The connection disappears when I answer an incoming call. The Samsung Galaxy DUOS network disappears - it's simple! Auto detection function

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Let's consider today the problem when the Wi-Fi network is unstable, and when the connection to the Wi-Fi network is periodically interrupted, or the Internet connection is lost. It seems to me that this is even worse than when the Internet does not work at all. Because the problem is not clear, everything seems to work, but not as it should, the signal disappears, devices turn off, and other incomprehensible moments. It’s just that when something doesn’t work, it’s at least clear where to look for a solution, but in such a situation nothing is clear at all.

What causes an unstable Wi-Fi connection:

Periodic disconnections of devices from the Wi-Fi network. Or the Internet simply breaks for a while (), and everything starts working again. A very popular problem that causes a lot of inconvenience. For example, a laptop is connected to a Wi-Fi network, and the Internet is working. But periodically a yellow one appears near the connection icon Exclamation point, and the Internet disappears. Loading files gets stuck, etc. And, as a rule, the connection is restored after a while.
Devices do not connect to the Wi-Fi network the first time, or do not see the Wi-Fi network.
The Wi-Fi network completely disappears and appears.
Very low speed Internet by wireless network (everything is fine via cable).
When the Wi-Fi connection only works close to the router.
The wireless network signal level is constantly changing.

This, of course, is not the entire list of problems that are associated with unstable operation of wireless networks. There may be many more. Very often, Wi-Fi works fine for a while, and then problems begin and go away again. You may also notice the appearance of problems, for example in the evenings, or at other times of the day.

If you have something similar, and you seem to have an Internet connection, but you can’t always use it ( use without any problems), then now we will try to fix everything.

Changing the wireless network channel when Wi-Fi is unstable

This is the first and most important tip that you should definitely try. We know that every Wi-Fi network operates on some channel. If there are many of these networks, then they begin to interfere with each other, and interference appears. As a result, Wi-Fi is unstable. Well, and various incomprehensible problems that I wrote about above, and which you have most likely already encountered.

Need to change Wi-Fi channel network in the router settings. Details about channels, about finding a free one and about changing to different models routers, I wrote in a separate instruction:

You can try asking some static channel (if you have Auto), or vice versa, set Auto if a static channel was selected. In the article linked above, I wrote about finding the freest channel using the inSSIDer program. You can use it.

You just need to go to the router settings, go to the tab where you configure the wireless network, and in the Channel item change the channel. This is what it looks like on Tp-Link routers:

And on Asus routers:

After each channel change, do not forget save the settings and reboot the router. Be sure to try several options. It should help.

As for interference, it can be created Appliances. Do not place the router near microwave ovens, cordless phones, etc.

The Internet is cut off via Wi-Fi: router firmware, and other tips

Almost always, such problems in the wireless network occur due to the router. Not rarely, this is due to the firmware. Therefore, I strongly recommend updating the firmware of your router. We have instructions on our website for all popular manufacturers. Here's an example:

It is also possible that the wireless network may be unstable due to some technical problems with router. Something with the board itself, or the power adapter. By the way, it is power adapters that very often cause such problems. The router just doesn't receive proper nutrition and connection breaks appear, etc. Well, strong changes in the power supply can affect the operation of the router. If the Internet goes out after you put some kind of load on the router (online videos, games, torrents, connecting new devices, etc.), then this is usually due to an inexpensive (not powerful) router.

Need to eliminate problems on the ISP side. It may well be that the connection is broken on its end, and the router has nothing to do with it. It’s very easy to check, just connect the Internet directly to your computer and check its operation.

For many people, the connection breaks down in those rooms where there is very bad signal Wi-Fi networks. When, for example, only one division of the network signal remains on the device.

In such a situation, you need to increase the range of your Wi-Fi network. We have an article on this topic:. Or, install . After this, problems with Internet interruptions should disappear.

And if your devices at home find a lot of available networks that operate at a frequency of 2.4 GHz (as is most likely your network), and changing the channel, and even changing the router does not produce results, and the Wi-Fi network is very unstable, then this problem can be solved by purchasing a router that supports operation at a frequency of 5 GHz. This frequency is practically free. I just know a case where there were a lot of wireless networks in the house, and Wi-Fi was simply impossible to use until they switched to the 5 GHz frequency.

If the Internet disappears on only one laptop

And of course, it’s not uncommon for all devices to connect and work with a wireless network without any problems or disconnections, but one device keeps disconnecting, losing connection, etc. It’s not hard to guess that most often this device is called a laptop and runs on Windows.

