Why is the cell phone not picking up the network. What to do if the smartphone constantly loses the network

What to do if the phone does not catch or loses the network? If you watch this video, then again this is a problem. We will explain the reasons simply, this video is not about how cellular communications, satellites and fiber optic cables, etc. work. This is a video about how to find out what is the reason for the signal loss: in the device itself or in third-party circumstances?

Video channel Samsung Guide.

For any cellular operator, the network is built using base stations - towers. Each has its own coverage area. The quality of communication depends on how tightly the zone of each base station is adjacent to each other. When the phone moves from the area of ​​a certain tower, the system automatically determines the direction of movement and transmits a signal from it to another. The subscriber of transitions does not notice when the zones of several stations intersect. You can freely move, talk and use the Internet. But it happens that there are gaps between the zones. In this case, the subscriber has no connection until he moves.

There are several network modes: 2G - E - second generation. When the phone catches, the letter E appears at the top. In the settings it is designated as GSM 3G - H + - the third generation, the H or H + icon appears. In the settings it is designated as WCDMA. 4G is the fourth generation, it is displayed on the screen, it is designated as LTE in the settings.

The coverage area for different communication standards is different. For example, 2G is always slightly more than 3 or 4G. There are certain rules for switching between these modes. The device always tries to connect to the newer and faster mode. That is, if you are in the area of ​​​​a strong 2G signal and a weak 3G, the device ignores the high-quality 2G signal and catches a weak 3G. The result is a bad connection. For a while, change the network mode to a more stable 2G to eliminate the possibility of the phone being in an area with a low signal. Go to settings - Other networks - mobile - mode - GSM - this is 2G. If the device works normally with a 2G signal, it means that you are in an area of ​​poor 3 or 4G reception. It makes sense to contact your mobile operator for help. If the phone does not catch even 2G, we understand further.

Perhaps your SIM card is simply worn out or damaged. Replace it. The connection did not appear, then test the operation of the smartphone with a SIM card from another operator. This is necessary for the phone to register in a different network and at other base stations. If the smartphone catches normally, then the problem with the connection is on the operator's side.

If the phone also works poorly, it is necessary to exclude the possibility of software malfunctions. To do this, reset the settings, which serves to eliminate accumulated errors in operating system devices. How to do it right, see the video below. As a result of resetting the settings, all data will be erased, and errors will also go away with them. If the method did not help, we connect heavy artillery. The service center can do two things: update the software and replace faulty parts. The firmware is installed, excluding errors that may remain with self-updating. Well, we don’t recommend changing the details at all on your own.

If you came to this page, then most likely your phone has stopped seeing the Wi-Fi network, or networks. It can be a home network, somewhere away, a public wireless network, etc. The problem is that the network we need does not appear in the list of available ones on the phone. He simply does not find it, does not see it, and, accordingly, it is impossible to connect to such a network. There are often times when mobile device does not find any specific Wi-Fi network. Which, for example, a laptop sees and connects without problems. Or it may be that the phone does not find any network, but other devices see them and work fine with them.

In this article, I will try to collect all the most popular causes and solutions that can help you solve this problem. As usual, first it is desirable to find out what the problem is: in a mobile phone, or a Wi-Fi router. If the problem is with the Wi-Fi network at home, then we have a better chance of fixing everything, since we have access to the router itself. If this is someone else's network, then it is unlikely that something will be done.

In fact, it doesn't make much difference on which device you have a problem. It is clear that this is most likely an Android or iOS phone. Well, maybe Windows Mobile. Since this problem can hardly be solved in the settings of the mobile device itself, it doesn’t matter what device you have. It's the same with a router.

I already wrote individual articles for Android and iOS devices:

The phone does not see the Wi-Fi router: possible reasons

1 Disable / enable Wi-Fi, restart your phone and router. To get started, just go to your phone settings and turn off Wi-Fi. I think everyone knows how to do it.

Then turn it back on.

Reboot the phone:

• On Android, just press and hold the power button, then select Restart. Depending on the manufacturer and android versions, steps may vary slightly.
• On iPhone, press and hold the Home button and the Power button. The phone will reboot.

We reboot the router. If you have access to it. It is enough to turn off the power for a minute and turn on the router again. You can perform multiple reboots in a row. More details can be read.

