Failed to establish connection with the server. Problem connecting USB cables on iPhone
iTunes is a unique service that allows you to combine purchases and installations made on all devices linked to your Apple account ID. With this application you can synchronize phones and tablets, create backups data and much more. If iTunes stops working for one of the following reasons, it will become big problem For Apple user and will cause a large number of inconvenience.
Can't connect to the iTunes Store - why and what to do
When you try to connect to the iTunes servers, you may receive a notification that says something similar to “Unable to connect to iTunes,” “Connection and authorization error,” etc. This will interrupt the authorization process and may cause iTunes to stop working. reply.
The reasons for this behavior of the program may be the following:
- Unstable or broken connection with mobile internet or Wi-Fi network.
- Outdated or not current version iTunes applications.
- Damaged application files.
- Poorly functioning USB adapter.
- Incorrect date and time settings on the device.
- Outdated or outdated version IOS.
- iTunes servers are down.
How to get rid of the problem
The following will list methods that will allow you to cope with all of the above. possible reasons. If you do not know why exactly the error appeared in your case, then use all the instructions one by one until the problem disappears.
Reboot your computer, application, and device
Close and relaunch iTunes, then restart your computer and your phone or tablet. This action will restart all processes occurring in background, and perhaps it will fix the error.
Reboot the computer
Problem with servers
It is possible, although very unlikely, iTunes server V this moment don't work because technical reasons or spam attacks. You can check this: go to a special tab on the official Apple website (https://www.apple.com/ru/support/systemstatus/), which provides information about the operation of all services. Find iTunes, if there is a green circle next to it, then this means that its servers are working, and the problem arose due to something else.
Checking if the iTunes server is running
Replacing the USB cable
Check if the USB cable has any external damage: fractures, cuts, kinks. Also, the adapter may not work correctly if it is unofficial. If you have the opportunity, try connecting to another computer with the same cable to make sure that the problem is there.
Checking and changing the USB cable
Checking your Internet connection
Try loading a link in your browser or downloading any file from the Internet to make sure the connection is stable. Reboot your router if you are using Wi-Fi, and reconnect to the Internet from the device itself and your computer.
Reconnecting to the Internet
iTunes Update
Reinstalling iTunes
The program files may be damaged, and updating will not help in this case. If you have not accessed the program files yourself, this means that they were damaged by a virus.
Changing time and date settings
The problem may be that the date and time settings on your phone or tablet are incorrect, since synchronization checks the authenticity of the application certificate, and if the dates do not match, access to the program will be denied.
« "iTunes was unable to connect to iPhone because it received an invalid response from the device" or “iTunes could not connect to the iPhone because an invalid response was received from the device”, suddenly this message appears when synchronizing with iTunes, and why did such an error happen?
In fact, at iPhone connection or iPad to computer The certificate exchange procedure takes place. The user then sees a dialog box on the computer and mobile device with the option to "install" trusting relationship» between devices. If you answer negatively at least on the device, this will lead to the inability to connect and similar errors. But what to do in this situation and we will tell you how to fix this problem?
Simple ways to fix the error
1. Check your iPhone shunt
5. Uninstall iTunes and reinstall it
These methods can simply solve minor errors in the system, if they do not help, then you should try the following methods.
For Windows/Mac operating system
For Mac OS X users
1. Disconnect all iOS devices from your computer and close iTunes. Open Finder, select Go -> Go to Folder. Enter in the field next command and press Enter: /var/db/lockdown
2. Open the View menu and select to display folder files as icons. IN Finder window You will see one or more files with long alphanumeric file names.
3. Go to Finder via Edit -> Select All. Then select File -> Move to Trash. When prompted, enter your administrator password. Restart your computer.
For Windows XP users
1. Close iTunes and disconnect your iPhone, iPad or iPod Touch. Go to “Start” - “My Computer”.
2. In the window that opens, click on the “Tools” – “Folder Options” – “View” button.
For Windows Vista or Windows 7 users
1. Close iTunes and disconnect your iPhone, iPad or iPod Touch. Next, go to “Start” – “Computer”.
2. In the window that opens, in top menu Click on the “Arrange” button. Next, select “Folder and Search Options” – “View”.
