You can get the correct MMI code from your current service provider (see sim card information). UnlockBase only sends Sim Unlock Codes and do not personally have your MMI code information. Note: Do not mistake the MMI Code to be the same code UnlockBase has sent you.
(3) Your MMI code was sent to the wrong network. (1) You have poor signal or not getting network connection. If you are getting an invalid MMI code error, there are only three possibilities. Your service provider’s network computers then reads the code and sends the message back to your phone. The phone then checks whether the MMI code is an internal command if not, the phone then sends it to the network or your service provider. To do this, we need to examine the path that the MMI code goes to before it reaches your network.įirst, the MMI code is processed by your phone. Your network has a specific list of MMI codes they use on their own so if it returns with a “Connection Problem or invalid MMI code” message, it means that the MMI code you have used is not recognized or your phone failed to connect to your network.įixing an MMI code error is fairly easy and in order to resolve the issue, we need to isolate the probable causes. Say for example, you have sent the code *09876*54321# your phone’s MMI parser will send the “command” to the phone, and if it doesn’t recognize the code as an internal command, it will then send it to your network operator verbatim. When you dial the MMI code in your phone, it is processed by your phone’s MMI reader, and if or when it does not recognize the code, it is then sent to the network verbatim. You often use USSD codes to check your prepaid card balance.
They are also known as Quick Codes or Feature Codes, and they are used in GSM cellular telephones to communicate with their mobile network operators. MMI codes usually contain special characters such as the asterisk * and the # hash.Īmong the most common MMI codes used to communicate with your phone is *#06#, and it is the code to get your phone’s IMEI/Serial number.Īnother set of MMI codes are USSD codes. By dialing MMI codes on your phone you will be able to obtain valuable data or change phone/ sim settings you can’t access through the phone’s user interface. MMI codes or Man-Machine Codes, are special codes you dial on your phone to communicate with your phone, SIM, or with your service provider’s network operator computers. This error happens rarely on other phone brands except the Samsung Galaxy series that are dual sim, or phones that can cater two different sim cards from two different networks at the same time.īefore we hop onto the troubleshooting, let’s briefly go through the technical aspect of MMI codes.
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