2 We determine what is the reason.

Check all three items:

• If your phone does not see any Wi-Fi networks, but they exist and other devices find them, then it is clear that the problem is specifically in your smartphone. All I can advise is to reboot it, and remove the cover from it. If he is. If this does not help, then you can try performing a hard reset. If this does not help, then you will have to carry the device in service center.
• When a device does not find one network, the first step is to check if other devices can see it. If they do not see, then most likely the problem is on the side of the router. Let's reboot it first. If this does not help, then see the article:.
• If other devices find a Wi-Fi network, but your phone does not, but it sees other networks, then the problem is most likely in the router settings. As a rule, changing the wireless network channel and region helps. Below I will talk about this in more detail.

3 Change the router settings.

You need to go to the settings of your router, go to the section with Wi-Fi settings, and try to set a static wireless network channel and another region. You can also set the channel width to 20 MHz. It's better to take turns.

On TP-Link routers, it looks like this:

More details in the article:. You can experiment with the channel and region. For example, put the region USA. If you have a static channel set in your settings, then set it to "Auto".

Other problems with discovering Wi-Fi networks

I also noticed that people often write that the phone does not see the Wi-Fi of the laptop. I understand that the problem occurs when distributing the Internet from a laptop or PC. In this case, I advise you to first make sure that the laptop distributes wireless network. For example, view from other devices. You may have started the hotspot incorrectly. This is where the article comes in handy. Bring your phone closer to your computer.

The next case when problems with Wi-Fi appear after phone repair. For example, after replacing the battery, screen, glass, housing, etc. In such cases, I advise you to immediately take the phone to the workshop where it was repaired. Since the master most likely did not connect the antenna, or the Wi-Fi module itself.

Well, you don't need to rule out a hardware failure. Everything breaks, and the module that is responsible for connecting to Wi-Fi is no exception.

As usual, you can leave your question in the comments, or share useful information on this topic. Always glad to answer your questions and grateful for the additions to the article.

An annoying problem that many users face is that the phone does not catch the network. Once in this situation, it is easy to feel cut off from the world.

To begin with, it is worth seeing if there is at least some level of signal reception on the display. If yes, it is quite possible that you have selected a network that is not supported by your operator. In this case, fixing the problem is not difficult. Just go to "settings" and select the network search function "automatically". In case of failure, specify the required network manually in the same menu.

• The phone does not detect and the network does not work on the phone for many reasons. We can carry out high-quality repairs in our service center. We have experienced professionals. Do not put off going to our workshop, because the sooner you ask for help, the easier and cheaper the repair will be.
• We have a huge database of original spare parts, which allows you to repair your mobile as quickly as possible. You can purchase any part and try to replace it yourself. But we do not recommend doing this, since such experiments most often end badly.

Phone repair in Kharkov

099 221 48 00 063 167 01 00

We will perform phone diagnostics for free, select an original part, agree on the cost and perform urgent phone repairs with high quality and provide a company guarantee!

Why is the phone not picking up the network?

There are several reasons why there is no network in the phone. Consider the possible options:

1. The network on the phone is gone - it means that the radio contact is out of order. It is impossible to eliminate such a breakdown on your own, since the radio contact is a complex mechanism consisting of many elements. Finding out which of them is out of order is possible only with the help of a complete diagnosis in a service center.
2. The phone stopped catching the network (does not search for a network). This indicates a breakdown of the transmitter power amplifier. The only way to fix the problem is to replace the part. At home, it is impossible to make such repairs. To solve the problem, you should contact the service center for the repair of mobile phones.
3. The phone does not catch the network well. In this case, the reason lies in a faulty antenna. Since the antenna is a rather fragile device, it often ceases to function due to hard hit or when the phone is dropped. Replacing the antenna will fix the problem.
4. The phone cannot find the network and writes that there is no signal. It says failure software. To resume normal operation, the phone needs a flashing. You can qualitatively reflash the phone only in the service center.
5. The phone loses the network. Most often this happens due to the fault of the user or due to flooding of the device. To find out the cause of the malfunction, you must return the phone to a service center for diagnostics. If the phone has been exposed to moisture, you need to contact the service center specialists as soon as possible, since the corrosion that has begun is killing the phone more and more every minute.

