Unable to Install iOS 15 Update? 7 Best Fixes For Your iOS Device

 iOS 15.4 is a significant update that adds new features to make your iPad and iPhone experience more enjoyable and faster. Apple expands FaceTime, strengthens security, and improves its Weather and Maps apps.

Only when you assumed there was nothing more Apple could really do to enhance its features, the massive changes it made in iOS 14, iOS 15 arrives with a slew of new features and enhancements. FaceTime changes take center stage, but upgrades to accessibility, privacy, online surfing, translation, intelligent appliances, Maps, and Weather are all in the works. 

However, while upgrading to the latest iOS 15 version, some users received an error message indicating “an error occurred installing iOS 15.4”.  Resolving the ‘unable to install iOS 15 error’ is not difficult. You just need to check a few things and perform a few steps to enjoy the fantastic iOS 15 features.

Here are the seven easy fixes to resolve the common ‘unable to install iOS 15’ to enjoy all the premium features. 

Requirements To Ensure iOS Update Downloads And Installs

First of all, if you are getting the ‘unable to install iOS 15’ error message, are you sure your device is compatible with iOS 15? Or did you check all the requirements necessary to update your iPhone to the iOS 15 version? 

Here are some general requirements to ensure the iOS 15 update downloads and installs easily on your iPhone or iPad. 

Make Sure Your Phone is Compatible with the Latest iOS Update

If your iPhone is not compatible with the iOS 15 update, you can’t download it. Only the iPhone 6s and later generations are compatible with iOS 15, and you can download the latest update only on these iPhones. Any iPhone model earlier than the iPhone 6s is not compatible with iOS 15 and can update to leading iOS 12 software. So, make sure you have the right iPhone to enjoy the iOS 15 updates. 

Read More: How To Downgrade From iOS 16 To iOS 15?

Make Sure You’re Connected to a Stable Wi-Fi

The second most crucial thing iOS 15 installation demands is a stable Wi-Fi connection. Ensure your Wi-Fi is working correctly, and VPN mode is off on both your iPhone and routerEnsurere you are not using public Wi-Fi for iOS 15 updating because public Wi-Fi is not that strong, and your updating can get stuck in between. 

Make Sure You Have Sufficient Free Space

The iOS 15 update of Apple is of massive 5.5GB. Make sure you have a lot of storage on your iPhone to install iOS 15 efficiently. 

Make Sure You Have Over 50% Battery

Low charging can delay or overall stop the process of iOS 15 installation. So, that’s another requirement iOS 15 demands. Your device must have a battery of over 50% to get started with the iOS 15 installation. 

Try Again After Some Time

After trying all steps, if your device is still not updating to iOS 15, then leave it for some time. Try again after a few hours the next day. 

But if you are still getting ‘unable to install iOS 15’ after waiting some time, we have some other tips. Follow the below-mentioned steps and methods to get that iOS 15 installed and set up on your iPhone or iPad. 

1. Restart your iPhone to fix the unable to install iOS 15 error

The first and foremost strategy to troubleshoot any iPhone-related errors is to restart your device. Heavy updates like iOS 15 can cause a glitch in your device system, and your device might need restarting to freshen up and allows the iOS 15 to install. Here is how you can restart your iPhone to resolve the unable to install iOS 15 error. 

Step 1: Press the volume up key and release it. 

Step 2: Press the volume down key and release it. 

Step 3: Then, press and hold the power button of your iPhone until the Apple logo appears on your screen. 

That’s it; your iPhone will restart and refresh. Now try installing the iOS 15 update and enjoy the experience. 

2. Force quit the Setting ap to fix the unable to install iOS 15 error

Just like restarting your iPhone can help with iOS 15 installation, the ‘Setting’ app force quitting and then opening it again for downloading can also help. Here is how you can force quit the Setting app to resolve the can’t update iOS 15 error:

Read More: Why Does Siri Sound Weird On iOS 15 After Update? 10 Quick Fixes

Step 1: Press the home button of your iPhone twice simultaneously. If you have an iPhone with a Face ID, swipe up from the bottom of your home screen and hold it there. 

Step 2: Now, you will see all apps as cards you were using before. Get the ‘Settings’ app care and drag it all the way up on your screen for force quit. 

Step 3: Now, after some time, open the ‘Settings’ app again. 

Step 4: Tap ‘General’ and then ‘Software’ and tap on ‘Update’ to get the iOS 15 installation. 

3. Update your device with iTunes to fix the unable to install iOS 15 error 

Updating your iPhone or iPad with iTunes on your computer is another easy way to resolve this problem. And this is the most efficient way with guaranteed results. Here is how you can update your device using iTunes to fix the unable to install the iOS 15 error:

Step 1: Open iTunes on your laptop and connect your iPhone to it. 

Step 2: On your laptop, click on your iPhone icon. 

Step 3: Navigate to the General/Summary.

Step 4: Click for the ‘check for update.’

Step 5: On the pop-up window, you will be asked to install the new iPhone software version 15. 

Step 6: Here, click on Download and then Update.

Step 7: Wait for the download to finish updating to iOS 15.4.

4. Reinstall The Update To Fix The Unable To Install iOS 15

The most basic method for immediately resolving the “unable to install iOS 15.4” issue is reinstalling the update. To do so, simply tap on Retry when you encounter a difficulty, as shown in the image above.

Select Remind Me Later and return to Settings > General > Software Update if the problem persists. Simply double-click it to reinstall it. You might be able to get the newest edition after re-downloading it this way.

5. Disable Low Power Mode 

Sometimes restarting your device alone might not resolve the unable to install the iOS 15 error. In this case, you should disable the low power mode on your iPhone and restart your device again. Here is how you can disable the low power mode:

  • Go to Settings > Battery and tap on ‘Low Power mode to turn it on and off.’

You can also disable the low power mode in another way:

  • Tap on ‘Control Center’. 
  • Then tap on ‘Customize Control.’ 
  • Here, select the option of ‘Low Power mode’ to add it to the control center and tap on it to turn it on and off. 

6. Resolve ‘Frozen iPhone Screen’ Error To Download iOS 15 

Sometimes iPhone screen gets stuck on the same update requested screen and does not allow the users to take further actions actually to install the iOS 15 update. So, if your iOS 15 update is also stuck on the same screen, here is how you can resolve this:

Step 1: Go to the Settings app of your iPhone. 

Step 2: Tap on the General option. 

Step 3: Tap Reset and then tap on ‘Reset all settings’ to reset your iPhone. 

That’s it; after your, iPhone will restart, update it again. It won’t be stuck on the same update requested screen, and you can install the iOS 15 easily.

Wrapping Up

So, there you have it. These are the solutions you can try to resolve the unable to install iOS 15 error on your iPhone. Primarily the error arises due to device incompatibility, storage issues, and network connection. But if you have all set up but still can’t download the iOS 15, then all the solutions above will guide you thoroughly to resolve this error. Do let us know if there is another way we can use to fix the unable to install iOS 15 update error? We will be glad to hear back from you. 

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