MMI code


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MMI code

(Man Machine Interface code) A cellphone code that begins with a star/hash (*#) prefix. MMI codes are entered like telephone numbers to obtain a variety of information as well to enable and disable various actions. For example, entering *#06# on a GSM phone displays the model and serial number (see IMEI).
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This is possible because of a MMI code that allows changing a SIM card's PIN (Personal Identity Number) number using the PUK (Personal Unblocking Key), Collin Mulliner, a mobile security researcher who works in the SECLAB at Northeastern University in Boston, said Tuesday via email.