3. B additional parameters, at the very end of the list, look for the “Hidden files and folders” option and switch to “Show hidden files and folders." Save your changes.
4. Then on local disk We are looking for the ProgramData folder, and in it the Apple folder. And finally we find what we need - Lockdown folder. Let's delete it. Restart your computer.
Fix the problem with Tenorshare ReiBoot in one click
If you have tried all the methods above, but the problem is not resolved, you can only resort to the last option. The problem is probably not in the PC, but in the iPhone. And this means you need to solve this error with help.
First download and install Tenorshare ReiBoot on your computer. Then run it. Connect your iPhone/iPad/iPod touch to your computer using a USB cable. And then Tenorshare ReiBoot will recognize your device, click “Enter Recovery Mode”, then your device is already out of DFU mode.
After that, click “Exit Recovery Mode”, wait a little and the device will reboot safely. Do not disconnect the device during this process.
One click this program can solve the stuck, also if the iphone is stuck in recovery mode ( recovery mode), V iTunes mode, in update mode, in mode shutdown, in mode headphones, Tenorshare ReiBoot always allows the device to recover from a freeze.
Hello everyone, today we’ll look at what to do if we couldn’t establish a connection with the iPhone software update server?
One of the most pleasant features of modern mobile OSes is over-the-air updates. The times when you had to manually download the firmware, install it using special cable and then further sharpen it to suit your device, passed.
However, depend on remote server– also a pleasure with pitfalls. After each update is released, Apple servers withstand an influx of people wanting to update faster. What if I can’t establish a connection with the iPhone software update server?
First of all, check whether there is a connection to the Internet at all. To do this, launch the browser client social network or other "network" program. If there is no connection, then the problem may be with your connection. Delete the connection in the Wi-Fi section and create it again. If this does not help, go to the router settings and switch the broadcast to the “b+g” hybrid mode.
If you're updating via your computer using iTunes, make sure you're using the latest version of the program.
Not the freshest? Update yourself. And activate it for the future automatic check updates.
It is possible that malware has made changes to hosts file. Let us remind you that it is located in the folder C:\WINDOWS\SYSTEM32\DRIVERS\ETC. Open this file with Notepad. If it contains lines mentioning apple.com, remove them.
It happens that everything is solved by simply restarting the computer or iPhone. This method should not be neglected (although, of course, rebooting is not a panacea).
Finally, errors also occur on the Apple server itself, especially during the busiest hours after the latest updates are released. Then all that remains is to try a little later.
Whether you use your iOS, Mac or Windows device to connect to one of the stores digital content Apple, you may be experiencing "Unable to connect to" errors. iTunes Store" or "Cannot connect to App Store" This can happen at any time, even the most inconvenient moment, when you try to use the App Store, iBooks store, and even iTunes.
Can't connect to iTunes or App Store on iOS: what to do
If you are having trouble connecting to the App Store, or any of Apple's other online digital content stores through any of your iOS devices, be it an iPhone, iPod or iPad. There could be many reasons why this happens. Sometimes this can be a problem with wireless network, Internet cable is disconnected, or it is because the drivers are not updated. You can follow the following steps to help resolve these issues.
Check date and time settings
If the date and time on the device are turned off, Apple's digital content stores obviously won't like it. To check your date and time settings, you need to do the following:
Make sure you have the latest version of iOS installed on your system
Another thing you can check is to make sure that your iOS version updated. To do this, check for updates; this can be done by following the instructions below.
Make sure you have a good data connection
If you are using Wi-Fi, make sure you are connected to the correct one Wi-Fi networks by going to “Settings” and opening the “Wi-Fi” item, and whether your signal is strong enough.
Checking Wi-Fi settings connections If you use cellular communication, check if you have data cellular network, configured in Settings > Cellular, and make sure your signal is strong enough for a decent network connection. You should use LTE if possible as it usually has better speed data transmission.
Enable the use of Cellular Disabling active VPNs
If you are using a VPN that can block Apple digital content storage, then you should immediately disable the VPN from Settings > VPN to see if you can connect or not. If everything works after disabling your VPN, then the VPN was your problem all along.
