Sometimes, a message saying “Connection problem or invalid MMI code” shows up and can be frustrating for Android users. When the invalid MMI code message appears, it generally means that you can’t ...

So to solve the Connection Problem or Invalid MMI Code issue, let’s reboot in safe mode. To reboot in safe mode or enter safe mode, follow these steps: Turn off your device. Press and hold the power ...

Array of hex numbers as answer to USSD code #107 ...

For me this meant "I was calling the #TFUNLOCK# (#83865625#)" number through/as a contact, but when I called it directly from "call history" as a number, then it ...