Updated List of MMI Codes for All Android Models [2025]

Part 1. What is an MMI Code?

MMI code is a combination of numbers, asterisks, and hash symbols that you enter in your phone's dial pad to perform specific functions or access hidden features. This code is also known as the Man-Machine Interface code and is built into all phones. It helps users communicate directly with the device or mobile network.

Additionally, they work on most Android and Samsung devices and are often used for quick tasks. They act as powerful shortcuts and enable users to interact with their device or carrier services without needing extra apps or menus.

Difference Between MMI Codes, USSD Codes, & Secret Dialer Codes

Before you look for the secret mmi code list, it's important to know how it differs from USSD and secret dialer codes. For that, review the mentioned comparison table for better clarity:

Part 2. List of MMI Codes — Secret MMI Code List You Should Know

After having the detailed idea, this section offers you a list of mmi codes for Android that you need to know.

General Purpose MMI Codes (All Android Phones)

Device-Specific MMI Codes

1. Samsung

2. Huawei

3. Motorola

4. OPPO/Realme

5. Xiaomi

6. OnePlus

7. Nothing

Part 3. Where to Find More MMI Codes?

Now that you have a list of mmi codes for android, this section offers you simple and easier ways to trace these codes:

1. Manufacturer Websites

   Many phone brands like Samsung, Huawei, Xiaomi, Motorola, and OPPO share official MMI and secret dialer codes on their support pages. Hence, if you visit the manufacturer's official website or the FAQ section, you can find accurate and updated codes for your device.

2. Online Resources

   Trusted tech forums like XDA Developers, Stack Overflow, and Reddit often share verified lists of MMI and secret codes for different Android versions and brands. Reputable tech websites also provide updated guides and usage tips. Additionally, YouTube tech channels frequently demonstrate how these hidden codes work across various Android models and manufacturers.

Pro Tip. Use Dr.Fone Online Unlock to Check Your Android Phone's Authenticity

Now that you know what is a mmi code, if you want to check the authenticity of your smartphone when other IMEI checkers fail, use Dr.Fone Online Unlock for free. The tool enables access to over 20 types of device verification for iOS and Android devices. This includes Samsung KNOX Guard status, MDM lock, carrier lock, Xiaomi activation lock, warranty status across multiple brands, etc.

Additionally, when checking the device's warranty along with other details, it provides a detailed report that you can also save. Unlike other methods, using this tool is straightforward and simply requires you to enter your IMEI details. Hence, professionals and beginners can easily use it and access details in 2 simple steps.

Dr.Fone Online Unlock - IMEI Check

Check any device's IMEI for a free, in-depth 20+ point report—no ads, global support, and optimized for mobile.

• First free check with no login needed.
• Guaranteed ad-free experience.
• Comprehensive reports with 20+ different data points.
• Global coverage, supporting devices from all regions worldwide.
• Fully compatible and optimized for mobile devices.

Check IMEI Now for Free

Verify your device info safely in one click

3981454 people have downloaded it

Guide to Check Your Smartphone's Authenticity via Dr.Fone Online Unlock

While extracting the info for what are mmi codes, review the given guide and see how this tool is a safe option to check warranty status:

01of 02Access the Tool and Head to the IMEI Check Tab

Head to the "IMEI Check" tab to pick the "Samsung Warranty" option from the menu. After that, enter the IMEI number for the device you accessed using the IMEI code and click the "Check Now" button.

02of 02Check the Samsung Details and Save the Report

As you get the details, review Samsung's authenticity and pick the "Save Report" option to download it as a PDF document.

Verify your device info safely in one click

Part 4. How to Fix the Invalid MMI Code Android Problem

If you wonder how to fix invalid mmi code, here you'll get to know about the simple fixes with a detailed step-by-step guide:

Way 1. Change the Code

Try to change the code, as this issue often happens when the entered code is wrong or incompatible with the device or network. Small typos or format mismatches can cause the phone to reject the code. Therefore, if you adjust the sequence and add a comma, plus sign, or use a carrier-specific version, the device will recognize it properly. Besides, use the correct format since these codes vary by network, carrier, and region.

Way 2. Enable and Disable Airplane

Enable and disable the Airplane mode, since this will reset cellular links and clear temporary glitches or weak connections that might block MMI codes. This method cuts all wireless signals and then re-establishes them to give the device a clean start. Plus, it's quick, safe, doesn't affect any stored data or settings, and can be performed in a few simple taps listed below:

Instructions. Open the Quick Settings on the Android and turn on the "Airplane" mode. Wait for 10 to 30 seconds, turn it off, and retry your MMEI code to check if the issue is resolved.

Way 3. Restart Android Device

To resolve the invalid mmi code samsung issue, restart the device to clear temporary bugs and refresh network connections that may block code processing. It resets system and SIM processes, fixes minor software glitches affecting the dialer, and reconnects the device to carrier services for proper code execution. Plus, this quick method safely restores normal function without risking personal data or settings, as illustrated:

Instructions: Press and hold the "Power" and "Volume Up" buttons to choose the "Restart" option. When the screen goes black, wait for a few seconds and press the "Power" button to start the device again.

Way 4. Reset Network Settings

You can also try to reset the network settings, as this will remove corrupted or conflicting configurations that block communication with your carrier. It restores all network options like APN, SIM, and connection preferences to default and forces a fresh connection to the mobile network. Hence, this simple step provides a clean, stable setup for MMI code processing, and can be done in simple guided steps:

Step 1. Pick the "System" option from the settings and choose the "Reset Options" option to pick the "Reset Mobile Network Settings" option.

Step 2. On the new screen, decide whether to toggle the "Erase eSIMs" option, hit the "Reset Settings" option, and enter your device passcode.

Way 5. Restart the Device and Reinsert the SIM

If you still want to know how to fix invalid mmi code, restart the device by following the above instructions and reinsert the SIM. This process forces the device to re-authenticate with the carrier to fix the temporary glitches, signal drops, or SIM recognition issues. It also ensures the SIM is properly detected, resolves signal or hardware conflicts, and eliminates cached bugs that may interrupt communication between the phone and mobile network.

Part 5. Tricks and Tips for Using the List of MMI Codes on Android

Now that you have the secret mmi code list and an idea for resolving the code issue, follow the given tricks to use these codes effectively:

Conclusion

Summing up, for users who want to know about the list of mmi codes, this guide has offered you complete details. From answering what are mmi codes to resolving the code errors, we have covered everything in detail. So, as you receive the IMEI data using a valid code, use Dr.Fone Online Unlock to verify the authenticity of Android devices, such as Samsung.

Verify your device info safely in one click