Solution to: ‘Invalid MMI Code Error or Connection Problem’

solución error código no valido

Solution to: ‘Invalid MMI Code Error or Connection Problem’

When entering USSD codes it is possible that the named ‘Invalid MMI or connection problem’ error. It can be a frustrating mistake if you want to know your balance or information related to your phone line. In any case, the error is usually solvable most of the time, as we will show you below.

What are MMI (USSD) codes

Also known as USSD, they are codes that allow you to view information related to your telephone provider. In the vast majority of cases these codes are used for the purpose of viewing the balance, mobile data and other information of value to the user of an operator.

This type of code is used through the ‘phone’ application, that is, the one we use to make phone calls. In most cases, MMI codes start with symbols such as the asterisk ‘*’ or the numeral ‘#’ and, as we indicated, they are employees to perform basic query operations related to our telephone number.

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How to fix the connection problem or invalid MMI

Fortunately, the connection problem or invalid MMI is usually very easy to solve. In most cases it refers to typing errors, network connection failures or service down. Let’s thoroughly analyze the reasons for the problem and how to fix it.

Modify the prefix code

There is a possibility that you have simply written the MMI code in the wrong way. Therefore, the first thing is to check that you are writing the code correctly, as indicated by the operator. It is important that you do not interchange the symbols or the numbers.

In fact, miswriting the code is one of the main causes for the ‘Invalid MMI Code’ error to come up. In any case, if the above does not work, there are a few more things you can try, but we insist, check that you have written the code correctly.

Try restarting the device

Restarting the device may work when the connection or MMI problem arises. Turn off and turn on the mobile will make all essential apps reload. Your sim card may not have been detected correctly, which could cause the MMI error. In the same way, try to insert the SIM card of your mobile again, it may be that you have done it wrong.

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Check that you have a signal

MMI codes require that your phone be connected to your operator’s mobile network. If you notice that the cell phone signal is very low or non-existent, this could be the reason for Invalid MMI or connection error appears.

In other words, verify that the mobile signal is adequate Before entering any MMI code, if you don’t have a connection, errors will appear. Therefore, if you live in an area with little coverage, you will have to solve mobile signal problems or move to a place where the signal is good to make your query.

Line not active

Another reason that can cause connection errors or invalid MMI code is that you are no longer a user of the mobile operator. Therefore, if you haven’t used your cell phone for a long time, there’s a chance they cut your line. If so, you will have to contact the operator directly.

SIM

Operator failure or maintenance

Modifications or maintenance in the operator could be the reason for errors with the MMI code. In most cases, the operators notify when maintenance is performed. In any case, if it is a general failure, you just have to wait. In most cases you can identify maintenance or signal problems when the 3G or 4G mobile data icons do not appear or when the signal bar is very low.

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Start the device in safe mode

In devices with versions higher than Android 9 there is the so-called failsafe mode, very similar to the safe mode present in Windows. With this mode the cell phone will start with the basic functions, something that can help if you cannot access the functions of an MMI code.


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