Turn off VPN Do other devices on the same network have the same problem?
You can check if the problem is just with your device or if it's a problem with Apple servers by checking another iOS device or another Mac or PC to see if those computers are also having connectivity issues. If the problem occurs on all devices, then it is likely that Apple's servers are experiencing an outage and you should try again later.
Make sure there are no problems with your router.
You should never rule out what's wrong with your wireless router may have problems. If you are seeing endless error messages, you can also try resetting your router and thus resetting your internet connection and this may solve the problem.
Can't connect to iTunes or App Store on Mac
As on iOS devices, at using Mac The App Store, iBooks Store, or iTunes Store may experience similar connection issues. Here are a few steps you can take to fix connection problems on your Mac.
Make sure your software is up to date
Apple's OS X operating system uses two key applications to connect to the web, namely, online digital content stores - Safari and iTunes. If you are using outdated version these software products, Apple may block their connection to digital content storage sites from a security perspective.
You can make sure both are up to date by running Mac App Store and open the Updates tab, then install updates if necessary.
Go to the “Updates” tab Make sure your firewall isn't blocking Apple's digital content stores
Mac users have access to firewall settings, but only for incoming connections. Third party software A firewall such as LittleSnitch will allow you to block outgoing connections. Make sure your incoming and outgoing connections allow you to use the Mac App Store, iBooks, and iTunes.
To check the OS X Firewall's incoming connections, you can launch the System preferences application from the menu in the Menu Bar, then click the Security & Privacy panel and open the Firewall tab. Here you can unlock the firewall settings and click the "Firewall Options" button to configure the allowed and disabled settings.
Unlocking firewall settings Make sure VPNs aren't blocking access
As with iOS, you can check to see if your Mac is connected to a VPN, which may be restricting access. Generally, VPN software is accessed from the menu bar when it is in use.
Checking if the Mac is connected to the VPN Resetting your router or modem
Because the Mac computers can use wireless or wired connection Internet connection, you can try resetting your wireless or wired router, this may fix the problem.
Sometimes problems with your router may be the cause of iTunes Store and App Store connection errors.
Check Apple Server Status
To find out if the problem is with Apple's servers and not the Mac, visit the System Status web page and it will alert you to any outages Apple systems. If all the items are marked green, then the problem is most likely related to your computer and not to the servers.
Can't connect to iTunes or App Store on Windows
If you are having trouble connecting to the iTunes Store on your Windows PC, you can follow some of the following steps and hopefully this will resolve your issue:
Make sure iTunes is up to date
Since Apple is quite strict about timely update software, the problem may be related to unsupported version iTunes. Make sure you have the latest version of iTunes installed on your computer.
Check your network settings
Your network connection may be the reason you are unable to connect. Try to make sure you are connected to the right network Wi-Fi, or check if your router is working. You can reset your router if necessary.
Make sure your proxy or VPN isn't causing problems for you
As mentioned in the iOS and Mac troubleshooting steps above, VPN servers and proxy servers can cause problems connecting to certain servers. Try disabling them and try connecting to the iTunes Store again.
Check your antivirus software
Some antivirus software may flag iTunes as a third-party unsafe program, and may block its Internet access privileges. Since antivirus software is common on Windows, this is a great place to check.
Check Apple Server Status
Just like Mac users, Windows users can visit the Apple Server Status web page to see if any of its services are going down when they try to connect.
iTunes and App Store connection errors can occur at the most awkward moment when you are trying to download new game or update the application, it always causes pain and agony. Fortunately, this problem is completely solvable; there are many ways to find the cause of its occurrence and effectively eliminate it.
In order for your brand new iPhone to always work correctly, you must regularly update the firmware. operating system— iOS. New firmware versions eliminate all the shortcomings and problems of the previous ones, identified during operation - based on user reviews and comments. They also make the operation of devices more stable, faster and clearer. At the same time, the possibilities of how system applications, and the full potential of the hardware in the iPhone is revealed. Let's figure out how to update your iPhone correctly so that no unexpected error occurs.
