Fix Connection Problem or Invalid MMI Code Error in Android | Samsung Devices – TechDisko

Fix connection problem or invalid MMI code error: No doubts smart phones have given us a complete entertainment package within a small gadget. But there is no use of a smartphone if you are unable to call or text. I have covered many errors in my previous posts about calling problems. In this post also I will tell you about one such error i.e. connection problem or invalid MMI number.

This error won’t allow you to call or text anyone. Sometimes you cannot even recharge your phone through airtime. Most common form is when you try to call someone an error flashed on your screen saying “connection problem or invalid MMI Code”. This error could be due to SIM authentication or issues with your carrier provider.

Also this error is most common in dual SIM devices and especially in Samsung smart phones like galaxy s duos, galaxy grand etc. When you use carrier provider’s activity like calling, texting, checking your phone’s balance, recharging through airtime etc. So just go through some of the possible solutions that can help you to resolve this connection problem or invalid MMI code error. You can try any of the methods most of them are effective.

Fix connection problem or invalid MMI code error in android smart phones and tablets:

Method 1 to fix invalid MMI code in android phones: It could be due to any recently installed app that which is causing this error in your smart phone. Jo advice you to uninstall any app installed recently. To check just turn safe mode on in your smart phone and try to call or type service providers any code.

Like *141#, *123# etc.

Safe mode will disable all your apps and you can use basic features like calling etc

Method 2 to fix invalid MMI code error in Samsung smart phones: 

As I have said earlier this error is most common in Samsung phones.  In this method you need to manually select your operator. For this

Go to settings >> connections >> more networks >> available networks. It will show all available networks for your device. Select the required one and reboot your phone.

Method 3 to fix connection problem or invalid MMI code error:

Another simple and effective way to fix Connection Problem or Invalid MMI Code on android phone is to add a comma at the end of the Prefix code.

Method 4 to resolve invalid MMI number problem: Well this is a simple method but very effective one. Add , at the end or + at starting of the code. This enables device to perform usual function neglecting any type of error.

Method 5 to fix connection problem or invalid MMI code error in android: Well the simplest method. Just restart your device. If error is gone then ok but if not then again restart. Repeating this procedure 3-4 times could fix error.

I hope these methods will help you to fix MMI code and connection problem. Still getting any problem then I advise you to take your phone to service center or data provider’s customer care.

For any queries I am always there to help you. Just ask in the comment box below.

Thank You.