In such cases, it is necessary to update the driver wireless adapter. I wrote how to do this. It is possible that the problem may be in the hardware. And it appears very often after disassembling the laptop (cleaning dust). Why is that? During assembly, the antenna that is built into the laptop often suffers. These are the problems with working with Wi-Fi networks. Very often, after this the Internet only works near the router itself.

Update: changing Wi-Fi network properties

Open Network and Sharing Center shared access" and click on your Wi-Fi network. In the new window, click on the "Wireless network properties" button and check the box next to "Connect even if the network does not broadcast its name (SSID)". Click Ok.

If it doesn’t help, and Wi-Fi continues to fall off, then in the same window, on the “Security” tab, you can click on the “ Extra options" and check the box next to "Enable Federal Information Processing Standard (FIPS) compatibility mode for this network."

You can restart your computer. Thanks to Alexander for this advice. He suggested it in the comments to this article.

Here are some tips if you have any: interesting information on this topic, personal experience, then write in the comments. You can ask questions there, I will definitely answer!

If the network suddenly starts to disappear on your phone, it does not see it or cannot detect it mobile operator, in some cases decide this problem you can do it without help mobile service. It is quite difficult to independently determine the reason for this network behavior on your phone, but you can take a number of measures that will eliminate the problem partially or completely. Such measures include changing the settings inside the phone, checking the phone for breakdowns, contacting your operator directly mobile communications. First, take a look at the network icons in the top corner screen, they can usually tell you a lot. Then start studying this article.

Why the phone stopped seeing the network - the first reason

The very first reason is a breakdown of the SIM card slot itself inside your phone. This happens if you inserted a SIM card carelessly, dropped the phone, or scratched it on the side of the SIM card slot. This is quite easy to determine if the phone does not respond at all to turning the SIM on and off: it simply does not see it.

In this case, you can try to move the SIM card to another slot, if your phone has one. If the sim works and the network appears, then you have solved the problem. You should take your phone to a repair shop and have the slot fixed.

If this does not help, and the problem lies elsewhere, you should turn to other points in the article.

Why did the phone stop seeing the network - the second possible option

Like all equipment with an installed operating system, the phone could suffer some kind of system error. You can try to reinstall the firmware yourself using tools on your computer, perhaps this will fix the problem.

You can download official firmware on the developer’s website and install it yourself using the Odin program.

Why did the phone stop seeing the network - phone settings

Try to set correct settings network to set the access point yourself. Follow the algorithm:

Go to your phone's settings by opening the device tray and clicking on the gear icon in the upper right corner.

In the settings you need the “Mobile networks” item, find it and click.

If your SIM is not identified in any way, but it is definitely inserted into the device, moreover, the phone sees it, then it makes sense to enter the “access points” item.

At the very top you will see the “Add” button. You can use it to create your own access points if they were not sent to you automatically when you turned on the SIM card.

Go to your mobile operator's website and find the network access point parameters for manual entry.
Transfer them to this form.

Save the settings and exit this window.

Now click on “search for networks”, after selecting the desired SIM card if your device has several of them.

See if the “Data roaming” option is checked. Switch its position to on and then back to off. select Options mobile transmission, if necessary.

As you may have noticed, the main reasons for the lack of network on the phone are as follows: technical problems in the form of a broken antenna, SIM card slot or other parts of the device; wrong specified settings networks and lack of port; phone system error, which can be solved by manually changing the firmware.

Sometimes you can solve them yourself, but sometimes you have to contact service and pay for replacement components.

Poor mobile signal reception or simply “no network”, quite common problem when working with modern smartphones. In some cases, it “does not catch” due to the large distance to the towers cellular communications, other malfunctions occur when there are errors in the operation of the software or hardware parts of the device.

Some problems can be solved by changing the phone settings; to resolve others, you need to contact your mobile operator or service center manufacturer.

All reasons can be divided into several categories: hardware and software.

Hardware

Failure of the SIM card slot. A malfunction can happen for many reasons - dropping the phone, carelessly connecting the SIM card, or moisture getting into the case.
Damage to the SIM card itself is quite common reason. This may occur if the SIM card is constantly moved from one device to another or is handled carelessly.
Disconnection of the antenna loop or breakdown of other modules associated with connection to the operator. In this case, the device stops picking up cell towers and the network constantly disappears.