Common causes of malfunction

• You are in an area with low base station signal strength
  If you are far out of town, in a forest, in a basement, in the subway, in the depths of an old foundation building with meter-thick brick walls, and your device shows low level network or even lost it, then most likely your device is working. And the loss of the network is caused by a low signal strength of the base station in a particular location. Also, the loss of the network by the device can be caused by a temporary shutdown of the base station itself on the operator's side.
• Software failure
  If the problem with the network is caused by a software failure, perform the following operations in sequence: remove and insert the battery, if it doesn’t help, do a soft reset through the menu, if it doesn’t help, do a hard reset through the service menu. For android, this is a certain key combination: you need to turn off the device, hold down the volume button and at the same time the power button for 3-5 seconds until the service menu appears on the display. For different models, different key combinations are used (volume up, volume down, home button), but always with the simultaneous pressing of the power button. In the service menu, use the volume buttons to select the item wipe data or factory reset. A hard reset will completely delete all client data from the device’s memory (book, photo, installed programs, etc.), i.e. the device will return to the factory state in which the device was when the device was purchased. If a hard reset does not help, then your device needs a software update in our authorized service centers using official programs provided by phone manufacturers. By updating the software in our authorized service centers, you can be sure that you will install the latest latest version Software from the manufacturer.
• Defective antenna, antenna key, radio processor, power amplifier, displetor, etc.
  If your device stopped seeing the network in the zone of reliable reception, then most likely a component repair and electrical replacement of the radio unit chips are required. Self-repair by the user of such a defect is not possible. In our SC, they will diagnose the main board, determine the damaged microcircuit and replace it with the help of a soldering station, and in case of damage to the microcircuits of the radio unit under the compound (glue), they will replace the entire main board with a new one.

Problems with mobile signal reception are common. In this article, we will look at the main reasons why a phone can “lose” the network, causing inconvenience to its owner.

Since today MTS is three technologies at once (2G / 3G / 4G), and they all operate at different frequencies and different principles, there can be a number of reasons for interruptions in communication.

Why is MTS not catching the network today?

If the signal has always been stable, but interruptions suddenly appeared, it can be assumed that technical work is being done on the network. The operator regularly upgrades the network, therefore, on the scale of Russia, several "white spots" appear daily on the coverage map.

In addition, common causes of no or poor signal quality are:

• Bad network architecture. If the operator has saved on base stations, or the terrain has difficult terrain (you are in a lowland), there is a high probability of a lack of signal.
• Obstacles in the signal path. For example, the signal often disappears inside monolithic houses, since the reinforcement in concrete partially shields the radio signal. Therefore, sometimes it is enough to come closer to the window.
• Infrastructure damage. If the base station fails or the cable infrastructure is damaged, the signal may also disappear.

Why the phone can not catch the Internet from MTS?

Quite often there is a situation when the MTS voice communication is functioning normally, and the data transmission service is unavailable. This may be for the following reasons:

• There are flaws in the network architecture, due to which the data transfer service de facto cannot work normally.
• The network is overloaded and cannot withstand the influx of subscribers. Sometimes it helps to simply restart the communication module (turn on and off the "airplane" mode on the smartphone).
• 3G/4G networks are simply not available. A subscriber accustomed to high speed may decide that the Internet does not work at all when you have to wait for a response for 20-30 seconds.
• The account has run out of money or service packages have been exhausted.

Why does MTS not catch the 3G network?

Problems with access to the 3G network are a common problem among MTS subscribers. The most common reasons:

• Lack of "carpet" covering of the third generation. Unlike GSM, 3G is available only in cities, on the largest highways and in some small towns.
• Bad radio planning. Often a situation arises when the phone displays the 3G or HSPA icon, but in fact the network does not work. This means that there is no real coverage in your location.
• Sometimes the signal is so low that the waiting time for a response increases significantly. And if the data transfer rate itself is satisfactory, then the response time can reach several tens of seconds.

Why does MTS not catch the 4G network?

4G coverage of MTS has even more "white holes" than 3G. Even across the territory of Moscow, there are many zones where there is no reliable signal, not to mention the regions of Russia. Therefore, the most likely reason for the lack of a 4G signal is the banal lack of coverage.

In addition, the 4G network does not have the best indoor coverage in Moscow, therefore, in many residential and commercial buildings, the connection may be lost.

Why does the MTS sim card not catch the network?

In conclusion, we note that sometimes the problem is in hardware elements: a SIM card or a phone. You can verify that there are hardware problems by trying to put another SIM card into your phone, or by putting your SIM card into another phone.

