Megafon connection problem or incorrect mmi code. What is an MMI code: removing the error on an Android device. Application problems
Sometimes users encounter various kinds of problems that arise when using smartphones based on operating system Android. Today we will look at the “Connection problems or incorrect MMI code” error. It can occur when trying to make a call, send an SMS message, or even when requesting a USSD command.
MMI or Man-Machine Interface is the code used when generating USSD requests, but occasionally a failure occurs, which leads to the error that we are discussing in this article.
The error itself looks something like this:
The error may also appear on English: Connection problem or invalid MMI. The essence of this, however, does not change.
Now let's talk about solutions that will hopefully help you deal with the problem.
Reboot your device
The very first and simplest thing to do in case of such problems is to restart your smartphone. For what? It happens that some kind of glitch occurs software, which causes an error to occur. And a reboot in many cases allows you to cope with this (and not only) problem.
Turn on airplane mode
An option that sometimes helps you avoid rebooting your smartphone is to turn on and then turn off airplane mode (sometimes called “Airplane mode”). As you know, in this mode, any data transmission is suspended, and after shutdown, it is turned on again. In this simple way you can try to get rid of the error.
Disable the "Add country code" feature
A solution that has helped a huge number of users: the country code is automatically added to the number, which in turn can lead to the described error. We will show an example of disabling functionality based on a Xiaomi smartphone.
Open “Settings”.
Tap on the section with system applications. Sometimes system applications can be found in the main “Applications” section, for which, as a rule, you need to click on the menu button somewhere at the top of the screen, and then select “Show system applications” in the menu that appears. In our example, this section is placed separately.
Find the “Phone” or “Calls” application and tap on it.
Click "Contact Locations".
Move the "Add Country Code" switch to the "Off" position by simply clicking on it.
After that, try making a call or sending a USSD request.
Change network type
Go to settings, select the “SIM cards and mobile networks” section.
Click Preferred Network Type.
Change the network type.
Usually this is 3G or 4G, but not lower, although you can try, for example, turning on 2G, and then 4G again.
Select operator network
Go back a step and select “ Mobile networks».
Make sure your current network is automatically selected, for example:
If not, then change it, fortunately this can be done through the settings.
Add a character to the number or USSD request
Users write that sometimes a non-standard option helps - adding a symbol to the phone number or USSD code. This could be, for example, a plus sign:
Remove and reinsert the SIM card tray
Another option that may help is to remove the SIM card tray: remove it and put it back in.
Make sure the SIM card is working
To do this, use another phone or smartphone. If an error occurs in this case, the problem is most likely with the SIM card; it needs to be replaced. If everything is fine, the problem may be with your phone. Alternatively, you can reset all data.
What to do to fix MMI code error on Android smartphone?
When we enter a USSD request on our phone to check our balance, connect to a new tariff, or view information about the current tariff plan, the error “Connection problems or incorrect MMI code” may appear. For this reason, the sent request is aborted.
MMI is special code generation of commands (USSD requests), which is used to connect the subscriber cellular communications and operator. There are several reasons for this problem: a failure or breakdown of the SIM card, incorrect settings of the gadget, or temporary problems with the network connection.
Enter your request again
If the error “Connection problems or incorrect MMI code” appears on your phone when entering a USSD request, enter the command again. This issue may be caused by a temporary network outage that prevents the mobile device from completing the request you entered. Between attempts to enter a USSD request, take a short break - 30-40 seconds - to allow the device to connect to the network. You can change the location - go to another room or walk several streets. After that, enter your request again.
Reboot your smartphone
The cause of the error may be a failure of the smartphone's operating system. To fix the problem, simply restart your smartphone. After this, try entering the USSD command again. If the error does not appear after a reboot, it means there has been a slight glitch in the phone’s settings.
Activate airplane mode
Now only system applications work on the smartphone. Try entering a USSD request. If the error no longer appears, it means that some program on the mobile device is blocking access to the network. To find this program, put your device into normal mode. Find all applications that connect to the network. Uninstall each utility in turn and try entering the command until the error about the incorrect MMI code is corrected.
Replace SIM card
A common problem that causes an error to appear when entering USSD requests is problems with the SIM card. First, try turning off the device and removing the SIM card. After 20-30 seconds, insert the SIM card back, turn on the phone and enter the command again. If the error does not disappear, then there is a high probability of a SIM card failure.
In this case, you need to replace it with a new one. Old number You can transfer it to a new SIM card - to do this, call your mobile operator or contact the nearest mobile phone store in your city: Beeline, MTS, Tele2, etc.
It happens that when you try to call, send an SMS or make a request to the operator, your phone displays a message "Connection problem or invalid codemmi» . This message may appear at the most inopportune moment and cause a lot of inconvenience, especially when your business is urgent. In this article I will tell you what this problem of incorrect mmi code is, and I will also share best methods How to troubleshoot connection problems or incorrect MMI code, making your Android phone work long and reliably.