Software

Malfunctions in the operating system that caused the communication module to turn off.
Incorrect cellular settings in the smartphone settings.
Infection of the device with malicious software that can affect signal reception.

SIM card malfunctions

If you suspect that your SIM card has failed, first try installing the problematic card in another device. Everything works fine - that's not the problem. If your smartphone has 2 SIM slots, move the card from one to the other.

This procedure can be performed independently and does not require disassembling the phone case. If you determine that it is the SIM card that is broken, contact the service center of your mobile operator for help. Registration services new card usually free when the old one is out of order, but a passport may be required.

Communication module failure

As a result mechanical impact on the smartphone body, the modules responsible for receiving the network signal can get damaged.

Disabling the loop SIM slot or antennas are a fairly common cause of problems. To fix it, it is best to contact a specialist, since any tampering with the device’s body will void the warranty.
Replacement of the antenna with a low-quality Chinese analogue during repairs. Some “masters”, hoping to save money, use the cheapest modules. This leads to deterioration in the quality of signal reception and rapid failure of the board.

Provider failure

In some cases, it is enough to wait about an hour and the problem will go away on its own. There is an overload of equipment on the side mobile operator, as a result of which the entire grid “lays down”. Technical specialists react very quickly to such accidents with cell towers and correct the situation in a matter of minutes.

Checking the settings

Android and iOS devices may “lose” the signal after errors in the operating system. Below is how to set up the network on your phone.

Open the notification shade and go to the device settings.
Go to the " Mobile points access" and find the list of SIM cards. If your card is not detected, check whether it is installed correctly in the slot. Open the "Access Points" menu.
Click on the "Add" button. In the window that opens, enter the parameters for the current configuration.

Important! All necessary data can be found on the mobile operator’s website. If you do not find information on the web portal, contact any of the offices and request data from consultants.

Save the information and check whether the cellular signal is working (as an option, whether “sticks” have appeared in the status bar of the device).
Tap on the “Search...” item. The phone will scan for available access points. The procedure can take from 30 seconds to several minutes on older Android smartphones.
After completing the search, click on the name of the mobile operator whose SIM card is in the phone.
Check if the “Data in roaming” checkbox is checked. Try turning the radio button on and then off again.

Reset

After incorrectly flashing the device, the network may periodically disappear or work intermittently. In this case, it is necessary to carry out full diagnostics device and return the factory firmware.

In “especially advanced” cases, one cannot do without full reset settings.

Go to your smartphone settings.
Open the “Backup and reset” tab, tap “Reset settings”.

Important! Do not check the box next to “Delete all user data and clear internal memory.”

Confirm the reset. The procedure may take from 15 to 30 seconds, depending on the load on the phone's processor.

Roaming error

The signal may disappear when weak signal or incorrect setting roaming parameters. To resolve most problems, simply restart your smartphone or reset your network settings. How to do this is described in the previous paragraph.

Incorrect firmware

If you flash your device with incompatible firmware or perform the procedure incorrectly, the communication module drivers may fail. At the same time, the message “No network” will be displayed on the screen. In some cases, it will be enough to reflash the gadget back to the factory one iOS version or Android, sometimes you will have to turn to specialists for help.

Conclusion

Problems with cellular communications occur due to various reasons– in some cases the fault lies with the operator, but most problems are caused by user actions. If malfunctions are detected - cell phone it says the mobile network is unavailable, it is best to contact a service center, but a normal reboot, reset and replacement of the SIM card can be done at home.

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Editor's response

Smartphones may lose mobile network and wi-fi network. In case of loss of the cellular operator's network, the reason may be unreliable network operation in a certain mode. Most operators support 3G network mode, but the signal from such a network is not reliable everywhere. Due to the weak 3G signal in some regions, the network mode changes automatically and in this case, signal loss is inevitable. To set a weaker but stable signal, you need to enter the menu and then select - Menu -> Settings -> Wireless networks -> Mobile network-> Network mode -> “GSM only”.

Network loss can also be affected by:

Function automatic detection

Some phones do not have the auto-network detection feature enabled by default. In case one available network disappears, then the connection disappears along with it, and you need to restart the phone. To activate automatic network detection, you need to enable this function in the settings.

Incorrect network connection

If your device allows you to select a network standard (4G/3G/2G), try switching to another standard. To do this, go to your phone settings and select the desired network manually and reboot the phone.

