Mmi connection problems. Connection problem or invalid mmi code. Temporary problems with the mobile operator

Typical for smartphones that are trying to send a request to check an account, the amount of traffic, or similar actions. In general, MMI is translated as “Man-Machine Interface”. The interface is formed when sending USSD requests.

USSD requests are those for which, when sent to the operator, the robot generates data that is relevant only to you, for example, a balance. Thus, interactive interaction with the mobile operator occurs. USSD requests are typically preceded by an asterisk and a closing pound sign.

Incorrect connection or incorrect MMI code - reasons

The reason that problems occur, including an incorrect MMI code, may be the phone itself, which has incorrect settings, or a failure may occur due to incorrect operation of the SIM card. You should first try to fix the problem yourself, and if there is no positive result, contact the operator for help.

Usually the error appears at the stage of forming the request, that is, it has not even been sent to the operator’s robot yet. Accordingly, somewhere at the stage of creating the necessary request, a failure occurred or the network was unable to transmit it.

The appearance of the error is not affected by the type of operator or model of smartphone/phone; the problem is somewhat detached from these factors, however, an increased number of similar errors have been noticed on Android, and in particular Samsung smartphones. Most likely, this state of affairs is caused by the widespread use of brand gadgets.

Connection problems or incorrect MMI code due to smartphone settings

Now let's look at the incorrect MMI code and what to do. Initially, you should check, probably the reason is a simple settings failure. If the error appeared once, then you can try sending the message again after a short period of time. When there is still no positive result, you should make sure that you are entering the correct code. Information about verification codes is available on the operator’s website.

A small trick that often helps is changing the notification mode:

1. Expand the list of settings by swiping from top to bottom;
2. Activate airplane mode;

1. After a short time, about 30 seconds, turn off the mode and repeat the procedure of contacting the operator.

If this maneuver does not work, you should restart your smartphone. Hold the "Power" button for 10 seconds, then turn on the phone. In case of failures in the settings, the action should work.

Additionally, you can reset the settings to their original state, for this you use either the smartphone function of the same name or recovery mode. The first is a more gentle option, the action is performed like this:

1. Go to “Settings” and select “Backup and reset”;

1. Next, click on “Data reset”, and then “Device reset”.

Invalid MMI code on Android - manual network installation

Modern gadgets have long learned to work with 4G communications; it is very fast and advanced, but equipment modernization on the part of the operator slows down progress somewhat. Thus, an unstable connection may occur, then the smartphone will independently change the technology to another one that is currently available.

Such automatic transitions negatively affect the quality of communication and may be accompanied by interruptions. The problem is indicated by a changing inscription near the display of the number of antenna rods. You should independently set a more stable communication format, even if it is less progressive. To do this you need:

1. Go to "Settings";
2. Expand the full list using the “More” button;
3. Follow the link “Wireless Networks”;
4. Next, select “Mobile networks”;
5. Click on the “Network type” parameter;

1. It is recommended to make the 3G point active; if it does not meet the requirements due to the terrain in the region, then change it to 2G.

The coating should now be maintained at the same level and the cause of the error can be eliminated.

SIM card wear

Unfortunately, there are situations when, due to mechanical deformation or prolonged use, the SIM card is no longer able to perform its direct function - to maintain communication. In this case, you will have to contact the service center for a new card. In this case, contacts that were recorded only on the card memory will disappear.

If the error appears after the next SIM card change, don’t be upset, you probably just didn’t insert the card all the way. Try removing it and installing it again. Sometimes the contacts become somewhat deformed, so that a gap is created, generating an obstacle to communication. This may also cause the card or battery latches to break. You can check the functionality of the SIM card on another phone.

Replacing the card if you apply with identification documents is a quick procedure, and you will be able to keep your number.

Conflict over applications

Some programs are unable to function properly in general or in a specific environment. Such applications cause all sorts of problems, including with the network. To check if you really have this problem, you should run . This way, no secondary programs are launched. To initialize this mode, during the startup process, you should hold down the “Menu” button until the smartphone is completely loaded, and the action will be accompanied by a corresponding inscription.

If the error disappears, then the application is the culprit. Conflicts between the FX Camera program and the network have been observed, otherwise you will have to sequentially go through the extensions until the cause is determined.

In the end, if the problem still persists, then you can confidently point the finger at the network operator. Most likely he is carrying out work, modernization, etc. online. Then there is nothing left but to wait for a solution to the problem on his part.

If you still have questions on the topic “Wrong connection or incorrect MMI code - how to fix the error?”, you can ask them in the comments

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The Android operating system has enormous functionality, and with each major update, more and more features are added to users. At the same time, many errors may arise in the system that we, the users, will have to deal with. This article will focus on the "Invalid MMI Code" or "Invalid MMI Code" error. A similar message may appear when sending a USSD request, for example when checking your balance.

The easiest way to fix the error

The easiest way is to reconnect to the mobile network. You can simply restart your mobile device. If you do not want to turn off the device, then there is another way:

It is likely that such manipulations will correct the error with the MMI code.

Weak 3G or LTE signal

Another reason for the “Invalid MMI Code” or “Invalid MMI Code” errors may be a weak 3G or LTE signal. Due to poor network reception, a mobile device can constantly switch from one mode to another, thereby receiving various errors. However, the user can independently limit the speed by choosing the 3G operating mode or even 2G. This is done in the settings, section “Wireless networks” > “Mobile networks” > “Network type”.

