If you are an Android user, chances are you have encountered the dreaded “Connection problem” or “Invalid MMI code” error at some point. This error can be extremely frustrating as it prevents you from making phone calls, sending texts, and accessing the internet.
But what exactly is the cause of this error? And more importantly, how can you fix it? In this article, we will discuss 8 ways to resolve connection problems or invalid MMI code errors on your Android device. So sit back, relax, and let’s get started!
1. Restart Your Device
The first and simplest solution to try is restarting your device. This may seem like a no-brainer, but you would be surprised at how many problems can be solved by simply rebooting your phone.
To restart your device, press and hold the power button until the “Power off” option appears. Tap on it and wait for your phone to completely shut down. Once it turns off, press and hold the power button again until your device powers back on.
If the “Connection problem” or “Invalid MMI code” error persists after restarting your device, move on to the next solution.
Clear the Cache and Data of Phone App
Sometimes, the issue can be caused by corrupted data or cache in the Phone app. Clearing this data can potentially fix the problem.
To do this, go to Settings > Apps & notifications > See all apps > Phone. Then, tap on “Storage” and click on “Clear cache.” If the error still occurs, try tapping on “Clear data” as well.
Check Your Network Provider’s Coverage
Another possible reason for the “Connection problem” or “Invalid MMI code” error is due to poor network coverage. Make sure that your phone is not in an area with weak signal strength or limited coverage.
You can also check your network provider’s website or call their customer service to see if there are any known outages or issues in your area. If there are, the best solution is to wait for the problem to be resolved.
Check for SIM Card Issues
If you have recently switched to a new SIM card or inserted a new one, it’s possible that the connection error is caused by a faulty or incompatible SIM card.
Try removing the SIM card and cleaning it with a soft cloth before reinserting it back into your phone. If this doesn’t work, try using a different SIM card to see if the error persists. If it does, then the problem lies elsewhere.
2. Update Your Device’s Software
Software updates not only bring new features but also fix bugs and glitches. So if you haven’t updated your device’s software in a while, it’s time to do so.
To check for updates, go to Settings > System > Advanced > System update. If an update is available, download and install it. After the update is complete, restart your device and see if the “Connection problem” or “Invalid MMI code” error has been resolved.
Check for App Updates
In addition to updating your device’s software, make sure that all of your apps are up to date as well. Outdated apps can cause compatibility issues and lead to various errors.
To check for app updates, go to the Google Play Store, tap on the three horizontal lines in the top left corner, and select “My apps & games.” If there are any pending updates, tap on “Update all” to get the latest versions.
Factory Reset Your Device
If none of the above solutions have worked for you, it may be time to consider factory resetting your device. This will erase all data on your phone, so make sure to backup any important files beforehand.
To perform a factory reset, go to Settings > System > Advanced > Reset options > Erase all data (factory reset). Follow the prompts to complete the process. Once your phone has been reset, set it up as a new device and see if the “Connection problem” or “Invalid MMI code” error still occurs.
3. Check Your Network Settings
Incorrect network settings can also cause the “Connection problem” or “Invalid MMI code” error on your Android device. To ensure that your network settings are correct, follow these steps:
Check for Airplane Mode
Make sure that Airplane Mode is turned off on your device. If it’s on, it will prevent your phone from accessing your network provider’s signal.
To check this, go to Settings > Network & internet > Airplane mode. If it’s turned on, toggle it off and see if the error disappears.
Turn Off Roaming
If you are trying to make calls or texts while outside of your network provider’s coverage area, make sure that Roaming is turned off. Otherwise, you may incur extra charges.
To turn off roaming, go to Settings > Wireless & networks > Mobile network > Data roaming. Toggle off “Data roaming” and see if the error persists.
Check for APN Settings
Access Point Name (APN) settings dictate how your device connects to your network provider’s network. If these settings are incorrect or outdated, it can cause connection problems and errors.
To check your APN settings, go to Settings > Network & internet > Mobile network > Advanced > Access Point Names. Make sure that the APN listed matches the one provided by your network provider. If it doesn’t, contact your provider for the correct APN settings.
4. Try Dialing the Code Manually
In some cases, the “Invalid MMI code” error may occur when trying to access certain features or services using codes such as *
06# for IMEI or ##4636## for device information.
If you get this error when using these codes, try dialing them manually instead of copying and pasting. Simply open the phone app and type in the code manually to see if it works.
5. Disable Call Forwarding
Call forwarding is a feature that allows you to forward incoming calls to another number. If this feature is enabled, it can cause connection problems and errors on your device.
To disable call forwarding, go to Settings > System > Call forwarding > Voice call. Toggle off “Forward when unreachable,” “Forward when busy,” and “Forward when unanswered.”
6. Contact Your Network Provider
If none of the solutions above have worked for you, it’s time to reach out to your network provider for assistance. They may be able to troubleshoot the issue on their end or provide you with further instructions.
It’s also important to note that the “Connection problem” or “Invalid MMI code” error may be caused by an issue with your network provider’s system. In this case, you will just have to wait for them to resolve the issue.
Conclusion
In conclusion, the “Connection problem” or “Invalid MMI code” error on Android devices can be caused by various factors such as software issues, network settings, faulty SIM cards, and more. By following the 8 solutions listed in this article, you should be able to fix the error and get your device back up and running.
Remember, if all else fails, don’t hesitate to contact your network provider for assistance. They are in the best position to help you resolve any network-related issues. Hopefully, this article has been helpful in resolving your connection problems and eliminating the frustrating “Invalid MMI code” error.