Code MMI(Man-Machine Interface - “Man-Machine Interface”) is used to formulate USSD request ov, allowing to organize interactive interaction between network subscribers and service applications of the operator. The user uses MMI to find out the balance, top up the account, connect or disconnect any service, switch to another tariff plan and so on.
Typically, the MMI code begins with an asterisk and ends with a hash; for complex queries, an asterisk is also used as a separator.
Connection problem or invalid mmi code - causes and solutions
This error may occur with different mobile operators and with different mobile devices, manifesting itself in the form of the message “Connection problems or incorrect MMI code”, “ Invalid code MMI", "Connection problem or invalid MMI" and others.
Often, a problem with the mmi code appears suddenly, and just as suddenly it can disappear, leaving the user at a loss about the real sources of its occurrence. Below I will list a list of existing causes of the problem, and also talk about ways to troubleshoot the problem.
Unstable operation of the operator's 3G networks
The operation of today's 3G networks in Russia, Ukraine and other post-Soviet countries is still far from ideal. There are failures, signal loss, unreliable operation of equipment and other troubles that manifest themselves on your device in the form of the network icon switching from 3G to 2G and back.
To solve the problem of connection problems or incorrect MMI code, simply disable the 3G connection for a while, giving your operator time to fix the problem.
Physical wear of the SIM card causes connection problems or incorrect MMI code
One of the most common problems. If your SIM card has been in use for many years, or is often removed and inserted, then it may lose its functionality due to wear and tear. Try connecting it to another phone and checking its functionality. If another phone has a similar problem with an incorrect MMI code, then you can try wiping its contacts, and if the problem continues, contact your mobile operator’s office for a replacement (experts recommend changing the SIM card every 2 years).
Problems with device settings
Incorrect device settings or malfunctions may cause a problem - connection problems or incorrect MMI code.
- Try rebooting the device, and if the problem persists, try full reset data.
- Go to “Settings” - “Backup and reset” - “Data reset” - “Device reset” (otherwise “Settings” - “ Backup" - "Reset data").
Temporary problems with the mobile operator
In this case, all you have to do is wait. You can call the operator and find out how long the error with MMI will persist.
Some applications work
Some externally downloaded applications may cause connection problems or incorrect MMI code. To confirm or refute this suspicion, boot your device in safe mode and try to make a request to the operator. If it goes well, it means that some new application installed on the phone is to blame and will need to be removed.
Find out how on your device on the website of the manufacturer of your gadget. On mine, Samsung, it’s done like this.
- First you need to turn off the device, then press the power button, and after the device turns on, you need to hold down the “Volume Down” button for a few seconds (while the developer logos are being displayed).
- After these steps, your smartphone (tablet) will boot into safe mode (you will see a message about this at the bottom of the screen), and you will be able to test its operation.
Conclusion
As we can see, connection problems and incorrect MMI code are usually caused by instability of mobile operator networks, as well as physical wear and tear of the SIM card. The causes of the problem may include incorrect phone settings, as well as third party applications, which can cause malfunctions mobile device. If you see an error like this, first of all, try contacting your mobile operator- It is quite possible that the reason is not with you, but with him.
The error “Connection problems or invalid MMI code” (or its variation “Invalid MMI code”) can occur in completely different situations. But most often, it appears when sending a USSD request. For example, the reason may be an error in the request or a problem with the SIM card. In this article we will look at all the options for solving this problem.
Error in USSD request
This option needs to 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 use is active. For example, it could have been moved to the archived list or the combination simply changed.
Also, make sure that you yourself have not made a mistake in the set. If necessary, consult your operator's contact center.
This error often appears when sending a request from a place with poor 3G or 4G network coverage. In this case, you should try to force the phone to switch to 2G mode. This is usually done in the “Settings” -> “More” -> “Mobile networks” -> “Network type” menu:
Also, it would be a good idea to restart your phone. If after the steps described above the error does not disappear, you probably have a problem with the SIM card.
SIM card problem
Sometimes, especially with old SIM cards, there are problems. The only solution is to replace the SIM card. Fortunately, this can be done in 5 minutes in almost any office of your operator, completely free of charge.
If you have any questions, write in the comments or new questions, we are always happy to help you!
Everyone who has a mobile android phone, encountered a pop-up window while 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 – connecting code between the subscriber’s USSD request and service application operator. It is sometimes formed incorrectly and an error appears, which is visible on the screen in the form of a corresponding message.
Reasons
The code generation problem occurs when various reasons: breakdown of the gadget, user inattention when entering the USSD number, breakdowns 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 that there is a problem 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 “Mobile networks” section 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 additionally downloaded applications interfere with the normal operation of the phone. To disable all applications and leave them running only system settings need to install " 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 indicating the transition to safe mode or the smartphone will immediately turn off. 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 that remains is to contact your telecom operator for help; perhaps the problem is not with you, but with the service organization.
