USSD services are long received standards for communication subscribers. cellular networks with service servers. Sending USSD messages resembles communication with bots in Telegram and other services where they have become widespread. By sending the command, the user receives a response - it can be certain data or information about the execution of the requested service.
Many users of smartphones and phones do not even suggest what the USSD interaction service is, while using them regularly. Checking the balance, change of the tariff plan, connecting services - this can do everything from most operators mobile communications Through USSD commands, such as: * 100 #, * 135 #, * 105 * 5 # and thousands of others.
When accessing the USSD service, the user may encounter an error of the following content: "Connection problems or incorrect MMI code". In such a situation, you must try to send a request again, making sure it is correct. If you repeat the data or execution of the command, it is necessary to eliminate connection malfunctions.
You can see the error about the wrong MMI code on android, while there is no difference, what mobile operator Used: Beeline, MTS, Megaphone or any other. Get rid of the error should help one of the ways described below.
Invalid MMI code due to bug in Android
Google actively brings android to perfection, but it does not save from the emergence of various bugs, especially after the development of smartphones by smartphones of its own services, shells and installation by user third-party applications. As a result, MMI error may appear due to bugs in the system, in such a situation it is easy to fix it:
These actions allow you to "restart networks", because in "Flight mode" they are turned off. If the method did not give results, you can also try to restart the smartphone.
MMI connection malfunctions for cellular fault
Often the error "Connection problems or incorrect MMI code" occurs due to a problem with a sim card or cellular connection. Pull out the card from the smartphone and inspect it for damage, as well as for contamination of contacts, if necessary, wipe them. Also pay attention to the contact pad in the smartphone itself, and, if necessary, clean it. Next, install the SIM card in place and again try sending a USSD request.
If the SIM card contact cleansing does not help solve the problem, you can try to set a fixed network type. It is possible that the problem is observed due to bad connection and constant signal loss cellular communication. In this situation in the Android smartphone, you must go to:
"Settings" - "More" - " Wireless networks» - « Mobile networks"-" Type of network "
Select one of the available network types, instead of the default installed. For example, if the smartphone interacts with the operator via LTE, put 2G or 3G.
Important: Try contacting USSD service from all types of network.
As a last resort, you can try to solve the problem with the change of the SIM card, contacting the cellular salon.
Additional ways to eliminate MMI errors on android
If none of the above methods helped, you can try to return the smartphone to the state in which it was before the error occurs. For example, if in recent days there have been changes in the options on the device or installed applications, you should remove all new items, and settings are set to previous values.
Another way that often helps get rid of an error with the wrong MMI code is to send a potentially erroneous request. It is recommended to send instead of the request "* 100 #" command "* 100 #,", that is, with a comma at the end. To put the comma on the smartphone keyboard when the number is set, you must hold the "star".
If the error does not disappear after trying to fix it with all the ways described above, you can try to reset the phone to factory settings or reset it completely. Please note that in this case, some data may be irretrievably lost.
Error "Connection or Invalid MMI Code" (or its variation "Invalid MMI code") may occur in completely different situations. But most often, it appears when sending a USSD request. For example, the reason may be in an error in the query or problem with the SIM card. And this article will consider all the options for solving this problem.
Error in USSD request
This option must be checked first. Even if you have previously used this request code, go to the official website of your operator and make sure that the service you want to take advantage is active. For example, she could be moved to the archive list or simply changed the combination.
Also, make sure that you yourself are not mistaken in the set. If necessary, consult with the contact center of your operator.
This error often appears in the case of sending a request from a place with a bad coating 3G or 4G network. In this case, it is worth trying forcibly switching the phone in 2G mode. This is usually done in the "Settings" menu -\u003e "More" -\u003e "Mobile Networks" -\u003e "Network Type":
Also, it will not be superfluous to restart the phone. If after the actions described above, the error does not disappear, you probably have a problem with the SIM card.
Problem with SIM card
Sometimes, especially with old SIM cards, there are problems. The only way to solve is to replace the SIM card. Fortunately, this can be done in almost any office of your operator completely free.
If you have any questions - write in the comments or new questions, we are always glad to help you!
It happens that when trying to call, send SMS or make a request to the operator Your phone gives a message "Connection problem or invalid codemMI» . This message may appear at the most inopportune moment, and cause a bunch of inconvenience, especially when your case does not tolerate deposits. In this material, I will tell you what is the problem of the wrong MMI code, as well as share the best methods of how to fix the connection problems or the wrong MMI code, making your android phone to work for a long time and reliably.
The code MMI (Man-Machine Interface - "Machine Interface") is used to formulate USSD requests to organize interactive interaction between network subscribers and operator service applications. The user uses MMI to find out the balance, replenish the score, connect or disable any service, go to another tariff plan etc.
Usually, the MMI code begins with the stars and ends with a grid, with complex requests as a separator also uses the stars.
Connection problem or invalid MMI code - Causes and Solutions
This error can meet from different mobile operators and from different mobile devices, showing yourself as a message "Connection problems or incorrect MMI code", "Invalid MMI code", "Connection Problem or Invalid MMI" and others.
Often the problem with the MMI code occurs suddenly, and as suddenly maybe the abyss, leaving the user in bewilderment about the real sources of its appearance. Below I will list the list of existing causes of the problem, as well as will also talk about troubleshooting methods.
Unstable work of 3G networks operator
The work of today's 3G networks of Russia, Ukraine and other post-Soviet countries is still far from ideal. There are failures, loss of signal, unworthy operation of the equipment and other troubles that manifest themselves on your device in the form of switching the network icon from 3G to 2G and back.
