How To Fix Connection Problem or Invalid MMI Code Overview
If you get an error "Connection Problem or Invalid MMI Code", in that location are several fixes that tin solve the problem.
How To Fix Connection Problem or Invalid MMI Code
The mistake tin happen on any smartphone, Android, or iOS.

While the location of settings and options change the problems and fixes beneath are the well-nigh mutual causes of the fault.

What is an MMI Code?

An MMI code is the characters such every bit Star (*) or Pound (#), which are used for special commands on a cell phone network.

MMI is short for Man-Machine-Interface and are available for a diverseness of functions and options.

What is a Connexion Problem or Invalid MMI Code?

An invalid MMI code is a mobile network error that has a range of problems, from connection problems to say-so issues.

It mainly is a problem with a Sim Bill of fare and is an error that happens commonly with Dual Sim Bill of fare smartphones.

There are several fixes that can solve the issue from manually switching the network such as 3G or 4G LTE to immigration onetime data.

The almost common problem with a MMI Code Mistake is the smartphone Sim Card having a trouble with dominance on the mobile network.

4 Fixes for Connection Problem or Invalid MMI Code?

  1. Restart the Smartphone

    2. If yous haven't already, restarting the smartphone can often go it working once more.

    The telephone may take an error which a restart volition often articulate.

  2. Clear Mobile Data and Enshroud


    3. The next choice is to articulate the mobile data and the enshroud. This data may accept bad information that is causing an error.

    Go to Settings–> Applications–> Contacts–> Mobile Information.
    Clear Mobile Data and Cache
    Choose the options to Articulate Information and Clear Cache.

    After clearing the data check to encounter if the phone works, if not attempt the adjacent method.

  3. Plough Off I Sim Menu

    4. If Available Look in Sim Card Manager
    If you have a Dual Sim menu smartphone turning off the unused Sim Carte tin can often solve the problem.

    If bachelor, look inside Sim Card Manager for the options.

    Plough off the unused Sim Carte du jour and test to see if the error clears.

    If you are unsure which Sim Card is unused only test each ane, on and off, to see if it works.

  4. Change the Mobile Network Band

    5. Changing the mobile network to another ring is a common fix.

    Which mobile network will piece of work, depends on the location and will vary.

    For example, 4G LTE will work in one location while the much older 2G will work in another.

    Below are the methods to change the mobile network on Samsung devices and Huawei smartphones.

    The location to change the network can vary from phone to phone.

    How To Modify the Mobile Network Ring Samsung Smartphone

    • Become to Settings
    • Click Connections
    • Click Mobile Networks
    • Change the Mobile Network to another Band. (Often each band is tested to see if the phone works.)

      • Change Mobile Network

    How To Change the Mobile Network Ring Huawei Smartphone

    1. Go To Settings

      2. How To Fix Connection Problem or Invalid MMI Code Step 1

    2. Select Wireless & Networks

    3. Select Mobile network

    4. Select Preferred Network Blazon

      5. How To Fix Connection Problem or Invalid MMI Code Step 4

    5. Chane the Network to GSM/WCDMA Auto

Summary
If you get the error "Connection Problem or Invalid MMI Lawmaking" on your smartphone it tin can no doubt be very annoying.

The first step is to restart the smartphone to see if the error clears.

Adjacent, endeavour to clear out one-time mobile data and the enshroud which sometimes fixes the trouble.

If yous are using a dual sim card smartphone disabling the ane non currently being used can besides become the phone working properly once again in some cases.

And lastly, changing the phone's network band can also be a solution.

Have y'all had a smartphone that gives a" Connection Problem or Invalid MMI Code" Error? Let us know your fix and thoughts below.