi code?

MMI codes, also known as Man-Machine Interface codes, are a type of communication protocol used by mobile devices to interact with a carrier's network. These codes are usually entered on a phone's dial pad to access various functions and features.

Some common MMI codes include:

• *#06#: Displays the IMEI number of the device
• *#21#: Checks call forwarding settings
• *#21# + phone number: Forwards all calls to the specified number
• *#31#: Hides your caller ID when making a call
• *#43#: Checks call waiting status
• *#61#: Checks missed call notifications
• *#62#: Checks if any calls have been forwarded to another number

MMI codes can vary depending on the carrier and device, so it's a good idea to check with your service provider for a list of available codes and their functions.