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 ...

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 ...