Why doesn’t the computer sees the phone / smartphone via USB?

User smartphones at any time may need to transfer / copy data from a smartphone to a computer or in the opposite direction. Of course, for this you can use Wi-Fi wireless network, but when it comes to large amounts of data, it is more convenient to use USB connection to use. There may be a problem. the computer refuses to see the phone connected to it. What to do in such situations?

One of the frequent causes of the problem under consideration is a malfunction of an inteeus USB cable. Even if there are no signs of external physical damage, it does not mean that the cable is working. Perhaps one of the conductive wires was torn (t.E. There is a broken contact) due to frequent bends / extensions.

Do not think that the cable is working if the phone is charging when connecting to the charger. To recharge the smartphone, only 2 contacts are enough, and it should be all 4 to connect it to a computer.

The best way to check the available cable. connect the phone to the PC using a well-friendly cord. If the smartphone is successfully connected to the PC, the problem is found.

If the serviceable cable is not at hand, you can try:

  • Connect the phone to another computer. If he does not see the smartphone, it is obvious that the USB cable is faulty. If you sees. the problem should be signed on the computer.
  • Connect with a checked cable to a computer another phone with a similar USB-slot design. If PC sees it, the problem should be signed on the smartphone.

On computers running Windows, a cable malfunction or USB port phone can sometimes be identified using the device manager’s system application:

  • Turn off the phone it is computer.
  • Run the Device Manager application for which you press the “WinR” key on the keyboard, then enter the “DevmGMT opened window.MSC “, click” OK “.
  • Connect the smartphone to the computer.
  • If after 1-2 seconds after connecting in the “Device Manager” window, a new partition appears with the name “Other devices”, and it will display the “Unknown Device” element, this will be a sign of a cable malfunction or a telephone USB-jack. It looks like this:

In some cases, the computer can ignore the connection of a faulty device, T.E. In the “Unknown Device” appears in the Device Manager application. Therefore, after connecting the phone, go to the top of the program window in the “Action” menu and select “Update Equipment Configuration”.

With this development, the scenario, the phone can hardly be connected to a computer using an existing USB cord. Even if the problem is not in it, but in the USB jack of the smartphone itself, then it can be determined only when using a good cable.

What you need to do before checking the phone?

phone does not see usb

Once you have discovered the problem, you need to do several actions:

  • Go to the general settings and adjust them. You need to find the “USB Debug” item and activate it. Usually it is located in the Advanced Settings section for Developers.
  • Restart the device and try to activate the connection via USB.
  • If earlier you had no problems with the connection, and now it is lost, then the reason for installed applications or software failure. In this case, you need to roll back the settings to the factory. This procedure is performed through the settings menu or via Recovery mode.

You can get on the latter while restarting the device by pressing the power key and reduce sound (in some device models other transition methods, other key combinations can be used).

In the event that the problem is not solved with these actions, you need to find the reason why the phone does not see the USB connection. Depending on what has led to a failure, it is necessary to take action.

Android setting

I came across two situations. The first phone demanded not only getting the development of the developer and turn on USB debugging, but also the installation of the phone drivers to the computer. In the settings of the second smartphone, I did not find the parameters responsible for connecting via USB. They do not need: the phone is perfectly detected by the computer, after which it proposes to select the connection mode.

So, if you connected your smartphone, but nothing happened:

  • Open Android settings.
  • Go to the “About Phone” section (may be called “About Device”).
  • Find the assembly number (models) and click on this item until the notification appears that you will soon become a developer. Usually need to press 7-10 times.

After you become a developer, a new section will appear in the Android settings. “Developer Settings”. Inside it, you will find the “Debug on USB” switch, which you want to translate to the “On” position.

Now try connecting the phone to the computer again. When connecting, a mode selection window should appear on the smartphone screen. By default, the old Android versions costs “only charging”. If the window does not appear, put it out of the curtain notifications.

To transmit files, you need to select media mode (MTP) or drive. Among the options there will be a PTP mode, but it is only suitable for photos that can be moved with the same success in MTP.

After selecting the right mode in “Computer” on Windows, media device will appear, with the contents of which you can work. Depending on the features of phone models and versions of Android, internal memory and SD card can be displayed together or as separate drives. But it does not matter, the main thing is to be displayed at all.

