Software Update Failed: How-To Fix iOS 15 Install Error On iPhone [2021]

Here is how to fix the iOS 15 software update failed error on iPhone and other supported devices. Apple has released iOS 15 which you can now update on any compatible iPhone model via the normal OTA method or clean install using IPSW files for a fresh start without preparation issues. If you want to get a taste of all the new features and improvements to existing ones, downloading the update from the Settings app is available worldwide. However, sometimes the update process comes up against roadblocks causing hiccups in the otherwise routine task. One of these problems pertains to a Software Update Failed issue. Thankfully, there are a number of easy fixes to complete the iOS 15 update on your device.

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How To Fix iOS 15 “Software Update Failed” Error On iPhone:

Experiencing issues while updating to the latest iOS version is an occurrence that is not uncommon. One of those familiar nuisances results from the “Software Update Failed” error as you attempt to upgrade the existing operating system to IOS 15. If you’re facing similar headaches, try the following solution to see if they work on your device.

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Try To Install 15 Again

You might have tried this method but anyway here’s how it works:

When you see the “Software Update Failed” error, close the prompt. Then, exit all opened tabs. With that done, restart your iPhone.

Now when your device is turned back on, connect it to a stable Wi-Fi network in your vicinity and wait for a few minutes without touching anything on your device.

Next, head over to Settings > General > Software Update and complete the installation. This will fix the Software Update error.

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Give It A Few Hours And Reinstall

Usually, when Apple rolls out a new major firmware, millions of users rush to install it on their iPhone and iPad devices at the same time. This puts an extra burden on the servers handling the update process which manifests in annoying interruptions. Therefore, it is normally recommended to wait for a few hours until the dedicated resources restore their capability of managing seamless update installation on your device again.

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Use PC To Install IOS 15

Using a computer offers an alternative way to receive the iOS 15 update. Simply plug in your iPhone to your PC Windows or Mac, launch iTunes on Windows or Finder on Mac, and then click on the Update button in the Summary section of the interface.

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Perform Manual iOS 15 Installation

Manual install of iOS 15 requires using the IPSW firmware files. Download the relevant installation file for your iPhone and use it to install iOS 15 This solution may appear somewhat technical to most average users, it works nonetheless. Here are links to download the IPSW files along with the step-by-step installation guide.


These are the reliable workarounds to fix the Software Update Failed error that normally pops up during the iOS 15 OTA update process. If you know of any other solution, share your views with us in the comments section.