Before the procedure
If you are the owner of a version of the “six” with a memory capacity of 16 gigabytes, make sure in advance that you have sufficient free memory. Keep in mind that even if there is enough space to download the archived folder with updates, when unpacking it and installing it on the device, you will need a little more. Therefore, try to always leave a small reserve in excess of the specified volume of the update package. If this is not done, an error may occur at any time. The download may be interrupted, the iPhone may freeze or get stuck in a recovery loop, and at best you will need to do everything all over again, at worst you will have to forcefully restore the gadget, with complete loss of data.
Therefore, remember three main points that you must do before updating iOS: make sure you have enough free space, upgrade to latest version iTunes, and be sure to make backups to your computer or iCloud.
This will minimize the risk of a failed update. And in the event of a system failure, you can restore all your data with virtually no loss.
To be sure to eliminate the possibility of errors, it would not hurt to first update your computer’s operating system, built-in security programs, and installed antivirus. After that, restart your PC to apply all updates and you can start downloading new firmware on iPhone.
Update
There are two main ways to download and install updates. The first - from the iPhone itself, provided there is a stable connection to the network via Wi-Fi, the second - using authorized computer, in the menu of the proprietary program - iTunes.
The main differences between them are speed and convenience.
The first option is convenient because you don’t need anything other than a smartphone and the Internet. The device will perform the entire procedure itself (if you choose this method, be sure to charge your iPhone - it is unknown how long the download and installation will take). Download iOS takes longer, because purely physically - the router distributing Wi-Fi makes the data transfer speed slow.
The second one is much faster, but you can’t do it without a PC and a cable connection.
In order to update from the device itself, go from the settings menu to - General, and in them select the item - Software update.
After searching online for the latest iOS updates- an offer to download and install them will be displayed - to do this, click on the corresponding message below. 
Then confirm your agreement to the proposed terms of use. After this, you don’t need to do anything else, the iPhone will do everything itself. Just wait for the process to complete. It is best to carry out this procedure in the evening, then the Internet speed is higher and there are fewer people willing to download updates. And by morning the smartphone will be ready for use.
As soon as a new update appears, iTunes will definitely notify you about it when you connect. 
If you initiate this process yourself, connect the phone to the PC with a cable (preferably an original one), launch iTunes. In its menu, find your iPhone among devices. In the synchronization and parameters settings tab, initiate the update. 
All, further processes will proceed automatically. The main thing is that the connection to the network is stable. After downloading the iOS update package, the installation will begin, during which your iPhone may restart several times - this is normal.
But it happens that on your part all the conditions are met, but you cannot update iOS. The error is persistently displayed, and there is no way to use the device.
Types and causes of errors
It happens that, after starting the firmware update process, the screen displays system message like: “Failed to contact the iPhone software update server.” First of all, check the device’s connection to the Internet and rule out network problems. An error may also be displayed if the cable is faulty or unsuitable (always use proprietary firmware). Also try to rule out router problems by connecting your computer directly to the network.
In addition, it is quite possible that at this very moment on the servers iOS activation Apple has temporary problems. Repeat everything a little later. If you still cannot connect to the iPhone software update server, try connecting to another PC, with a network from a different operator.
Sometimes an error occurs due to restrictions that are imposed installed antivirus or a computer firewall, or a mismatch between their update versions. Therefore, install all the latest databases (including those for the computer’s operating system), restart the PC and repeat installing the phone firmware.
In some cases software error is decided by the so-called "hard" reboot. It will help if the smartphone has stopped responding to any user actions. To start it, simultaneously press and hold the Home and Power buttons for ten seconds. The gadget screen should go dark. After releasing the buttons, wait until the logo lights up in the center of the display. After that, press and immediately release Power again - the iPhone should boot up normally.
When the phone suddenly goes out and there is no response to pressing the buttons, make sure that the device’s battery is not low. Put it on charge just in case, and wait 10-15 minutes for it to gain enough power to start all the systems. After that turn it on in the usual way, and repeat the update procedure.
If the above methods did not help, then most likely you will have to restore the device when iTunes help or iCloud (we hope that after listening to our advice, you have created copies of all important data). The procedure is similar to the update process, only when prompted, you need to select - Restore. When restoring, the iPhone should automatically install the latest firmware version.