The situation when the phone does not see the SIM card can occur with a subscriber of any Russian operator - MTS, Beeline, MegaFon, Tele2, or Yota. This can happen for a number of reasons, not always dependent on the person using the device. Today we will tell you why the phone may not see the SIM card, and what needs to be done to solve the problem.

We find out the reason

The main thing to do if the phone does not see the SIM card is to find out the reason. The cause of the problem can be both the device itself, in which the SIM card is used, and the card itself.

It is necessary to determine why this happens - the phone does not see the SIM card at all, or the operator's network is just unavailable. It's easy enough to find out. If you installed a SIM card in the phone, and the device writes that the SIM card is not installed, then this means that the phone does not see the SIM card. If the phone does not display a notification about the absence of a card, but at the same time does not see the operator's network, then this may be due to ...

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The first thing to check is the signal indicator on the phone. If it shows a low level, then you need to go to a higher open space. If the signal is still bad or even worse, the network is not caught at all, then you need to understand the problem.

Faulty SIM card

Often the problem lies in the SIM card, which is responsible for communicating with the network. Items tend to fall into disrepair and "sim cards" are no exception. Especially if the card is often rearranged from phone to phone. This may damage the contacts. In this case, the phone simply cannot register on the network.

If the problem is in the SIM card, then diagnosing it is easy. Take another card and insert it into your phone.

Read: "What to do if the phone does not see the card"

If the problem has disappeared, then the card needs to be changed. Go to the nearest mobile operator's customer service center and change to a new one.

...

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First you need to check if there is any icon that the network signal is generally in this moment yes, as it often happens that a network is selected that is not supported by the operator. The necessary information can always be found in the settings. However, it may also be that the cause must be sought in the telephone itself.

The phone does not search for a network or has stopped catching it

It may happen that the amplifier is out of order, meaning the power of the transmitter. If this problem occurs, it is necessary to replace the components. Unfortunately, this work cannot be done on your own - you will need the help of a specialist. In this case, you may need to replace:

Transmitter power amplifier;
- antenna;
- SIM card reader;
- SIM connector;
- SIM card holder;
- SIM card controller and others.

Lost network

A possible cause may be a failed radio path. This device quite complicated because...

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Why the phone does not see the Wi-Fi network of the router

If you came to this page, then most likely your phone has stopped seeing the Wi-Fi network, or networks. It can be a home network, somewhere away, a public wireless network, etc. The problem is that the network we need does not appear in the list of available ones on the phone. He simply does not find it, does not see it, and, accordingly, it is impossible to connect to such a network. It is not uncommon for a mobile device to not find a specific Wi-Fi network. Which, for example, a laptop sees and connects without problems. Or it may be that the phone does not find any network, but other devices see them and work fine with them.

In this article, I will try to collect all the most popular causes and solutions that can help you solve this problem. As usual, first it is desirable to find out what the problem is: in a mobile phone, or a Wi-Fi router. If the problem is with the Wi-Fi network at home, then we have a better chance of fixing everything, since we have access to...

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I continue the topic “how to fix a phone at home” or “cell phone repair tips for beginners”. Every master with experience knows that if a mobile phone does not see the network, then the first thing to do is to check whether automatic range selection or manual network selection has been disabled in the settings of the phone itself, or whether someone has set the UMTS mode for an hour .. And only then starts looking iron breakdown. All these parameters relating to the network in most cases should be set to automatic. Automatic network selection (dual), automatic operator selection, etc. But there are times when children or someone else climb the phone's menu and accidentally or on purpose (I don't know) reset the settings. Today I had such a repair, and he prompted me to write this article. And I want to note that such cases often happen.

In this case, all you need to do is go to the phone settings, find the network settings and set everything there to automatic. Each phone has its own menu, so ...

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The phone does not catch the network: where to look for the reason

If your phone does not catch the network - constantly or periodically - the reason may be hidden, as you might guess, either in the SIM card or in the device itself. Moreover, with the first option, the problem can be solved independently, with virtually no cost. Maximum - with an appeal to the service center of the mobile operator. In the second case, the possibility of a malfunction of certain components of the device is not ruled out, which requires the intervention of experienced specialists.

But before that, make sure that you are in the coverage area of ​​your operator's network. Although we live in a fairly civilized country, problems with the signal, alas, are not uncommon. It even happens that within the same space the phone does not catch the network, although two steps earlier everything was fine. This is a feature of signal transmission, and nothing can be done about it. You can, of course, try to shame the operator. But, as practice shows, everything will end with the fact that a polite operator girl will say ...

