How to Fix ‘Connection Problem or Invalid MMI Code’ Error on Android

MMI codes are special sequences of numbers that start with a star (*) or hash (#) and are used to access various functions or information on your smartphone. For example, entering *#06# on a GSM phone will display the model and serial number of the phone.

There are different types of MMI codes, such as SS codes, USSD codes, Manufacturer MMI codes, and SIM control codes.

Sometimes, you may encounter an invalid MMI code error, which means that the code you entered is not recognized by your phone or network

So if you haven’t been able to utilize MMI codes due to annoying errors, here are some fixes in this video that you can try and use to solve the MMI code errors that you face on your Android.

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When I try to do it there is no comma on my dial.

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If i recharhe why complete mmi code asking