A Guide to Fix iTunes Error 27 in 7 Ways

fix itunes error 27

Among other software/hardware issues, the iTunes error 27 stands out as one of the most common problems facing iPhone users. It appears when you try restoring or updating your iOS device. Typically, this dreaded error tends to shut down your iPhone to recovery mode. Once you attempt to update your iPhone using iTunes, then the iTunes error code 27 notification will appear on the iPhone screen, making it impossible to boot or update the device using iTunes. If you are experiencing the problem, then this article will provide you with 7 ways that you can implement to resolve the issue. Check them out.

Part 1. Check USB Cable and Port to Fix iTunes Error 27

It is the first thing you should do if you are experiencing the iTunes error code 27 notification on your iPhone. The problem may result from using a counterfeit or faulty USB cable. Look for any loose connection on your iPhone and PC to ensure optimal functionality. It is highly recommended that you make use of an original or official Apple USB cable.

check usb port and cable

Part 2. Update iTunes to Repair iPhone Error 27

Restoring your iOS device on an obsolete iTunes version can be the reason for the iPhone update error 27. It is, therefore, paramount that you check whether you are running on the latest version of iTunes. If not, you should practically consider updating your iTunes application to get rid of such trouble.

The procedure for updating iTunes will differ depending on which operating system you are using. If your PC is running on Windows OS, launch the application and click on "Help" on the main menu and click on "Check for Updates" for recent software updates.

update itunes on windows

If you using Mac with macOS Catalina 10.15 or later, this action is unnecessary, as updating or restoring an iPhone in iTunes is realized by "Finder" on a new Mac. Otherwise, open iTunes > choose "iTunes" from the top menu bar > "Check for Updates" to update iTunes on your Mac.

update itunes on mac

Part 3. Restore iPhone without SIM Card to Avoid iTunes Error Code 27

Apart from rebooting your iPhone, restoring your iPhone without a SIM card is also a common fix for presumably simple software glitches. It can also help resolve this particular error code issue. To restore the iPhone without the SIM card, quickly follow the following steps.

restore iphone in itunes without sim card

Step 1: Switch off the iPhone and bend a paper clip straight to remove the SIM card;

Step 2: Next, turn on your iPhone and use an original USB to connect it to iTunes;

Step 3: Go to "Summary". On the right panel, click "Restore iPhone" to try restoring your iPhone again. Check if such an iPhone error code still occurs.

Part 4. Disable Antivirus Software on Computer to Correct iTunes Error 27

Third-party software such as anti-virus software can deter iTunes' connection to its servers, leading to the popping of iTunes error code 27 notification on your iPhone screen. Disabling the application could go in a long way in ensuring effective connectivity to the iTunes servers. To disable your antivirus, simply right-click on on the antivirus icon and choose "disable" or "exit" depending on the software option on your PC. It is highly possible that this solution will resolve your predicament. In case it does, you are suggested to upgrade or change the antivirus software option.

Part 5. Use Another Computer to Solve iPhone Unknown Error 27

In the event that the iPhone error 27 lingers, you might as well use a new computer or borrow one from friends to try updating or restoring your iPhone. Chancea are that you are running the iTunes application on an old OS. Equally, the PC could also have been infected by malicious software. Malicious software such as worms, virus, and Trojans can stop the normal functioning of your PC and iTunes, hence bringing up the problem.

try another computer

Part 6. Restore iPhone under DFU Mode to Rectify iTunes Error 27

iPhone error code 27 problem is yet to be resolved until now? Then, it may be an iOS glitch, which could be corrected by restoring your iPhone under Device Firmware Update (DFU) mode. The method is effective; however, you will end up losing all your data including photos, favorite music albums, and videos. Below is a detailed procedure to restore iPhone in DFU mode using iTunes. If you don't care data loss or you have had a backup, do as follows.

For iPhone 8 and newer:

iphone 8 or newer dfu mode

i: Connect the iPhone to the PC using a legit USB;

ii: Quickly press and release the "Volume Up" button then do the same to the "Volume Down" button quickly;

iii: Hold the "Side" button until the screen goes dark. Now, hold down both "Side" and "Volume Down" buttons for about 5 seconds;

iv: Keep holding the "Volume Down" button while releasing the "Side" button. Nothing displaying on the screen means that the iPhone has been into DFU mode.

For iPhone 7/7 Plus:

iphone 7 series dfu mode

i: Connect the iPhone to the PC using a genuine Apple USB cable;

ii: Simultaneously press and hold the "Side" button and the "Volume Down" button;

iii: After 8-10 seconds, release the "Side" button and keep holding the "Volume Down" button. If nothing appears on the screen, the iPhone is in DFU mode.

For iPhone 6S and older:

iphone 6 dfu mode

i: Connect your iPhone to the PC;

ii: Press and hold the "Home" button and the "Lock" button for about 10 seconds;

iii: Release the "Lock" button while holding the "Home" button simultaneously;

iv: If no iTunes logo shows on the screen, the iPhone gets into DFU mode.

Note: However, instead of using the DFU mode solution, you might consider going for a much safer option, one that does not involve data loss.

Part 7. Use Joyoshare UltFix to Tackle iTunes Error 27 with No Loss

Joyoshare UltFix is an all-time iOS repairing software that lets you quickly fix various iOS glitches without data loss. Besides giving lossless solution to almost all iPhone/iTunes errors, among other problems you can resolve using the software include iPhone boot loop, iPhone frozen, black screen, and more.

This iOS system recovery tool comes in two different modes, i.e., Standard Mode and Advanced Mode, all to suit your needs. It is, however, recommendable that you use the standard mode to ensure data safety. Also, Joyoshare UltFix has a free trial version that lets you try out functionality before actual purchase. So, how does it work to resolve the iPhone unknown error 27 issue? Here is a step-by-step guide.

Key Features of Joyoshare UltFix iOS System Recovery
  • Address iPhone error 27 with no data damage
  • Feature with 2 repair modes for different needs
  • A free solution to get iDevice into/out of recovery mode
  • Support all iOS devices (iOS 14 included) and Apple TVs

Step 1: Launch Joyoshare UltFix on your computer. Connect the iPhone to the computer using a genuine Apple. When the program detects your iPhone, tap on "Enter Recovery Mode" to set the iPhone into recovery mode. Next, proceed to the "start" option.

joyoshare ultfix ios system recovery

Step 2: On the new window, select a repair mode. You are suggested to the "Standard Mode", which ensures iOS repair without data loss. "Advanced Mode" can be used to unlock a locked or disable iDevice without passcode.

choose standard mode to fix itunes error 27

Step 3: After that, click "Next" to get ready to download. Check to confirm that all info detected by the software is correct and the firmware conforms to your device model. Soon, press on "Download" to download and verify the compatible firmware package.

download and verify the firmware package

Step 4: Once the firmware package is verified, go to "Repair" to unzip it and initiate the repair process of iTunes error code 27. Ensure that the device is connected during the entire process. The repair will only take a few minutes. When completed, check whether the iPhone boots normally. If not, you can now use the advanced mode. Remember to back up your iPhone data before performing.

fix itunes error 27 without data loss

Final Word:

We can all agree that the iTunes error 27 problem can be pretty annoying and inconveniencing. The above guidelines will help you resolve the issue without much struggle. In this case, Joyoshare provides you with an effortless, effective, and lossless alternative. All that is needed of you is to follow the procedure above. In the event that the problem still persists, then it is highly probable that the issue is a hardware problem. In the face of this, you should consider seeking guidance from a professional iPhone repairer. You can also visit the nearest Apple service store. They are also ready to help.

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