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Sometimes it happens to owners of smartphones on the Android operating system that the phone stops catching the network. To find out why the smartphone does not catch the network, first of all you need to understand whether there is a problem with the SIM card and the mobile operator or a problem in the device itself.

It often happens that the smartphone does not catch the network due to poor coverage of the cellular operator, or simply this frequency is not supported. For example, a 4G (LTE) signal catches mainly only in major cities and does not work outside the city at all. Also, the problem may be in a broken SIM card. In any case, you first need to check the health of the network with different mobile operators. If not one of them did not work, then read below.

The phone bought in China does not catch the network.

What phone do you have? If you bought a phone from China and, for example, it does not catch 3G or 4G, then the problem is that the frequencies in China and Russia do not match, you cannot do anything here. That is why everything...

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There are several more reasons why the phone does not catch the network. In order to understand this kind of nuances, it is not necessary to be a very advanced user, it is enough just to have a cellular device at hand.
Let's start with the fact that the reasons why the phone turns out to catch the network can be different. You may have to resort to a number of complexes to solve this problem. The main thing is to carefully follow the sequence of execution certain actions.
Pay attention to the screen of your phone. Does he catch the net at all? Is there any clue, however small? There is? Excellent. It means that just the operator you have chosen cannot support this particular network. Eliminating such a defect is quite simple. Every phone has a menu. Go there and click on the tab related to network settings and options. Then select automatic search for networks and save changes. The phone still does not catch the network? Then you have to set it up yourself....

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It is rare that no one has encountered such a problem. It seems that everything should be in order: the phone is working, the SIM card is inserted, the contract with the provider is concluded - but there is no access to the Internet. And just about he was still there, and after a minute - as if it had not happened. A familiar situation, isn't it? If the Internet does not work on your phone, then do not despair and rush headlong to the service center.

With very little effort, you can really cope with the problem and without someone else's help. the Internet on the phone is configured a little differently than on a regular personal computer, and this often causes difficulties for users. What interface elements are responsible for setting up the connection? What are possible reasons network access denied? We will consider all these issues in our note. The most banal reasons get the least attention. And absolutely in vain. Here is a short list of them:

The Internet on the phone is disabled for non-payment. That is, you have a negative balance in your account....

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In most cases, the problem of signal deterioration is solved at home, or by contacting a mobile operator. But in some situations it may be necessary service repair, replacement of individual components. Let's take a look at the most common reasons why mobile network becomes unavailable on Android, as well as methods for solving them.

The reason is "simka"

Without a mobile network, a smartphone turns into a fancy toy with which you can listen to music, watch a movie and play an application. It is no longer possible to call from it, which means that the main function of the mobile phone is lost. The first and most common reason for the absence mobile communications is a problem with the sim card. In this case, several scenarios are possible:

The SIM card is blocked by the operator. As a result of a long period of inactivity, the operator intentionally blocks the SIM card, and, accordingly, such a card cannot receive a signal. The SIM card is damaged. With long...

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Sometimes you may encounter a problem when your phone does not see the SIM card network. Do not panic and start blaming Beeline or MTS for everything, which, perhaps, have nothing to do with your case.

The first step is to make sure that the SIM card is securely fixed in the slot and has no play. It happens that after self-cutting the card or as a result of the fall of the phone, contacts begin to move away.

But what if the SIM card "sits tightly" and the first option can be excluded?!

We offer several ways to solve the problem:

Remove the card and take an eraser with which you need to carefully wipe the chip itself. Thanks to mechanical friction, you can easily and quickly remove the formed film that prevented good contact. You can get rid of the rest of the eraser with medical alcohol. Moisten a piece of cotton wool with it and gently remove excess debris. This method usually helps if your phone sees ...

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If Android does not see WiFi network, the first step is to understand on which side the problem arose: on the device that distributes the wireless network (modem / router), or on your Android phone / tablet.

This article is suitable for all brands that produce Android smartphones: Samsung, HTC, Lenovo, LG, Sony, ZTE, Huawei, Meizu, Fly, Alcatel, Xiaomi, MTS and others.

Determining the source of the problem

The first step is to determine if Android sees other Wi-Fi networks. Try to distribute the network from a laptop, from an iPhone or another phone, go to public place with free Wi-Fi.

