In this Article I am going to tell you about all the possible methods to solve Invalid MMI Code Problem
Some Methods Are As Under
Method Number 1---------
Using Safe Mode........
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 into the Safe Mode?
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.
-------Test It Now--------
>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 I nvalid MMI Code error on the android phone .
>Reboot your phone and remove any recently
installed apps
Methods Number 2.....
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 Number 3.........
Adding Comma...
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 *1234*5#
>Then adding the comma at the end would do just
the trick
> *1234*5#,
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