In Android settings, there are no other parameters responsible for connecting via USB, except debugging. However, there are some features. For example, on Nexus smartphones, you need to unlock the screen protected by a password or graphic key so that the computer gets access to the contents of the memory.

In addition, the USB connection cannot be installed if the modem mode is turned on on Android. To check its condition and disable if necessary:

  • Open settings.
  • In the “Network and Connections” section, click “Advanced Settings” or “”.
  • Go to modem mode and disconnect the WLAN access point. If it is disabled, you don’t need to do anything else.

Some manufacturers offer users special programs for managing smartphones on a computer, but install a simple USB connection can be used without this software. The utilities from manufacturers are not needed for banal photo transfer, but to perform more complex tasks: phone updates via computer, device firmware, resetting settings.

The reason that the computer does not see Android via USB may be incorrectly installed or simply curve custom firmware. In addition, sometimes helps reset the settings, but before you do it, do not forget to make a backup of the data, as they will be removed. The problem may disappear even after the usual reboot of the smartphone. have it in mind.

Damaged USB port on computer

Less likely, but the cause of connection problems is an inoperable USB.Port on computer. Check if the connector functions, it is very simple: insert any other device into it, for example, a USB flash drive or an external hard drive.

Just try to connect the phone to another connector. Some users advise using USB ports 2.0 (USB 3.0 blue).

Problems with charging connector on the phone

Usually problems with the phone’s socket begin after falling, water, dirt or other damage. If one of the listed happened to your gadget lately, you will have to visit the service center, where experts will be able to replace the damaged port.

Battery problems device

Another hardware cause can be a battery problem. At best, you just need to pull the battery from the phone for a few seconds if it is possible. At worst. you have to replace the battery.

Connection problems with Android

Before something to reinstall, try simply to restart the computer or the smartphone itself. If the computer still does not see the phone via USB go to the next stage. Causes may be as follows.

Cable problems

When connecting the smartphone to PC, it is advisable to use the original Cable for Charging and Sync. If it is not at hand, try to find another wire that was complete with a different phone (follow the compatibility of the charging connectors!). If you could not find such. go to the nearest electronics store and buy a new. It makes no sense to spend money on the most expensive cable, but also to buy a frank debris for 50. Also come ache outside “Cables 3 in 1” with one USB and several smartphone plugs. The optimal version is a simple wire of 0.5. 1 meter in a soft plastic braid.

The wire itself should be without dons and cracks. If there are dust or dirt on cable contacts, then blow it with air or try to remove with dry soft cloth. The main thing is not to rub too much and do not try to clean the connector with something hard.

Computer problems

At all, even very old versions of operating systems, drivers for connecting Android smartphones are automatically installed. In fact, PC sees a smartphone as an ordinary flash drive.

If this for some reason did not happen, then try to connect the phone through another USB connector. It is advisable to use those that are located on the back of the system unit. there they are installed directly into the motherboard.

If the PC continues to ignore the smartphone connected via USB, it can help reinstall drivers. With the connected smartphone, right-click on the My Computer icon and click “Properties”. In the open window, run “Device Manager”. After that, a list of all PC device connected to the PC motherboard will appear. Problem to stand out with a yellow exclamation mark.

Click on the desired device (usually the name is similar to the model of your smartphone) right-click and select “Properties”. Go to the Driver tab and select “Update Driver”. Try to do it automatically and be sure to restart the computer.

It is possible that for your old device, individual drivers are needed. they were usually recorded on the disk, which comes with a smartphone. In this case, set them in the Driver tab manually by specifying the location you need files.

Smartphone can also block computer protective programs. If you are sure that there are no viruses on the phone, turn off software to protect against harmful programs and re-connect the smartphone to PC.

Problems with smartphone

Sometimes the computer does not see the phone via USB due to problems with the Android-smartphone themselves. We will try to figure out what can go wrong. Let’s start with simple.

Problems may occur due to poor contact wire and connector inside the phone. Gently blow this place with air, but do not try to clean it with something hard! Also, problems can occur due to the fact that the wrong smartphone connection to the computer is selected by default. Immediately after connecting, the smartphone will offer to select the mode in which it will work (in different phones they are called differently, but the essence remains one). “only charging / without file transfer”, “Photo Transfer” or “File Transfer”. We, of course, are interested in the last option. choose only it.

