Forum Discussion
what does code mean
"Connection problem or invalid MMI code" What causes this message and what does it mean. Presently phone show it's dialing and it never rings the number.
If you are receiving an invalid MMI code message and confirmed that you have completed the correct code and are eligible to use the service or feature The subscriber Identification Module Card, also known as a SIM could be damaged.
If it is the carrier will replace the SIM card on your behalf. If you suspect you've got an incompatible SIM and you are unsure, go to the nearest retail store and request them to test the SIM card. You can also contact your carrier via telephone or email and request that a new one is issued to you.