SIM card wear

The cause of network loss may be bad contact with SIM card. You can check if the card is working properly by inserting the SIM card into another smartphone. “Perhaps you have an old SIM card, or the card has failed for one reason or another, or you may have cut it crookedly. The simplest thing you can do is change the card. Sometimes it can help to simply pull out and insert the card back, suddenly it has become a little decentralized. If you changed your card, got a new one, which by the way is free, and still the problem continues, but on other phones of the same operator in the same place where you are, everything is fine, then the problem is mobile device. In this case, you need to contact a service center or change your phone,” says gadget expert Ilya Korneychuk.

Poor antenna reception

Inside the smartphone there are the main antenna elements. Over time, they may fail due to oxidation, deformation or lack of springy antenna connection contacts, as well as breaks in the thin antenna cable. If the cable breaks, you need to contact a cell phone repair service center.

What to do if your smartphone loses wi-fi?

Often the reason for network loss lies in the router. To check its operation, you should find a free access point and connect to it. If the connection is stable, then the problem is in the router.

Settings failed

You need to look at the router settings and check if it is enabled DHCP server. If this function is turned off, then your device simply will not be able to receive the address and connect. In the router settings, go to the “LAN” section and enable DHCP by checking the appropriate box or selecting “Allow”.

Router freezing

The smartphone may lose the network due to a banal freezing of the router. This can be easily checked by rebooting it. If this does not help, then the problem lies in its firmware. In this case, download from the official website updated version Software for your access point and install it.

“As for the loss of the wi-fi network, the problem is most likely in the router. You should reboot it. By the way, I strongly recommend installing the latest firmware with the latest security patches on your router. For routers from normal companies, such firmware is regularly released. The router needs to be protected regularly to increase security so that you don't get hacked. Well, of course, you should install strong password. This is already beyond the scope of signal loss. It also happens that the phone and the router are completely working, but they periodically lose each other. In this case, you should turn on and off the wi-fi network on your phone and turn on and off the router itself,” says Korneychuk.

Software glitch

Sometimes the problem with connecting to a wireless network occurs due to a malfunction software after updating it. In this case, the first thing you should try is to general reset data. Enter your smartphone settings. In the " Accounts» Find the item “Backup and reset”. It is worth considering that after performing the reset, all data will be deleted, so you must first save it to your computer.

“The Internet periodically disappears”, “Yesterday I used the Internet, but today the connection is lost”, “The program does not want to connect to the Internet” - these and many other similar complaints can be heard from users who, for one reason or another, are faced with the problem of lack of connection with global network. It's not pleasant to receive similar problems, if your activity is related to daily visits to the network, regardless of whether you use it for communication, work or for entertainment purposes. There can be many reasons for the lack of connection to the Internet, and I will try to give general tips on how to eliminate them, but first you need to figure out why your Internet still disappears.

I divided the whole range of reasons why you may not have Internet into two groups: external and internal. TO external reasons I include those that lie outside yours computer system and which are very difficult to solve on your own. Usually, to restore breaks due to external reasons, you have to contact various service organizations. Internal ones are quite amenable to solving on your own, since they are within the coverage area of your own computer system.

External reasons for Internet shutdown

1. Problems with the provider

I will probably put this reason for the lack of communication first among others. The provider is an intermediate link between you and the global network. Everything you request or receive from the network will necessarily go through the provider. It is this organization that will be responsible for connecting to the Internet in front of you and in most cases, in case of unclear connection failures, you need to contact the technical service of your provider. Of course, not all problems of lack of Internet can be solved through the service of technicians, since the culprit of connection breaks may also be your system with a set of programs installed on it, as well as their settings. But believe me, in most cases, the issue of restoring communication via the Internet channel lies within the competence of your provider. The reason for this may be damaged wires, broken equipment or even unscheduled work that they forgot to warn you about.

It would also be a good idea to check the balance of your Internet account, to which each provider must provide access. Depending on the chosen tariff and internal rules for providing access to the Internet, each organization can set its own limits for your balance, within which you can continue to use the Internet channel. As soon as the balance goes out of these limits (for example, it becomes less than 0 rubles), access to the Internet is automatically blocked by the provider’s system. It comes to funny cases. A similar thing happened to me when I used Internet access through the MTS provider. One day my account balance was about 5-6 rubles, after which the Internet stopped connecting at all. At the same time, in technical service argued that no sanctions should follow from their system for any positive balance. However, as soon as I topped up my account with another 100 rubles, the connections immediately returned to normal.