The correct operation of the PC and the smartphone can interfere with the modem mode included in the phone. Make sure that you disconnect this feature before connecting the Android smartphone to the computer. Also, the phone must be unlocked. due to this, the computer may not see the phone.

The PC is not installed or flew smartphone drivers

In most cases, smartphone drivers must be installed in the logging of devices in the data exchange mode. Usually they are installed when they are first connected and remain on the PC, so that when subsequent connections, the phone is determined quickly and automatically. But sometimes the driver flies, or it is randomly removed. You can check its availability in the system by going to the Device Manager. If the name of our smartphone is present in the “Portable Devices” tab, but in front of it there is an exclamation mark of yellow color, or there is an equipment identified as an “unknown device”, there are problems. a PC or a laptop does not see the phone via USB, perhaps from.Nost of incorrectly functioning go missing driver. You can try to update the driver manually on the same algorithm, as in the case of the USB controller drivers.

In some cases, the reason for connecting the phone to the PC / laptop it does not see it, is the effect of a virus that simply blocks the established connection. Sometimes the use of some antiviruses, which identify the connected carrier as a dangerous. However, the virus under the Android is a rare phenomenon, but the computer will not hurt a thorough check.

How to connect to a computer iOS device via USB

Make sure the mobile device is turned on and unlocked, then connect it to the computer. For the first time the iOS will ask for permission to access media files, and you will need to give it.

In the case of PC on Windows, connected iPhone or iPad will appear in the “Explore” in the section of media devices. They will be displayed as ordinary digital cameras. you can view and copy photos and videos. To access other data, you will have to use iTunes, which can be downloaded from Apple. The registration procedure will not cause difficulties, you only need to follow the prompts of the setup wizard.

On Mac everything is somewhat simpler. Macos Mojave to work with mobile devices is used iTunes, in MacOS Catalina and later versions. Finder. Both programs are already included in MacOS, so you will start automatically when you connect iPhone or iPad. Content interaction is carried out through them, and for direct access to media files, you can use the standard photo application. It also opens automatically and allows you to view and import files.

If the problem of detecting a computer of a mobile device is not solved, discard the settings

If so far, your computer does not see the phone via USB, it should help drop smartphone settings using Hard Reset. Go to the settings of your phone, select the “Backup” menu item, and select “Data Reset”.

But immediately warn! You will lose your files and settings that are in the internal memory of the phone. And the files located on the SD card will remain intact. Therefore, this item is worth using only in extreme cases!

As you can see, problems with the lack of visibility of the connected phone on the PC can be worn both software and hardware. And such problem factors there are a considerable amount.

I would advise first to pay attention to the likely mechanical damage in the cable and device. And then go to program methods.

In many cases, the usual reboot of the smartphone can help (temporary battery seizure). Or working with USB connection settings. If all of the listed does not help and the computer does not see the phone via USB but it is charged, then it is possible to contact a qualified service center.

It is also interesting:

On Android writes: not enough memory on the phone!

Why the phone began to charge very long

Why does your smartphone sees a USB flash drive

Why still does not see the phone?

The main reasons for such a phenomenon we looked at the previous sections. But there are other (more rare) causes, because of which the phone is not visible to the computer. Next, imagine their brief description:

  • Viruses. Some viruses block part of the functions of the computer, because difficulty defining the phone can be directly related to the malicious effects of viral programs. We recommend installing the antivirus and scan the system.
  • USB port software lock. Some computers have a software that does not allow you to read information from devices connected via USB. If this software is installed on PC, it will be necessary to disable it. Otherwise, view through the computer files on the phone will not.
  • Activated modem mode on the phone. Need to check the status of this mode. If it is turned on, then it must be turned off and repeat the attempt to connect the smartphone to the PC. To turn off the mode, you need to go to the “Wireless Network” section (on some phones, these partitions are called otherwise. “Connections” and “Network and Internet”), find the option of inclusion of the modem mode and deactivate it. Then the phone will continue to reconnect the PC.

If the above reasons did not help achieve the result, it will only be to invite a specialist who will definitely find out why the computer does not see the phone, and will eliminate the source of the problem.