The invalid MMI code error on Huawei phone is really painful to endure. While it is generally annoying to see any error on your Android smartphone, this error won’t ...

If you are an Android smartphone user, many times you have come across a message like 'Connection problem or invalid MMI Code' on dailing a USSD code. It's a serious problem which affects the phones ...

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 ...

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 ...

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