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