Correct incorrect MMI code if there are connection problems. Invalid MMI code - what is this error and how to fix it What does an invalid MMI code mean Samsung galaxy

Everyone who has mobile phone android, encountered a pop-up window when typing USSD command: "invalid MMI code." There are different interpretations of the message, but they have one thing in common - the MMI code. What does the mysterious message mean: connection problems or incorrect Tele2 MMI code?

MMI is a connecting code between the subscriber’s USSD request and the operator’s service application. It is sometimes formed incorrectly and an error appears, which is visible on the screen in the form of a corresponding message.

Causes

A problem in generating a code occurs for various reasons: a breakdown of the gadget, user inattention when entering the USSD number, a breakdown on the server of the service company. The first two points can be corrected by the user himself; we will analyze them further.

What to do, connection problems or incorrect mmi code Tele2 on Android

There are a lot of ways to overcome problems, at least one will work. Most often, a connection problem occurs due to the subscriber’s own carelessness and entering unnecessary invalid characters in the request or invalid commands.

Send the USSD command again

The most common command among users is checking the balance using *100#. Did the phrase “faulty MMI Tele2 code” appear as a result of checking your account? You need to check the connection, if everything is fine with it, then send the request of interest several times with an interval of 5 minutes. If this does not help, you should contact your operator to rule out the possibility of problems with the service company.

Turn airplane mode on and off

A useful key in every Android is airplane mode. When enabled, all communication capabilities on the device are disabled. After disabling the mode, you need to enter the desired USSD request again.

If the operation of the gadget is prevented by a failure in its system, then you need to reboot or turn it off and on, then check for an error.

Network type changes

Today there are network types: 4G, 3G, 2G. You need to try switching to another type in order to eliminate the error. In the settings you need to find the section “ Mobile networks" and in "Network mode" select a different type than the current one. Next, dial USSD; if there is no error, you can return to the previous network type.

Operator network check

It happens that the device is configured by an unnecessary operator. To check the settings, you need to go to “Mobile networks”, to the “Network Operators” section and select the desired telephone company. Manipulation will help, especially if there is roaming.

Often normal operation The phone is hampered by additional downloaded applications. To disable all applications and leave them running only system settings you need to set "Safe Mode". It will allow you to find out whether they are interfering third party programs functioning of the smartphone.

To turn on the mode in most phones, you need to hold your finger on the “Power” button for several seconds. Next, a sign will appear showing the transition to safe mode or the smartphone will turn off immediately. When turned on, there will be a “Safe Mode” mark at the bottom of the screen. In the mode, you need to type the command of interest and see if the smartphone begins to work better.

To reset the mode, the phone must be rebooted.

Problems with SIM

A faulty SIM card can cause an MMI code error to appear. The card may be old, worn, or improperly cut. Only replacing it with a new one will help. The service is provided free of charge in any service center operator.

If the above methods do not help resolve the problem, all you can do is contact your telecom operator for help; perhaps the problem is not yours, but the service organization’s.

Sometimes, when using a smartphone or tablet running Android OS, an error appears: “Connection problems or incorrect MMI code.” On English language this error looks like this: “Connection problem or invalid MMI code”.

Usually, this error occurs when you try to send a request to a telecom operator, for example, when trying to find out the amount of funds in your account.

The MMI code allows the telecom operator to identify the user when performing various services. Moreover, an error associated with the MMI code occurs on devices regardless of the brand and telecom operator. The reasons for the error may be different; it could be a malfunction of the telecom operator, incorrect device settings, or even recent operation. installed applications.

How to get rid of the error “Connection problems or incorrect MMI code”

Depending on the cause, there are several ways to resolve the error. It is best to start solving an error with the simplest methods.

Despite its simplicity, you should not ignore this method, because rebooting the device can really help solve various errors, including the “Connection problems or incorrect MMI code” error.

2) Changing the request code.

Another simple way to get rid of the error adding a comma to the query. For example, in order to find out the amount of funds in the account, you just need to add a comma to the usual request.

This is the method that helps most users get rid of this error. To add a comma, you need to hold down ∗ .

3) Remove recently installed applications.

If previous methods didn't help you, perhaps deleting recently installed applications will help you. To check whether any application is causing the error, boot your device in safe mode. To enter safe mode, you need to turn off the device and simultaneously press the power button and the “Volume -” button (depending on the brand of the device, the method of entering safe mode may differ). If you successfully enter safe mode, the system will notify you about this. Check if the error appears when the device is in safe mode. If the error disappears, then the problem is in one of the recently installed applications and it needs to be removed.

Quite often, smartphone users Android based encounter a connection problem or an invalid MMI code. In most cases, owners of Samsung devices encounter this error. This error occurs when performing certain operations such as checking an account, operator tariff or traffic. In other words, when forwarding a USSD request.

Below are recommendations for resolving the error: incorrect MMI code. One of them can eliminate the error in a specific case. This error has nothing to do with smartphone models or operators; it can appear at any time.

It is worth noting that all the methods described below may not be useful if some characters were simply accidentally typed on the keyboard, after which this error occurred. This happens sometimes. In addition, it is possible that the entered USSD request not supported by the operator. This can be checked on the company website mobile communications, if there are doubts about the correctness of the request.

The easiest method to fix the “Invalid MMI code” error

If the problem arose for the first time, and before that on this smartphone nothing like this happened, then there is a possibility that the problem is in the connection. To check this, you need to perform several sequential manipulations.

