How To

I’m sure most Android users have at some point received a message saying “Connection problem or invalid MMI code”. This can sometimes be so frustrating and so painful to deal with. When the invalid MMI error code appears, it simply means that calls and text messages cannot be sent until that particular problem has been resolved.

There are several problems for which the error message “Connection problem” or “Invalid MMI code” appears. The main reason, however, is probably due to service provider issues or issues related to SIM card authentication on your smartphone.

Solution for Connection problem or invalid MMI code

Try to restart your Android device

The first method you could try and fix the invalid MMI code error message would be to restart your smartphone first. Open in Network Settings. Then simultaneously press and hold the power and start buttons until all the lights on the phone are OFF. The smartphone will vibrate and restart.

Try to modify the prefix code

The other way to fix your Android phone connection problems would be to add a comma to the end of the prefix code. When you modify a prefix code, you will force the operation to run while ignoring any errors. Here are 2 different ways this can be done.

If the prefix code is, for example (* 5424 * 7 #) , you can add a comma on the back to make it look like this ( * 5424 * 7 #) without the square brackets.

You can use the + sign after the * to make it look like this (* + 5424 * 7 #) without the square brackets

Try to activate radio and activate IMS over SMS

• Open in bookmark
• Type * # * ## 4636 # * # ** There is no need to press the submit button as the service automatically appears after you finish writing the code.
• Tap on the device info or just on the phone info
• Click on Run Ping Test
• Press the “Turn off radio” key and your Android will restart.
• Click on Restart

Try to check the network settings

• Open in Settings
• Click on Network Connections
• Hit on mobile networks
• Click on Network Operators and choose the wireless provider after the search
• Log in once again for another 3-4 tries before you can start working again

You can read the solution for “not registered on network” error or read “Unfortunately, the process com.android.phone has stopped” which is probably a solution to your problem.

Any questions you have regarding the error message “Connection problem or invalid MMI code” you can leave it in the comments.

If a message appears on your mobile that says “not registered on network”, it could be caused by a hardware or software problem.

However, in many cases, it is due to simple problems with quick solutions, which can make your mobile work again. It is a fairly common problem with Android devices across all brands and operators.

Most of the time, the user simply needs to restart the device or activate and deactivate airplane mode again, and this usually solves the problem of the unavailable mobile network.

However, sometimes it is necessary to re-register the phone and reconnect it with the operator.

These solutions for devices that appear as not registered on network, will serve you for both Android and iOS mobiles, and apply to all brands and models of mobiles, including, among others, Nokia, Samsung, iPhone, Motorola, Xiaomi phones, Sony, Blackberry, Apple, LG, Panasonic, Huawei and Sony Ericsson.

Without further ado, let’s discuss the possible causes and solutions for when your mobile appears as not registered on network.

How to fix a mobile that appears as not registered on network

Restart the device

Whenever a problem arises with an Android device, the simplest step is to restart your device.

To do this, you need to hold down the power button until a message appears to restart the phone, then select it and wait while the device turns on.

This will clean up the RAM on the device and allow the operating system to start from a new starting point. Most of the time, this will fix any problems you find on your device.

Activate and deactivate “airplane mode”

If restarting the device did not work, another common solution when your mobile is not registered on the network is to swipe down from the top of the device screen to open “notifications” and select “airplane mode” in the quick action bar in the top.

Once selected, there may be a message confirming the selection: press OK and wait a few seconds, then return to the action bar and deactivate “airplane mode“.

What this does is disconnect the mobile from any signal and then reconnect it. When this method fixes the problem, it is usually because the device was unable to successfully jump from one signal to another, leading to the device behaving as if it were turned off.

This problem often occurs when you drive through areas where there is no signal.

Manually select your network operator

Sometimes, the mobile must be manually directed to locate your network operator. This is very much like searching for a Wi-Fi connection and selecting it manually when the device has difficulty doing it automatically.

Try the following:

• Open configurations.
• Mobile networks option.
• Network operators and wait while scanning the area for mobile connections.
• Select your network operator from the list.
• Check if the problem was solved.

Check the SIM card

Regardless of the operator, mobiles use a SIM card, which you can access by opening the back cover of the device and locating what looks like a microSD card inserted in a slot near the battery.

Turn off your mobile and carefully remove the SIM card.

If your mobile does not recognize the SIM card, inspect for signs of damage. If everything looks good, be sure to re-insert it without forcing it into the slot.

Sometimes, the card can be displaced from your site , for example by the impact of a fall, causing the device to display the notification “not registered on network”.

Water damage

Mobiles, like any other electronic device, are very sensitive to contact with water.

If your mobile phone got wet, and although it seems that everything remains the same, the water could have damaged the components responsible for connecting to your provider.

Unfortunately, water damaged mobiles cannot be easily repaired and generally have to be replaced, or repaired by replacing the motherboard or other parts that may have been damaged or corroded due to excessive moisture.

