How to fix an iPhone 7 Plus iOS update error "Unable to Check for Update," cannot update to iOS 11 [Troubleshooting Guide]

Given the promising new features and advanced services including device optimization offered by the latest iOS, many people would want it. The new update to iOS both major and minor versions of iOS 11 can be downloaded over-the-air or wirelessly through the iPhone menu and using the iTunes software. But not all of those who attempted to get the new iOS found success as some ended up falling into various issues and errors.

Among the troubles encountered by some users of iPhone 7 Plus when trying to download the iOS 11 software is on the error prompt saying “Unable to check for update” while others are prompted with a relevant error saying, “Unable to verify update.” These errors usually appear when trying to get the latest iOS update wireless or over the air. Users who are prompted with these errors are left with only two options, either to Cancel action or Try Again. What causes these errors to occur when trying to get the latest iOS 11 update installed on the iPhone 7 Plus and what should be done in order to get rid of them and proceed with the update download and installation? Read on to find out the answers to these questions.

But before anything else, if you have other concerns with your iPhone 7 Plus, make sure you drop by our troubleshooting page for we have already addressed some of the most commonly reported issues with this new iPhone. If you need further assistance or if you can’t find what you’re looking for in that page, fill up our iPhone issues questionnaire and hit submit. Don’t worry, it’s a free consultation service so you don’t have to worry about anything. Just give us more information about the problem and we’ll do our best to help you fix it.

Possible causes of these iOS update errors on your iPhone 7 Plus

Based on the error message itself, it is saying that something is preventing your device from getting the iOS update. It also denotes that the communication between your device and the update server is interrupted or blocked. So your next approach is to determine what is causing the update verification to fail. One possibility is that your device is no longer connected to the wireless network thus no connectivity. Should this be the case on your end, you need to fix the problem with your network first so you can proceed with over-the-air download of iOS 11 update on your device. Another factor that can trigger the same error to occur is that the Apple server itself may not be available at the moment, thus it is telling you to try again later.

Basically, it’s more on the software aspect rather than a hardware issue so it can be resolved by the end-user.

Recommended solutions to deal with iOS update errors

The methods introduced below are considered generic solutions to deal with update errors and relevant problems on the iPhone 7 Plus. These methods are based only on the possible causes.

Before moving any further, check the Apple System status by navigating to the Apple System Status page and then verify if all services are available. You will know if services are okay if a green dot shows next to each of them. Otherwise, you will see a grey dot which denotes that the service is currently not available. But if you cannot navigate to the Apple website because you cannot connect to the Internet in the first place, then you should fix your connection instead. Here are a few things you can try on.

First solution: Reboot your wireless router/modem.

This is a very simple yet most effective solutions to all network-related issues ever encountered. Should the error you see is triggered by a problem with network connectivity, performing this method might be the only thing you need as remedy.

Internet service providers tech support called this method “power cycle” on the network equipment in use like modem or wireless router. This is one way to clear your modem/router software from flaws or random glitches and at the same time, allows it to establish fresh connection from the network tower.

Majority if not all minor issues with Internet connection are rectified by this method so you might as well consider giving it a shot and see what happens. Here’s how it’s done:

  1. Power off your modem/wireless router by pressing the Power button for a few seconds until the lights turned off.
  2. Remove the power cord from the outlet or power source.
  3. Wait for about 1 to 2 minutes.
  4. Plug your modem/wireless router back into the power source.
  5. Turn it back on by pressing the Power button.
  6. Wait until all the lights on the modem/router become stable.
  7. Now reboot your iPhone 7 Plus.
  8. After your iPhone boots up completely, try to check for software update again by going to Settings-> General-> Software Update.

If you’re still getting the same error message saying that your iPhone is “Unable to Check for Update iOS” tap the option to Try Again. Otherwise, try the next applicable workarounds.

Second solution: Work with your Wi-Fi

Just like any other services, the iPhone’s Wi-Fi function can also become rogue from time to time. Switching the feature off and on again might be able to fix it. This trick was able to help many people who have encountered network errors. Considering that this error is also related to the network, you may take your chances by performing this trick as well. Here’s how:

  1. Navigate to Settings.
  2. Tap Wi-Fi.
  3. Toggle the Wi-Fi switch to turn it off.
  4. Wait for at least 30 seconds.
  5. Toggle the Wi-Fi switch to turn it back on.