2. Lost communication channels

Also, a frequent reason for a suddenly lost connection may be hidden in a violation of the integrity of physical channels located within the building/apartment/room where the Internet channel is installed. For accurate diagnosis similar reasons you need to know the type and features of the physical communication channel through which the Internet reaches you within your premises.

If it is a cable type channel (for example, telephone, television coaxial or twisted pair), be sure to check the integrity of the corresponding wires that are laid in your apartment. However, it must be added that in some cases it is not possible to check the integrity of the cable without special equipment, however there are a number of diagnostic methods cable connection and without professional tools.

A telephone connection, often used with ADSL or Dial-Up Internet connection channels, can be diagnosed using regular phone, which is connected instead of a modem. The absence of beeps in the handset will clearly indicate a damaged line.

Twisted pair cable, which is usually connected directly to network card your computer is even easier to diagnose. In most cases, all you need to do is make sure that the RJ-45 port indicator on the network card where the twisted pair cable is connected is green.

In most cases, the absence of light from the indicators indicates a malfunction in the cable itself or its connecting parts. However, if you do not have the proper experience and knowledge in troubleshooting the above-described faults, it is better to contact qualified technicians, who can be invited through the provider’s service or check telephone contacts such.

Internal reasons for Internet shutdown

3. Faulty equipment

Quite an insidious type of problem. More than once I have come across cases where apparently functional equipment cannot fully connect to the Internet or operates with periodic failures due to internal technical problems that are quite difficult to diagnose without special knowledge. In this paragraph, I am referring to modems and network cards, which are intermediaries between your system and the provider’s equipment and which you use to connect to the Internet.

You can make sure that the modem or network card is fully operational through the system equipment manager. For this right click mouse on the “ My computer” go to item “ Properties" If you have Windows 7, then find the link to the “” window on the left; if you are the owner of Windows XP, then first go to the “” tab Equipment”, where you can see the “” button.

Now find your modem in the list or network card and make sure they don't have any yellow exclamation marks assigned to them. If your network equipment(check with your provider for the specific type of equipment) you do not find in this list, then most likely the device has failed. If there is a yellow exclamation mark next to the description of the device, it means that it is installed incorrectly in the system and you must first reinstall the drivers for it, which are supplied separately by manufacturers and sellers on disks, or on the manufacturers’ websites on the Internet.

4. Incorrect settings

Settings network connection to the Internet in operating system carried out at the initial stage of work. Usually you don’t have to return to them after a one-time edit. But it may happen that the settings in the system are mistakenly reset for various reasons. The reason for this may be both the operating system itself and the programs installed in it, including viruses. Human factors cannot be excluded, especially if the computer is used by several users. It may also be that the provider simply changed the Internet connection parameters, but for some reason you were not notified of this.

In any case, it would be correct if you audit the connection settings. To do this, you need to obtain these settings from your provider, or find them if they have already been provided to you. Most providers provide their users detailed instructions for setting up connections. You will only need to “go through” all the points of such instructions again to check the existing connection, or create and configure a new connection, following the instructions in the document. However, I cannot describe more detailed actions due to the many various options to set up such connections with different providers.

5. Blocking viruses

Another insidious reason for Internet connection interruptions is becoming more and more frequent. Today, there are many types of malicious programs that, hiding in the system, selectively block connections to certain sites or even all Internet traffic in the system. user system. You can verify this, for example, if your connection to large sites fails, but small sites and little-known web pages load without any problems.

Another way to check whether viruses are involved in Internet problems is based on Windows Safe Mode. You just need to hold down the “ F8” just before the operating system starts (before the Windows logo appears) and select the option “ Safe mode with loading network drivers " In this case, there is a high probability that the operating system, having loaded its modules according to the minimum template, will ignore the launch of the blocker virus, which you can verify by working a little on the Internet.

To combat such viruses, use any updated antivirus system, which is recommended to be launched from an external boot disk. The fact is that some viruses can camouflage themselves and block the actions of antiviruses if they are running on the same operating system. Therefore, to successfully treat your system, it is advisable to connect to it from any other operating system that is known to be free of viruses. If you do not have the ability or proper qualifications to run an antivirus from external system, use at least the same safe Windows mode. In this case, it will be enough to select the option “ Safe mode”, after which you can run installed antivirus For full check systems.

More details about independent search I wrote about viruses on the computer in the article.

And don’t worry about the fact that if you still haven’t managed to restore your Internet connection, perhaps this is a wonderful reason to go out and visit friends in real life. Let's watch a humorous positive video on this topic.