In this article we give you some indications to fix a water-damaged phone, but if you do not succeed, you will have no choice but to take it to a trusted mobile repair center.

Something more about wireless networks

All mobile devices come with a wireless network connection that allows users to make calls to anyone outside of their network coverage.

And they work through different types of technologies. Different network service providers often do not use the same mobile network technology.

• GSM : Global Mobile Communications System. It is the most widely used mobile network worldwide. Some more technologies that are incorporated into the GSM standard include GPRS and EDGE. They provide faster data transfer in 2g GSM networks known as abbreviated high-speed downlink packet access as HSDPA.
• CDMA : Code Division Multiple Access. It is a newer mobile network technology that comes with increased data transmission capacity. For the 3g CDMA standard, the built-in technology is Evolution-Data Optimized or EV-DO.
• LTE : Long-term evolution. It is the generation of mobile technology called 4g.
• WiMAX : is another new entrant into the world of mobile technology. It is a close competitor to LTE and the first 4g network developed by Sprint. The HTC Evo was the first 4g phone they developed.

Conclusions

In some remote areas, there may be poor reception, and sometimes the signals do not reach the mobile, and this is simply because the signal is low or null in that area.

As soon as you are in an area where the signals are strong, the transmitter will be close and the strength of the signals will increase. If there is no coverage, the mobile network will not be available.

If your device appears as not registered on network, you will not be able to make or receive phone calls, send text messages or connect to the Internet unless you are using Wifi. On the other hand, if your mobile does not connect to Wi-Fi, it is probably a problem.

Many people factory reset their devices when they have the problem of “not registered on network”, without considering the consequences. And in most cases they forget to make a backup.

Always make sure to make a backup if you decide to restore your phone, because when you do, you will erase absolutely everything.

On the other hand, any damage to the software of a device can cause any type of problem, such as the mobile not charging well, until the mobile gets very hot.

For this reason, it will always be best to trust expert hands when faced with any inconvenience of our mobiles. Do-it-yourself often brings more problems than solutions.

Check Some Other Errors:

Mobile Network Not Available

Samsung keyboard keeps stopping

Any questions you have regarding the error message “not registered on network” you can leave it in the comments.

Although Huawei has reached the top of the market in recent months, for a long time Samsung was the leading manufacturer of Android mobile devices at sales level worldwide, which is why there are many people who have Korean smartphones, and that is why it is always convenient to know all the tutorials in this regard.

On this special occasion, then, we want to show you one of those that we consider the most important step-by-step regarding the specific keyboard of these devices, since we are going to teach you how to fix the error “Samsung keyboard keeps stopping”.

The first thing you have to know is that if your mobiles shows a message like “Unfortunately, Android keyboard has stopped“, you are not the only one that has happened to it, since a huge number of users unfortunately go through this problem.

Samsung Keyboard Error

If you want to try this method, simply go to “Settings” or “Configurations” and then to “Applications” press where it says “All“.

When you are here, simply click on the three dots above to bring up a menu. What you are going to do now is press where it says “Reset settings” ready.

In a few words and to summarize a little what we have just commented, it is that to solve the problems that the Samsung keyboard has, you have to reset the settings of the applications. It is the only way to solve this problem.

Does it occur in some models more than others?Actually, no, it is a mistake that can occur on all models of Samsung phones. It can even happen on other mobile devices. After all, the applications are not perfect and every now and then having one or another error is quite common, more on Android.

If you face error like Mobile Network not available we have given solution in our website.

So, regardless of the model or the range of your mobile, you can have problems with the Samsung keyboard. But as you will see solving it will not consume more than a few seconds and best of all, anyone can do this process that we leave you above.

No need to have great knowledge to find the solution, from now on the Samsung keyboard will no longer be a problem and you can use your device without having to worry about this.

Solution for Samsung keyboard keeps stopping

For the reasons we mentioned before, then, we want to show you what we consider to be the two main methods that exist when it comes to solving the error related to the Android keyboard application.

Solution I: step by step

Go to Settings, Applications, and then in this menu go to the tab where it says All

Once you are in the all tab, you have to click on the menu that is located in the upper right corner marked with the three dots

There you must give Reset Settings, and with that you will have finished

Solution II: step by step

Take your mobile and go to Settings, and then to Language and input

On that screen you have to click on Samsung keyboard, and then go to Reset settings and Reset keyboard

Once you have carried out the previous step, a new window will open, where you can find the Cancel and Reset options.

Of course, the one you have to select in this case is the Reset

The two methods that we have just taught you will allow you to position your keyboard in its factory state.

Mobile phones where you can fix the error Unfortunately, Android keyboard has stopped

With the tutorials that we have just taught you, we are absolutely sure that you will not have problems to solve the error in question in a good number of terminals, among which we can mention, for example, the following:  Samsung J1, J5, J7, Galaxy S3, Galaxy S3 Mini or Galaxy S4.

Even if you have signature devices such as LG, Huawei or ZTE, it is likely that the previous step-by-step are also useful.