To solve the problem of connection trouble or incorrect MMI code, it is enough to disable a 3G connection for a while, giving your operator to correct troubleshooting.
The physical wear of the SIM card causes a connection malfunction or the wrong MMI code
One of the most common problems. If the SIM card works for many years, or is often removed and inserted, then it can lose its performance due to wear. Try to connect it to another phone and check its performance. If there is a similar problem with the wrong MMI code on another phone, then you can try to wipe her contacts, and in case the problem continue, contact your office mobile operator For replacement (experts recommend changing Sims every 2 years).
Device settings
Invalid device settings, as well as malfunctions in its operation, can cause a problem - connection problems or incorrect MMI code.
- Try to restart the device, and if the problem remains - try to execute full reset data.
- Go to "Settings" - "Archiving and Reset" - "Data Reset" - "Reset Device" (otherwise "Settings" - " Backup"-" Data Reset ").
Mobile operator's time problems
In this case, it remains only to wait. You can call the operator and find out how long the error with MMI will be observed.
Work of some applications
Some of the applications downloaded from the outside may cause an error with problems of connecting or incorrect MMI code. To confirm or refute this suspicion, download your device in safe mode And try to realize the operator. If it goes well - it means some fresh application from installed on the phone, which will need to be deleted.
How to find your gadget on your device on your device. On my, Samsung is done like this.
- First, you need to turn off the device, then press the switching button, and after the device turns on, you must start the "Volume down" button for a few seconds (while the developer logos are displayed).
- After such actions, your smartphone (tablet) will boot in safe mode (you will see the inscription about it at the bottom of the screen), and you can test it.
Conclusion
As we can see, the connection malfunctions and the wrong MMI code are usually due to the instability of the mobile operator networks, as well as the physical wear of the SIM card. The reasons for the problem can be incorrect phone settings, as well as third-party applications that can cause malfunctions mobile device. If there is a similar error, then, first of all, try to contact your mobile operator - it is quite possible that the reason is not with you, but he.
Sometimes the owners of smartphones face that a message in English "Connection Problem or Invalid MMI Code" appears on the mobile device screen or in Russian "Connection problems or an incorrect MMI code" on Xiaomi. Such a situation occurs if the user tries to send a short message, i.e. form a USSD request. So it becomes impossible to connect / disable the service, go to another tariff and use other services of a mobile operator.
The problem is solved in several ways that we will tell you about.
Changing the settings and reboot the phone
If an error occurs on the display it is recommended to restart the smartphone. In the event that after this action it is not possible to form a USSD request again, then you need to go to "Settings" and select the item "on the plane". You can also activate the mode, dropping the curtain on the main screen and choosing the desired option among the icons. After 10-15 seconds, you should deactivate the mode and check if the error remained.
Activation of secure mode
If some application has been installed, it could cause a malfunction in the work of the device. The optimal solution of the solution in this case is the inclusion of a secure mode. To do this, turn off the device, then hold the volume and inclusion button within a few seconds. An image of a corporate hare will appear on the screen and the inscription that the function you need is activated.
If the information about the wrong MMI code on Xiaomi does not appear, it is required to restart the phone and find the program that causes this error. Naturally, the utility found is to be removed.
Check signal level
With an unstable, weak or missing signal of a mobile operator, sending a request is not possible. The fact that the signal is too weak will indicate the change in the display of information about the connected network: then 3G, then EDGE, etc. In this case, you can try to go to "Settings" - "SIM cards and mobile networks".
In the window that appears, select the name of your mobile operator and specify the preferred type of network - 2G or 3G.
Roaming
It happens that the Xiaomi smartphone in another country is configured to cover the local operator, as a result of which sending requests to its network becomes impossible. You can use the above sequence of actions and select the "Mobile Networks" item. Instead of automatic network selection, you should choose your operator. If this did not help, it remains to contact the support service to clarify the issue.
Much less often is the situation when the message "Invalid MMI code" on Xiaomi becomes a consequence of the inoperability of the SIM card. Here only its replacement will help.
Sometimes, when using a smartphone or tablet on Android OS, an error occurs: "Connection problems or incorrect MMI code." In English, this error looks like this: "Connection Problem or Invalid MMI Code".
Usually, this error occurs when you try to send an inquiry to the communication operator, for example, when trying to find out the number of funds in the account.
The MMI code allows the communication operator to determine the user when performing various services. Moreover, the error associated with the MMI code occurs on devices regardless of the brand and telecom operator. The reasons for the appearance of an error can be different, it may be and malfunction of the communication operator, and incorrect device settings, and even work recently installed applications.
How to get rid of the error "Connection problems or incorrect MMI code"
Depending on the cause, there are several ways to solve the error. Start deciding the error is best with the easiest ways.
Despite its simplicity, it is not worthwhile to bypass this method, because the restart of the device can really help solve various errors, including the error "Connection or Invalid MMI Code".
2) Change query code.
Another simple way will get rid of the error Adding a comma to request. For example, in order to find out the amount of funds on the account you need to simply add a comma to the usual request.
It is this method that helps most users get rid of this error. To add a comma to keep ∗ .
3) Delete newly installed applications.
If the previous ways did not help you, you may be able to remove newly installed applications. In order to check whether any application is the reason for the appearance of an error, load the device in safe mode. To go to a 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 transition method to a safe mode may differ). With a successful transition to a safe mode, the system will notify you about it. Check if the error appears when the device is in secure mode. If the error disappeared means the problem in one of the newly installed applications and must be deleted.
