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 ...

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 ...

If the Connection Problem or Invalid MMI Code problem is driving you nuts, we got a few solutions that should solve your issue.

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 ...