When your phone powers back up, the error should disappear. You can also use the search icon and type ‘Reset’ to skip step 2. Open the Settings on your Android device.Performing a network reset will clear any problem codes and help you start fresh. Perhaps your network settings haven’t updated properly or there’s a glitch in the system. Reset Your Network Settingsīecause we know that the MMI error indicates an issue with your device’s cellular connection, the next logical step is to reset your Network Settings. Given that an MMI Code error can occur due to weak signal strength performing this can reset your connection and correct the error. Wait about 10-30 seconds, and then turn Airplane Mode to Off.Go to Settings and turn Airplane Mode to On.Some users have had success using Airplane Mode to resolve their MMI code error issues. Keep doing this until the MMI code ceases. Then, power your phone out of Safe Mode and see if the error appears. When you follow the Settings>Apps path scroll down and uninstall any apps you believe may be the culprit. Start with the applications you installed around the time you started seeing the error. You’ll need to start removing third-party apps. If your phone doesn’t throw any error codes, third-party software is interfering with your network. Now, use your phone in Safe Mode for a bit to see if the MMI error appears.Tap Safe Mode from the menu that appears.

You can do this by holding the power button (button combination) on your Android device. It’s possible that third-party software is interferring with your connection and causing an MMI error. Alternatively, press and hold the Power Button until the Shutdown options menu appears, and then select Restart.Hold the Power button and the Home button at the same time until the phone turns off and starts vibrating wait for it to restart.The first way to try to fix an invalid MMI code would be to restart the smartphone. We’ll cover them from the simplest method up to the more complicated ones. Several methods exist to fix the “Connection problem or invalid MMI code” on an Android device.

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