Huawei Connection Problem or Invalid MMI Code - How To Fix

Most smartphone users are aware of the term "MMI code". However, some are not familiar with it. The MMI code is nothing but a unique identifier given to every smartphone so that the network and device can be identified.

If you have entered an incorrect MMI code on your Huawei phone, you may face issues like an invalid MMI code, no provisioning, or any other related error. In this article, we will help you troubleshoot and fix these issues on your phone. Read on to learn more about fixing invalid MCID or Invalid MMI code on your Huawei phone.

How To Fix Connection Problem or Invalid MMI Code on Huawei

Prefix code (MMI)

A simple and effective way to fix a connection problem or invalid MMI code on an Huawei phone is to add a comma at the end of the Prefix code.

For example:

If your Prefix code is *2904*7# then adding the comma at the end would do just the trick, which will look like *2904*7#,

OR

You can use the + symbol after * like *+2904*7#

The comma will force the operation to execute. This will overlook any error that's in the way.

Change the Network Operator

The next step to try would be to choose the network operator. Follow a few simple steps:

• Navigate to Settings
• Tap on Mobile Network
• Select Mobile Data
• Select Carrier
• Under Network Selection, toggle "Automic" Off
• Once off, tap "OK," and your phone will search for a Network

Information mode

This method requires you to enter device information mode, activate Radio to Turn on IMS over SMS, and fix the connection problem or invalid MMI code error.

Enter information mode :

• Dial *#*#4636#*#* in the dialer
• Navigate to Device/Phone Information
• Click on "Run Ping Test "
• Then, tap on "Turn Off Radio."
• Next, click on "Turn on SMS over IMS."

Reset Network Settings

Try resetting the network settings on your Huawei device. The process is simple. However, after performing it, you must adjust the options, add Wi-Fi passwords, pair the phone with Bluetooth devices, etc. To reset your network settings:

• Go to Settings
• Scroll down and tap System
• Tap Reset.
• Choose Network settings reset
• Finally, tap Network Settings Reset.

Reset All Settings

Try resetting the network settings on your Huawei device. The process is simple. However, after performing this, you will have to adjust the options, add Wi-Fi passwords, pair the phone with Bluetooth devices, etc. To reset your network settings:

• Scroll down and tap System
• Tap Reset.
• Finally, tap Reset All Settings.

Third-Party App

The best option, to begin with, is disabling some third-party apps. Many users have found a solution by deleting an app that may have been causing the MMI code error.

How can I be sure whether a third-party app is responsible for the connection problem or invalid MMI code? It's pretty simple. All you have to do is boot your Android device into Safe mode.

What is Safe Mode?

The safe mode on a device is very similar to a computer's safe mode. In safe mode, the device will not load any third-party apps, only the pre-installed ones.

How to Enter Safe Mode

To enter safe mode and find out if there's a culprit app that may be interfering with the network operation of your phone, kindly follow the instruction below:

Press and hold the volume-up and power buttons when you power on your phone until the Safe mode is displayed. Then use the volume buttons to choose Safe mode and the power button to confirm

Now it's time to take the test.

• Enter the Prefix code within the dialer and see if it works, e.g., "*135#
• If it works, an app is causing the Invalid MMI Code error on your Huawei phone.
• Reboot your phone and remove any recently installed apps.

Set Network Mode to Auto

Follow these steps:

• Navigate to Settings
• Tap on Mobile Network
• Select Mobile Data
• Select Preferred Network Mode
• You will get a pop-up menu with the different options you can choose from. Ensure that you select the first option that says 4G/3G/2G (auto connect).

Perform a Software Update

Navigate to:

• Settings
• Scroll down to the extreme bottom
• Select System
• Tap Software Update

Update APN Settings

Consider updating your APN Settings.

• Navigate to Settings
• Tap on Mobile Network
• Select Mobile Data
• Tap APN
• Tap More (3 dots)
• Tap Reset to Default.
• Then enter the new APN Settings.

Read this guide: Updated APN Settings For AT&T, Verizon, T-Mobile, Sprint ( +4 More)

Call your carrier

Consider calling your wireless carrier. Ask them if there is an issue with the carrier network. Otherwise, ask them for a SIM card replacement.

1. Ensure you have an active mobile data plan with your wireless carrier.

Read More on this

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2. Android Not Receiving or Sending Texts?
3. Is the Mobile Network available?
4. Is your phone Registered on a Network?
5. Android phones can't make or receive calls?
6. APN settings for AT&T, Verizon, T-Mobile, Boost Mobile