Initially, you need to go to settings. After this, you need to activate flight mode and wait five seconds. Then you need to deactivate airplane mode. Next, you should try to perform the same manipulations after which this error occurred.

If, after completing all these manipulations, the error does not disappear, then you need to completely turn off the phone, and then turn it on again. To do this, you need to hold down the power key and confirm the shutdown. After this, you can check for an error.

Installation in case of incorrectly functioning 3G or LTE (4G) network

Sometimes this problem may arise due to bad signal. A sign of this is the constant change of network by smartphone. At the same time, the signal level icon in the notification area constantly changes.

IN in this case you need to go to the communication settings and try to establish a specific type of connection. To find this you need to go to Settings and then select Secure Networks", where you need to click "More". Then you need to go to “Mobile networks”, where you need to select “Network type”. If used LTE phone, but there is no 4G coverage, then you should use 3G. If there are problems with it, then you should switch to 2G.

Problems with the SIM card

In addition, there is another option, which is quite common and requires quite a lot of time to eliminate. The “invalid MMI code” error may be caused by a problem with the SIM card. If the SIM card is quite old, or has been removed from the smartphone very often, then the manipulations described below may be suitable.

In this case, you need to take your passport and go to the nearest mobile operator office, where they can change your SIM card completely free of charge.

In addition, in this case, problems may arise with the contacts on the SIM card or the device itself, which does not always happen. Here you can simply try to pull out the card, wipe it and insert it back. This may help, especially since it will most likely have to be replaced with a new SIM card.

Additional options

All of the following were quite common among users and were discussed on the forums for troubleshooting the incorrect MMI code error. These recommendations may only apply to Samsung smartphones. Perhaps they may not help, however, it is still necessary to know them.

You can try to run a query that requires a comma at the end. You can insert a comma by holding down the “*” key. In addition, applications that were recently installed may cause the error. It's worth trying to remove them. You can check the programs in safe mode that you need to switch your smartphone to. If in this case everything works as it should, then the reason is in the programs. You can watch on YouTube how to get into safe mode on Samsung.

Here, in principle, are all existing cases of an incorrect MMI error. It is also worth noting that if this problem occurs while roaming and not on its own network, then the problem may be that the smartphone is in automatic mode connects to the wrong network. Besides, in this place Some queries may not be supported.

In this case, if possible, then you can contact your mobile operator. By the way, this can be done online. You need to ask him for instructions on how to fix the problem. Perhaps the operator will tell you which network to use.

In general, the problem can be solved quite simply. Any of the above should definitely help get rid of the error.

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 the account balance, tariff plan and so on.

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 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 level affects the appearance MMI errors 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 when physical damage(even minor ones). 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 your device, change the network type, or add a symbol to the message you are sending. USSD code. As a last resort, you need to replace the SIM card.

When performing USSD requests, various types of errors may occur. A very common situation occurs when, after sending a request, a notification “Connection problems or incorrect MMI code” appears on the screen. MMI is a query generation code used to connect the user and operator. Sometimes this process fails and an error appears in front of you. We will talk in detail about how to fix it in our article.

Method for correcting the error “Connection problems or incorrect MMI code.”

Reasons for the error

This phenomenon may occur in your phone due to incorrect settings or due to a malfunction of the SIM card. To begin with, you should try to fix the problem yourself, but if this fails, then it’s time to seek help from mobile operator. An incorrect MMI code may appear when using any operator: MTS, Beeline or Megafon. The brand of the device also does not affect this process, however, it has been noticed that on Android devices, in particular from Samsung, this problem occurs more often. However, most likely this is due to the fact that this brand of gadgets is in great demand.

Invalid MMI code: how to fix

Method 1: Retry the request. Sometimes you get an error when entering a request, but you do not experience any problems with communication. In this case, you should repeat the input after a while, since, most likely, your operator is to blame for the failure.

Method 2: Turn on airplane mode. Airplane mode can disable many functions. If you encounter connection errors on your Android, then open top panel and switch airplane mode to the active position for a few seconds, then turn it off. After this operation, everything should fall into place.

Method 3: Reboot your smartphone. If turning on airplane mode did not help you, then after rebooting the device there is a connection problem or invalid code MMI can be eliminated. Reboot or turn your gadget on and off, then check it for a malfunction.

Method 4: Change the network type. Modern devices can work with 4G communications. However, it does not always work stably on Android. This can be understood by the change in the inscription next to the communication stripes. The question arises - what to do? If you are faced with exactly this situation, then you need to change the network type:

open Settings.
go to " Wireless network» – “Mobile networks” – “Network type”.
select the 3G option, if it does not meet the requirements of your region, then select 2G, then everything can be returned to its place.

Check if your queries are working now.

Method 5: Change SIM card. Sometimes the SIM card gets damaged and loses its main function. In this case, you need to contact the cellular center for a new card. Contacts located on your old SIM card and those that were not saved to the phone memory will be deleted. If you purchased a new SIM card, but the error occurs again and again, check whether you have inserted it completely into the appropriate slot. You can also remove the card and put it back in place again. You can also check the quality of its work on another smartphone.

Method 6: Put your phone in safe mode. Sometimes third party applications may affect some processes in the device. To determine whether a “foreign” program is to blame or not, you need to go into safe mode. To begin, hold down the power button on your phone. Then, in the menu that opens, hold your finger on the “Shutdown” item. A dialog box will appear in front of you, informing you that you have entered safe mode. After clicking "OK" your phone will be launched. It will only contain system programs. Therefore, you will be able to determine whether a third party is at fault software or not.