Connection problems or invalid MMI codes
When you try to call the operator numberwith a smartphone and then a pop-up window appears that writes connection problem or invalid MMI code, of course it is quite confusing. Especially if at that moment you really need special information from your respective operators. All of course there may be an error in the code entered due to a special cause.
Of course, as a user, you really have to understandhowan MMI code can be considered inappropriate. So it can really be calmer and make no mistake because later this problem can be solved independently, then try to contact the operator according to their respective needs. Although really you have to pay attention to the first few steps.
The existence of certain steps cannot be applied at the same time when trying to reduce connection problems or invalid MMI codes. So it needs to wait a few seconds to see if then the operator can be contacted. There is no need to worry immediately that your smartphone is breaking as this is related to the operator’s network.
So when that happens, be clear and wait patiently. If it is not resolved when you try again, you can start trying to apply some steps that can actually be taken as a solution to the error in the MMI code . You do not need to go to the place of service, this situation can still be fixed on its own.
Understand your phone’s MMI error code
Man Machine Interface stands for MMI as code. This code is a special service created so that you can access various features on your phone. Special codes consist of several combinations of symbols and numbers. Of course, it was created to make it easier for you when you need to use special features for each operator.
The use of this special code is when you need to get information about quotas or internet credits, as well as IMEI and other needs. However, there are still many possibilities of connection problems or invalid MMI codes that are also quite annoying as it hinders the process when you need to check certain information on the network according to your personal needs.
Many different things will cause errors in this combination of symbols , for example because the network settings are incorrect and there may still be many unnecessary files stored in the phone’s memory. Code errors occur due to if a temporary error appears on the phone, as well as due to the lack of support for the operator’s signal is decreasing.
So really the connection problem or the invalid MMI code on the phone is not something serious that even requires special handling. Users can actually apply alternative steps based on these probable causes to fix the error more easily later.
Practical tips to minimize errors in special codes
Many of the original solutions are actually quite easy to use as solutions if there is a connection problem or an invalid MMI code. It is possible that the cause is an error in your signal network so the solution is to restart the phone, then wait a few seconds before trying to contact the operator. This step will later help fix if there is an error on the phone.
The next alternative may be easier for you to try to enable the package mode on your smartphone, after waiting for some time to restore the signal to normal. This is a very useful solution to get your signal corrected again and quickly properly recorded by the phone.
When you find connection problems or invalid MMI codes, it may be because less important deposits are actually stored in memory. The habit of still leaving less important documents on your memory will inevitably eventually hinder its performance. So, it is important that you try to get used to checking the file manager section and start diligently deleting unimportant documents in memory.
Clearing your phone’s cache and various unnecessary files will give you more storage for other purposes. In the settings section, of course, you can easily find the storage section that can actually becleaned. Doing it regularly is also helpful to keep smartphone performance and memory optimal.
Give specific signs for operator number combinations
If indeed the previous quick trick still cannot definitively change the connection problem or the MMI code is invalid and there is still a problem, then try applying other steps. Inserting a special sign into the operator code when you call the operator can be an alternative so that the error can be resolved.
You can insert a + sign at the beginning of the entered code. For example, the code you need is to call *123# then try writing * + 123 # . The + sign will indicate how to keep zero longer. This method can sometimes be successful in troubleshooting invalid code errors on your phone.
Another distinctive sign that can also be used is a comma. But unlike the previous character, you have to insert this comma character at the end of the code. For example, write *123,#. The way to get the comma on the dial is to hold the * button longer.
The insertion of this character is actually a step that is rarely known or performed. If you did everything else, but it did not work, of course, inserting characters will be very useful. But pay attention and double check if there are connection problems or invalid MMI codes , you use them properly.
The appearance of errors in reading the specific code of a given command can also be found. Therefore, important steps can be taken as a solution that can be applied by giving it a special character. Try applying it, for example, there are connection problems or invalid MMI codes that are still there.
Advanced solution on how to change the signal
Oneenis network in smartphones with high signal strength that is widely used today is 4G LTE. However, this signal service also often causes errors such as connection problems or invalid MMI codes. The problem exists because of the lack of support for this signal when the need for contact is also a regular short message. Of course, the priority of the network is because the main focus is on the internet.
So, to fix this problem, you can try temporarily changing the 3G signal from using 4G. Of course, only in meeting the needs of short messages over the phone so that the network is more optimal. This will minimize the appearance of problems or errors in special codes when contacting the operator.
To change it, you can go to the settings of your phone, and then make the mobile network option . In that option , the option to set the network to be used on your phone will appear. Still just to change it from 4G to 2G / 3G, then save the settings and try to make the call to the switchboard as original.
That way, your phone network will be stronger and there will be no problem rereading the MMI symbol number combination . Indeed, there are now many developments made for today’s smartphones . So in this obstacle more than in the old version of the smartphone so it needs to be adjusted first.
Such network problems can actually occur in many types of operators and mobile phones. For that, you are not immediately confused because everything can still be properly solved. There are still a lot of solutions that can be applied so that you do not have connection problems or invalid MMI codes, but really the latest smartphone output will have minimal errors.