How to Fix Invalid MMI Code?

Many times while using your phone when you enter a USSD code, you get a message like a connection problem or invalid MMI Code. It is quite common when you run a USSD Code to check your data balance. It’s a significant issue which influences the telephones bringing about monumental a few limitations while sending and receiving text messages and calls, checking account balance, recharging mobile number, etc.

What Does Invalid MMI Code Mean?

Before knowing the invalid MMI code, you must understand what MMI code is. MMI Code resembles Man-Machine Interface. Whenever you enter a code in your phone that starts with an asterisk (*) and ends with a hash (#), it is called MMI code. We usually do it in order to check our phone data balance. And sometimes when we enter the code, we see a message like the code is Invalid. And that’s when we call it an invalid MMI Code.

These MMI codes are relegated to different orders from energizing your telephone parity to checking your IMEI number. Albeit all these MMI codes appear to be comparative, they are basically of many types like Supplementary Service (SS) Code, USSD (Unstructured Supplementary Service Data) Codes, Manufacturer-defined MMI Codes, etc.

How to Fix When You See An Invalid MMI Code?

Here are a few methods that will help you resolve the invalid MMI Code error. Have a look at them.

Disabling the App

It can be considered one of the easy methods to solve the invalid MMI Code error. Sometimes there is some app that is creating error. All you can do it if you have recently downloaded an app, just delete it and if the MMI code is working. But if you don’t know which app is creating a problem, you can just enter into safe mode. To be in the safe mode you have to switch off your phone. Then hold the power button continuously and tap constantly on the menu button. This way you will enter into the safe mode. And as you are in safe mode, try dialing the MMI Code and if it’s running in the safe mode, the problem is with the app. Then after that just reboot your phone and delete the app.

Reboot in the Safe Mode

Rebooting the phone will help you remove all the third-party apps or other external software that are running in the background. With this your all the problems will be resolved that are running in the background. Rebooting your phone is very easy.

  • Just press and hold the power button of your phone.
  • You will see various options. You have to tap on the restart option.

  • You will a pop-up that will ask you if you want to reboot to the safe mode. You have to them tap on OK.
  • Then your phone will start booting in safe mode.
  • You will the safe mode is written at the bottom left corner of your screen.

Change the Prefix Code By adding Comma at the End

If you want to fix the connection problem, you can change the prefix code. You can add a comma at end of the prefix code. If you add a comma to the prefix code, it will force the operator to check the error and solve it as soon as possible.

Change the Prefix code by Adding Plus Sign in the Starting

Just like you made changes in the prefix code by adding a comma at the end of the prefix code, you can also solve the problem by adding a plus sign at the starting of the prefix code. It will also force the system to find the error and solve it.

Turning on SMS

In order to fix the invalid MMI code, you have to just enter into the device information mode and activate the radio to turn on SMS over IMS. To do is just type the code *#*#4636#*#* and go to your device’s information. Then you will need to click on the run ping test option and after that just tap on turn off the radio. Then finally tap on Turn on SMS over IMS.

Restarting Your Phone

Restarting your phone can work for fixing any kind of error. And here if you want to solve an invalid MMI code error, you can just use the trick. You have to restart your phone multiple times and check if it’s working or not.

Check the Network Settings

In case your signal is weak and not stable, you should check the network. To shift between networks like 3G, 4D, and edge, your phone search for a good signal. By changing a few settings, you can easily fix the issue you are facing.

  • Open your phone settings.
  • Now go to Network Connection and you have to tap on it.

  • Then, you should go to the Mobile network option and then see the network operators.

  • Now as you search the network operators, just tap on your Wireless provider.
  • You have to repeat the process 2-3 times.
  • Finally, you should reboot or restart your device and your device will start working properly.

Check the SIM Card

If none of the above-mentioned tricks worked, you should have a look at your SIM Card. There might bechance that your sim card is creating a problem. Maybe your SIM is damaged as you continue to pull out and reinsert it. Or there are chances that it might be cut. In such cases, you are suggested to change and get a new sim to deal with the problem.

These were some tips that will surely help you in finding the fixes for invalid MMI code errors.

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