If that won’t work, you can also try to forget your Wi-Fi network and then set it up again. This workaround can also help fix problems related to wireless network connectivity. Here’s how to forget or delete a Wi-Fi network on your iPhone 7 Plus:

  1. Make sure you’re within range of the Wi-Fi network you want to forget.
  2. Tap Settings from the Home screen.
  3. Tap Wi-Fi.
  4. Tap the information icon (i) next to the Wi-Fi network you want to forget.
  5. Select the option to Forget This Network.
  6. If prompted, tap Forget to confirm action.
  7. The selected Wi-Fi network will then be deleted.
  8. Reboot your iPhone then go back to Settings-> Wi-Fi-> then locate and connect to your wireless network again. Enter the correct network password if necessary.

When you’re connected, try to check for software update on your iPhone again and see if it’s already working properly this time. If not, try the next method.

Third solution: Reset Network Settings on your iPhone 7 Plus.

If turning Wi-Fi off then on and forgetting the Wi-Fi network won’t help, then your next option would be to reset network settings on your iPhone. Doing so will erase your current network settings and then restore the defaults. Should there be any error on the network settings, which in some ways has triggered this error to show up, then that should be rectified by the reset. If you want to give it a shot, take note of your network password and server information, then follow these steps:

  1. Tap Settings from the Home screen.
  2. Tap General.
  3. Scroll down to Reset.
  4. Select the option to Reset Network Settings.
  5. Wait until the reset is done. Your iPhone will then reboot.

After it boots up completely, set up your wireless network again, connect to it and then try check for iOS update.

If the error persists, you can try to change your Wi-Fi DNS settings (optional) with these steps:

  1. Tap Settings.
  2. Tap Wi-Fi.
  3. Tap the blue (i) icon next to the Wi-Fi network in use.
  4. Scroll to and tap the DNS field.
  5. Enter or These are Google’s public DNS used when dealing with network-related issues.

Try to check for iOS update after changing the DNS information.

Fourth Solution: Use iTunes to get the update for your iPhone 7 Plus.

If none of the aforesaid methods is able to fix the error and you still couldn’t check for iOS update on your iPhone wirelessly, then you may opt to using iTunes instead. You will need a computer (Windows or Mac) to proceed with this method. Once you’re all set, follow these steps:

  1. Connect your iPhone 7 Plus to your computer using the supplied USB cable or Lightning connector.
  2. Open iTunes on the computer. Make sure you are using the latest version of iTunes. If not, install the latest version of iTunes on your computer then proceed to the next step.
  3. Select your iPhone 7 Plus from the list of available devices in iTunes.
  4. Click the Summary section.
  5. Click the Check for Update button.
  6. If an update is available, you will see an update notification.
  7. Click the Download and Update button if you wish to install the update. Be sure to backup your iPhone before you continue for safekeeping.
  8. If prompted, enter your passcode.

Wait for iTunes to complete the iOS update installation on your iPhone 7 Plus. It can take longer depending on the update file size so you may need to be a little patient.

Manual update through iTunes is considered the best alternative if you cannot update wirelessly on your iOS device.

Other suggestions for you to consider

Verify and make sure you are not currently enrolled to iOS 11 beta version

  • If by any chance you have downloaded the iOS 11 beta version on your iPhone 7, the iOS 11 update won’t show up in Settings. In this case you will need to delete your beta profile first by going to Settings-> General-> Profiles & Device Management-> then tap the beta version to delete profile. After doing so, try to get the latest iOS update for your iPhone 7 again.

Seek More Help

  • Contact your network service provider or Apple Support for further assistance and recommendations if the error persists and that iTunes is not among your available options to get the iOS 11 update installed on your iPhone 7 Plus.

Engage with us

If you have other issues with your Apple iPhone 7 Plus, we are always willing to help. Contact us through our iPhone issues questionnaire and provide us with all necessary information about your problem so we can find a solution to your issue.