Android is one of the most popular mobile operating system and majority of people use devices running Android OS. If you are using the smartphone and you have ever seen “connection problem or invalid MMI code” error show up and don’t know how to fix it, then this article will help you in getting rid of it.
When such an error is shown on your device, it means that you can’t make calls or send messages until the issues has been fixed. This can be quite irritating as you can’t contact anyone using your smartphone until you fix the connection problem or invalid MMI code error. This happens when there is some problem with the SIM authentication with your smartphone or there are issues with the carrier.
I have seen this type of error appearing on Samsung devices and other Android phones too and fixing it is quite easy. There are some simple ways using which you can get rid of the connection problems and invalid MMI code error message on your device.
Ways to Fix Connection Problem or Invalid MMI Code Error
1. Restart Your Device
When you are facing some issues with your smartphone, then the first thing you need to do is restart your device as this can solve most of the problems instantly. So, when you are facing connection problems on your device, restart it and see if the problem is solved or not.
The best way to solve the problem is to restart your phone multiple times. To do this, go to Network Settings in your device and then hold the Power button to turn it off and restart the device.
2. App Disabling
If you are getting the invalid MMI code error on your phone and you have recently installed some apps or games on your device, then try disabling those recently installed apps and see if it solves the problem. This is the most common case in most of the devices where a recently installed apps causes the connection problems.
If you don’t want to remove the apps from your smartphone, then you can reboot your smartphone in Safe Mode and see if the connection problems persist. If you are able to enter the MMI code in your dialer and it works, then you have an app on your phone that is causing the connection problems. You will need to remove the recently installed apps to fix the issue.
3. Modify the Prefix Code
When you enter a prefix code and it gives you an invalid code error, then you can solve the problem by simply modifying the code by adding a comma at the end of the code.
For example, if your prefix code is “*2907#“, then add a comma at the end of the code like “*2907*,”
By adding the comma at the end of the prefix code, the operation will be executed and any error appearing will be overlooked.
4. Activate Radio and Turn On IMS over SMS
This is an extremely simple way to fix connection problem or invalid MMI code on your device by entering in your device’s information mode and activating radio to turn on IMS over SMS.
Follow the below steps:
- Dial *#*#4636#*#* in your phone’s dialer.
- Select the Phone Information option.
- Click on Run Ping Test.
- After the Ping test is performed, click on Turn Off Radio.
- Finally, select Turn On SMS over IMS.
- Once this is all done, simply reboot your device.
5. Check Network Settings
If nothing works, then you need to check the network settings on your smartphone to try to fix the invalid MMI code error. Follow the below steps:
- Go to Settings > Network Connections.
- It depends on your phone where the network settings are present. Basically, it will be in the Wireless and Network tab in your Settings menu.
- Select Mobile Network and then select Network Operators.
- It will begin searching for all the available networks.
- Select your service provider.
- This is most likely solve the connection problems.
- If it is still not solved, then try to repeat the procedure multiple times until the problem is solved. Normally, it will take you 4-5 attempts to fix the issue.
These are some of the ways using which you can solve the connection problem or invalid MMI code on your smartphone. I hope that you were able to fix the issue using one of these methods. Please share the article with your friends facing the same issue and tell us which of these methods worked for you.