If there were no problems with finding other points, then the problem is definitely in the network that Android cannot find. If the device does not catch any points, although other phones show their presence, then look for problems in the system and the hardware component.

Android does not see any Wi-Fi networks

If the device does not detect wireless points, although it previously saw them without ...

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Each person at least once encountered a problem when the phone does not catch the network. Such a nuisance can manifest itself at the most inopportune moment. On the Web, users often discuss this topic. Surprisingly, the brand of the phone does not affect this at all. This can happen both with an expensive "iPhone" and with a cheap "Chinese".

However, if the phone does not catch the network, this does not mean that the device is broken. Before drawing conclusions, you need to check if there is a cellular network signal. The corresponding icon should be displayed on the main screen. It often happens that the user selects a network that is not supported by the operator. All necessary information about it is in the gadget menu. And this is only one reason, but there are others that will be discussed in this article.

Faulty SIM card

Often the problem lies in the SIM card, which is responsible for communicating with the network. Items tend to fall into disrepair and "sim cards" are no exception....

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Unlike a wired network, a Wi-Fi connection requires additional authentication, since the connection to the network within the range of the signal emitted by the router is public. Here, electronics is responsible for the Internet connection, and there can be many reasons why the phone does not see wifi at home: from provider problems to router malfunctions. However, this problem is extremely common, and we will consider the most “popular” reasons that the phone does not connect to home wifi in this article.

Why the phone does not connect to wifi: we establish the correct "diagnosis"

So, if the phone does not catch Wi-Fi from the router, it is worth checking:

1. Is the router "hanging"?

Indeed, some reasons that the phone does not see Wi-Fi can be safely called mystical. After all, that's what they're all called. unexplained phenomena? In fact, without exception, routers periodically refuse to fulfill the tasks assigned to them ...

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What to do if the phone does not catch the network?

Is your phone not picking up the network? This is a fairly common problem that many users have had to face. First of all, you need to pay attention to whether the display shows at least some level of signal reception. You may have selected a network that is not supported by your carrier. Correcting the situation in this case can be quite simple. Go to settings and select the required network. If this does not help, and the phone does not find the network, then the reason should be sought in the device itself. Now let's figure out why the phone does not see the network?

Why does not catch the phone's network?

Why is there no network on the phone? There are several reasons for this. Consider the possible options:

1. the phone has stopped catching and is not looking for a network if the transmitter power amplifier is out of order. If this part is out of order, then it will be possible to resume work only after complete replacement component. It is impossible to reproduce the replacement at home. This task...

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Sometimes, when a user wants to call another person, the call may have a problem establishing a connection to the cellular network, resulting in a message on the screen of a smartphone or tablet: "Mobile network is not available."

Owners of absolutely any mobile operators may encounter a similar error: MTS, Megafon, Tele2, Beeline, etc.

In this article, we'll look at:

Why does the phone write that the mobile network is unavailable, what does it mean; What to do if the phone says: "Mobile network is not available."

The main reasons why the mobile network may be unavailable and what to do

The main reasons why the mobile network may be unavailable and what to do:

Device failure. There may have been a glitch in the operating system on your device. In this case, the Internet can work.
What to do: in this case, you need to reboot your phone / tablet. Poorly installed SIM card. If the SIM card is not installed correctly,...

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The network disappears on a smartphone (tablet) Android | The phone or tablet is weakly catching the network, or there is no network at all.

Many users are faced with a problem when an Android phone or tablet starts acting up. It seems that it didn’t fall anywhere and didn’t “water” with anything, but it doesn’t work the way it should.

For example, the device has trouble receiving the network. The reason for this may be:

1st: Software failure - i.e. the problem is a software glitch

2nd: Hardware failure - i.e. the problem lies in the "hardware" (i.e. - replacement or restoration of spare parts of the gadget is required)

However, do not rush to get upset - in 90% of cases with network problems on an Android-based smartphone or tablet, a software failure is to blame, which you can easily fix on your own.

Fixing a software bug:

Method 1. Pretty simple - go to "settings", find there "backup and reset", in which you select a complete reset ...

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11 reasons why the phone does not see the SIM card

Even if your smartphone is just a super-sophisticated “bomb”, without a working SIM card, it is, alas, nothing more than a toy.

In order for the phone to play its own leading role, many "participants" are involved: this is a sim card, and a slot, and a sim connector, and contact groups. But Simka is, without a doubt, the main character here.

