5 Ways How To Fix Connection Problem or Invalid MMI Code

While here at Technobezz, we had covered a lot of Solutions for problems on almost all Mobile Phones. The Samsung galaxy variants being the very popular device, we have  wrote some of the simplest and helpful solutions for  issues facing on them. While there are a plenty  common errors on the Samsung galaxy.The Invalid MMI Code error is seen to be a prominent problem,most people cannot  make calls or send text messages . One of the problem that really caught our attention and which was found to be the most difficult of the many was Connection Problem or Invalid MMI Code .

A user complaint :

Hello i am having Connection problem or invalid MMI Code.”. I am unable to send or receive calls and text messages, and i cannot recharge airtime 

You normally see this error when you are about to check your account balance  , Topping up, Recharging or  performing any function designed by your sim service provider, like adding voucher to run a ussd code.

WHAT CAUSED CONNECTION PROBLEM OR INVALID MMI CODE

While different country  cell phone provider  varies, it still defined to be the same operation like 124#  , *1359# are operation functions use to execute a task.But if you are getting“Connection problem or invalid MMI code”  This error  normally occurs because of issues with service provider and sim card authentication.The Invalid MMI Code error is found on mostly dual sim smartphones, such as the Samsung galaxy S Duos.

HOW TO FIX  CONNECTION PROBLEM OR INVALID MMI CODE

How To Fix Connection Problem or Invalid MMI Code

Method 1

I am listing this solution first because users has less attention to this, yet it is the simplest and most effective one. App Disabling - there are a lot of user who have found deleting an app which may have being  causing the  MMI code error. However, this may not be the case for most people. To find out if there is any app that may have be causing you to get this error, you simple need to go into safe mode on your phone.In this guide we will be using Samsung Galaxy.

What is Safe Mode?

Safe mode is very similar to a computer’s safe mode. It do not load any Apps. Basically it  temporarily disabled all pre -installed applications and services that came with the phone and the one’s you have downloaded

How to Enter Safe Mode On Samsung Galaxy

To enter safe mode and to find out if there’s a culprit app that may be interfering with network operation of your phone, kindly follow the instruction below . Apps Like FX Camera is seen to be a treat in most cases.However, to enter safe mode:

>Turn OF your phone

>Hold the Power button

>While holding the power button keep tapping on the menu button, this is the button left of the home  key

You will be greeted with a safe mode logo at the bottom left of the screen.

Now it’s time to test .

>Enter the same Prefix code you were trying before within the dialer and see if it works eg “*135#

>If it works then there is an app is causing the Invalid MMI Code error on the android phone .

>Reboot your phone and remove any recently installed apps

Method 2

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.

For example

>If your Prefix code is *2904*7#

>Then adding the comma at the end would do just the trick

> *2904*7#,

OR

You can use the + symbol after * 

Like   *+2904*7#

By adding the comma it forces the operation to execute and overlook any error that’s in the way

Method 3

Please also read  :Secret Codes For All Samsung Galaxy Variants (S2/S3/S4/S5)

To Fix  Connection Problem or Invalid MMI Code on samsung galaxy , this method is simply entering into device information mode and activating  Radio and Turn on IMS over SMS

To Enter information mode :

>Dial *#*#4636#*#*  in the dialer

>Navigate to Device/Phone Information

>Click on “Run Ping Test ”

After the Ping test is performed

>Click on “Turn Off Radio”

then

“Click on “Turn on SMS over IMS”

IMS :IP Multimedia Subsystem
IP :Internet Protocol
SIP:Session Initiation Protocol

While this setting is off SMS is sent or received over a period of 1x(times) the circuit switched connection

Finally reboot .

Method 4

Restarting your phone several times can do the trick. Basically, turn your phone on , navigate to network settings. Then hold the power and the home button together until your phone turns off. then Turn it  back on.

Method 5

On Technobezz there are always more than one ways to solve a problem and here we have a collection of solutions, These links below are articles for different problems. But, most of my users has found a solution by applying the same principle.