Users of phones and smartphones often encounter an error. As a rule, this error appears when trying to make an outgoing call, send an SMS message or USSD code. Below we will look at some simple methods that will fix the problem.

A few words about the MMI code itself. The MMI code is used to generate a USSD request from a mobile device. Such a request always begins with an asterisk and ends with a hash, for example, *100#.

Mobile operators have long begun to use USSD requests with different codes to perform actions on the phone number from which the request is sent. For example, using a USSD request, we receive information about the current balance and tariffs, send free messages asking to call back, etc.

The error “Connection problem or invalid MMI code” can occur for several reasons:

1. Outdated USSD request. If you enter a USSD request, make sure on the operator’s website that the request you entered is not outdated and entered correctly.

2. . Quite often, users, having connected communication services from an operator many years ago, forget that the SIM card is also subject to physical wear and tear. If your SIM card is more than two years old, contact the nearest store of your operator to exchange the SIM card for a new one. As a rule, this service is completely free.

3. Insufficient 3G/4G coverage. Unfortunately, in our country there is a significant lag in the development of mobile Internet. While large Russian cities already have high-speed 4G Internet, in some regions mobile Internet may be completely absent.

If you notice that the 3G or 4G network is working intermittently, periodically connecting to GSM/WCDMA, then all this may lead to the “Connection problem or invalid MMI code” error.

To resolve the error in this case, you need to disable 3G and 4G Internet for a while. You can do this in approximately the following way (the steps may differ depending on the operating system, its version and the model of your device):

1. Open menu "Settings" ;

2. Go to item "Data transfer" ;

USSD requests greatly simplify interaction with a mobile operator. But sometimes glitches occur, leading to errors like “Invalid MMI code” on Android. What to do in such situations is described in this article.

Reasons for the error

A USSD request is a digital code sent to the operator’s servers, which returns the result in the form of a message with the requested information. These combinations are used to check your account balance, tariff plan, etc.

Factors influencing the occurrence of the error:

• Incorrect code;
• network problems;
• smartphone system failure.

Solution options

Before following the instructions, make sure you enter the correct code that is available to your operator.

Note! On some smartphones, the problem is solved by adding a symbol to the USSD code being dialed. For example, “*100#,”. To add a comma, press the “*” button, and to add a semicolon, press the “#” button.

Enabling Airplane Mode

The likely cause of the problem is a network problem. To reconnect to it, you need to turn airplane mode on and off.

Note! The instructions are applicable to Andoid 6.0 and MIUI 9 shell. In other versions of the software, the names of menu items or their location may differ.

Also, for quick access to the mode, hold down the power button until the shutdown menu appears → select “Flight”.

Rebooting the smartphone

If manipulating the airplane mode does not solve the issue, you should restart the device.

Wait for the phone to boot and check that the USSD request has been sent.

Changing the network type

Poor signal strength affects the appearance of the MMI error and depends on the default network type.

Replacing the SIM card

The SIM card needs to be replaced if it is outdated and does not meet the new standards. This is also necessary in case of physical damage (even minor). To do this, visit your operator's office with your passport and ask to replace it. This procedure is quick and free.

conclusions

The appearance of an error reporting an incorrect MMI code is due to several reasons. You should reconnect to the network using Airplane mode or reboot the device, change the network type, or add a character to the USSD code you send. As a last resort, you need to replace the SIM card.

Owners of mobile devices, taking into account the specifics of such technology, often send special USSD requests that allow them to obtain information about the status of their personal account, used or available tariffs, and so on. Sometimes this results in the operation being unable to complete, which is indicated by the phrase “connection problems or incorrect MMI code”. Or its equivalent. A similar problem occurs only on mobile phones running Android OS.

Of course, this is not the most important, but quite a necessary tool. Therefore, it is important to know what an incorrect MMI code means, as well as ways to find a solution to this problem.

Why does this happen:

• The mode involved has failed.
• Poor access to the operator's network.
• Damaged SIM card.

These are the main root causes. Based on them, an effective methodology is built.

Solving the problem

So, incorrect MMI code on Android - what to do? It is recommended to carry out the steps below, checking the result after each of them:

1. Open the settings menu of your phone or smartphone. Activate “Airplane Mode” in it. Wait five to ten seconds. Deactivate in the opposite direction. Analyze the effect.
2. Initiate a restart of the mobile device.
3. If you observe very poor signal quality, it is advisable to experiment with other available alternatives. Return to settings. Go to "More". Go to wireless, then mobile networks. Select an alternative connection method. For example, from LTE to 3G and so on.
4. Check the condition of the card you are using. Its work surface. You can temporarily install another one from the same operator. If it works perfectly, you will need to replace the old one.

As alternative methods you can try the following:

1. When entering an information request, add a comma after the hash.
2. In the equipment parameters, go to the “Calls” section. In it – in “Location”. Disable the default country code option.
3. Remove recently installed software from memory if an unpleasant situation begins to appear after such an installation.

By the way, it is important to note that when you are in roaming, some of the usual options for such USSD requests may simply not function. In this case, it is advisable to get advice from your operator or wait to return to the region where the mobile phone operates as usual.