When updating iOS 11.3/11.2/11.1/11, but with message noticing: "Unable to Upgrade. An error occurred installing iOS 11.3/11.2/11.1/11", or "Software Update Failed. An error occurred installing iOS 11.3/11.2/11.1/11"? Check this tutorial fix it quickly.
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The newest iOS 11 has came to our lives, since 19th September. At this time of iOS big improvement and updating, iOS 11 has also brought so many amazing and interesting new features: type to Siri, Siri translation, customization of Control Center, map flyover mode, etc.
With so many astounding new things, you must be eager to download it over the air, or via iTunes. But according to many users’ feedback, when they updating iOS 11, as well as the latest iOS 11.3, there came an iOS 11 updating bug, an message noticing them "Unable to Upgrade. An error occurred installing iOS 11.3/11.2/11.1/11", or "Software Update Failed. An error occurred installing iOS 11.3/11.2/11.1/11".
So far we have not found the reasons leading to an error occurred installing iOS 11.3/11.2/11.1/11, and Apple also has not explain anything. But luckily we still have some practical solutions to fix it. And we have collected them in the following content. Keep reading.
An Error Occurred Installing iOS 11.3/11.2/11.1/11
Tip 1. Check If Device Supports iOS 11
Firstly, you need make sure your iPhone iPad iPod is compatible with iOS 11, or not. For example, iPhone 5 is not supporting iOS 11 anymore, according to Apple saying. To check your device being on the list or not, you can click here.
Tip 2. Turn of Settings app and Wait for a While
If you have tried Retry option many times, but this an error occurred installing iOS 11.3/11.2/11.1/11 bug is still there, why not close the Settings app and try again later? To remove the Settings App in background: Double tap Home button > Swipe up on the Settings app until it slides out of view. Several minutes later, try to install the update again: Settings > General >Software Update.
Tip 3. Reset Networking Settings
Occasionally network connection could be the reason why an error occurred installing iOS 11.3/11.2/11.1/11. So you can fix it by resetting device network settings: Go to Settings > General > Reset > Reset Network Settings.
Tip 4. Disable Wi-Fi, and Turn on Cellular Data
This way is similar to method 3, to check network connection. Firstly turn off Wi-Fi, and the switch to cellular data, for like 30 seconds, or 1 minute.
Tip 5. Force Restart Device
If resetting network does not work, you can try force restarting your iPhone iPad iPod touch. Press and hold both the power button and the Home buttons simultaneously, until the Apple logo appears.
Tip 6. Update iDevice to Newest iOS Version with iTunes
Since unable to upgrade and software update failed occur mostly when iOS 11.3/11.2/11.1/11 updating over the air, so you can upgrading your device with iTunes on computer instead.
Connect your device to your computer > Run iTunes > Select your device > Choose Summary > Check for Update > Click Download and Update, enter your passcode if asked.
Fix An Error Occurred Installing iOS 11.3/11.2/11.1/11 via iTunes
If you received the “No Update Found” message when updating with iTunes, there is because of the unpacked iOS update, downloaded before. Go to Settings > General > Storage & iCloud Usage > Tap on Manage Storage > Scroll down to check if you have the iOS 11 update list > Delete it if you have.
With these five methods above, you can definitely get rid of unable to upgrade to iOS 11.3/11.2/11.1/11, or software update failed. And also an error occurred installing iOS 11.3/11.2/11.1/11 would be gone, too. If you find these ways working perfectly, please do not forget to share it to help more people. Thanks.