The interaction of all these elements is the main condition for the phone to remain a phone and fulfill its main purpose. But what if the connection between them is broken, and the phone no longer sees the SIM card?

The reasons why the phone does not see the SIM card, as it is probably not difficult to guess, are hidden either in the SIM card or in the device itself. The first, as a rule, is solved much easier and faster - by replacing the card with a new one from your mobile operator, the second, often - through a service center.

Why is the SIM card not working:

1. the card has expired

This happens if you take it for a long time...

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Hello, dear visitors of androidium.ru! Quite often with tablet computers and mobile phones one bad thing happens. On a seemingly working device, the network or the Internet suddenly disappears, while the phone or tablet loses connection. Why does the network disappear? To date, there are quite a few manufacturers of mobile gadgets: ASUS (Asus), Acer (Acer), Alcatel (Alcatel), Dell (Dell), Digma (Digma), Explay (Explay), HTC, Huawei, LG, Lenovo (Lenovo), Nokia (Nokia), Philips (Philips), Prestigio (Prestigio), Samsung (Samsung) or Sony (Sony). We dare to assure you that problems with the Internet and the network can occur with a device of any manufacturer. If for no reason at all on your tablet or phone the Internet connection or mobile network is lost, then our publication may help to understand the cause of the problem.

It's no secret that modern phones can have three types of communication: 2G digital cellular, 3G broadband digital cellular, and the ability to ...

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Can't see network. Although it determines the network operator.

HTC Radar
OS and firmware: WM 7.8 (H2O)
Description of the problem:

Actions have been taken:
, People do not tell me what could be the problem?
The phone does not see the network. You insert a SIM card, it determines the operator, but the networks are just 0
Somehow they gave me this body a long time ago, I didn’t use it, but now I’ve launched it and that’s it ((
Firmware as I understand it when you turn on custom H2O, WM 7.8

Maybe it's because of the firmware?
Or the owner of the phone could somehow remotely block IMEI so that he could not use the phone, does not determine the network.
Or maybe it's in the gland? Antenna not working?
There is no back cover, I inserted a stick there)) so that the power button is pressed. To turn on the phone.

Post has been editedDonald Dark - 03/02/16,...

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What are the reasons for poor communication, even if a fairly close location with the towers is observed, we will consider in detail the causes and solutions to these problems.

First of all, of course, you should make sure that the reasons are not a non-working SIM card, as well as the location is not beyond the possibility of the nearest tower.
All phones operate at certain frequencies, just like the towers that transmit a signal to you, let's analyze this in more detail:

Mobile devices are produced with support for 4 main frequencies: 850 MHz, 900 MHz, 1800 MHz, 1900 MHz.

Previously, phones were classified depending on the frequency, now single-band phones are not produced, but we still have the opportunity to select a frequency with hardware support for all frequencies.

Depending on the number of bands, phones are divided into classes and frequency variations depending on the region of use.

Let's look at some features:

Dual-band (Dual Band) - for...

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The phone "does not see" the network - a constant message on the phone's display like: "no network" or the like and, accordingly, the absence of strips (marks) of the GSM network electromagnetic field strength indicator. First you need to check if the phone finds the network in manual search mode. If the networks are found, it can be assumed that the receiving path of the GSM module is in order and the phone cannot register in the network, since it is not possible to send a registration request. The fault should be sought in the transmitter, power amplifier (Power Amplifier), as well as in the antenna switch.
If the phone does not find any network, the check should be started sequentially as the signal passes, that is, from the antenna to the transceiver.
Produced visual inspection antenna and contact leads of the antenna circuits of the telephone board for the absence of oxides, deformation or absence of springy contacts for connecting the antenna, as well as breaks in the antennas, made in the form of a thin loop, ...

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Rhythm modern life requires us to constantly be in touch with relatives and colleagues, so the failure of the telephone can cause a number of problems. So, if the SIM card does not work, you will not be able to call anyone from the contact list, and this situation is one of the most common reasons for contacting a service center.

Phone SIM card malfunctions

If the cell phone does not see the sim, then the problem lies either in the gadget itself or in the card. It should be noted that initially the technology of SIM cards was created for their use in payment systems, therefore, maximum attention was paid to the level of reliability of the element, and yet its failure is quite possible.

Some problems with a SIM card are solved quite simply and unambiguously - if it has expired or it has been damaged, then the only way out is to contact the operator for a replacement. But more complicated cases are also possible.