How to Fix Unable to Install Update Error on iPhone

Resolve installation error to keep your device up-to-date.

Apple releases new iPhone updates, including the latest features, security update features, fixes bugs, etc. Whenever a new update is available, many users come across the unable to install update iPhone. If you have also come across it, do not worry. Because in this article, we will discuss the causes and the solutions to fix this problem. So, keep reading to gain more insights on this topic!

How to Fix Unable to Install Update Error on iPhone

How to Fix Unable to Install Update Error on iPhone

To keep your device malware-free and make it work smoothly, you are advised to keep your device up-to-date. It’s always best to check for the latest software update directly on your iPhone or through Apple’s official website. If you’re encountering difficulties while trying to update your device software to iOS 15 0r 16, then this article will help you fix this error.

Quick Answer

Follow the below steps to fix this installation error on iPhone:

1. Go to Settings on your iPhone.

2. Choose Battery.

3. Turn off the toggle for the Low Power Mode option.

Before discussing the solutions to fix the not being able to install the update on your iPhone, let’s first talk about the causes of why can’t I update my iPhone to iOS 16. To learn more about this, read the causes mentioned below:

  • A software glitch or network inconsistency can cause this issue.
  • Insufficient iPhone storage thereby not letting you install the new update.
  • Enabled Low Power Mode can also create issues while installing the new update.
  • If Airplane Mode is turned on, then also you can come across the problem.

We have discussed various methods so that you can resolve the issue. Read the methods given below carefully to fix the problem:

Method 1: Basic Troubleshooting Methods

Let’s see some of the easy-to-perform methods to fix the unable to install update iPhone issue. 

1A. Restart iPhone

You can fix unable to install update iPhone issue by opting for this method. When you restart your device, temporary problems and bugs get fixed on your device. So, you can try out this method to resolve this problem. You can read our guide on How to Restart iPhone X to learn how to restart iPhone.

slide to power off button

1B. Force Restart iPhone

Try to force restart your iPhone to fix the issue. To learn how to do this, you can read our guide on How to Force Restart iPhone X. If the issue persists after your force restart the iPhone, you can jump to the next methods discussed by us.

force restart iphone

1C. Charge Your iPhone

Before installing the new update, make sure that your device has enough battery. Because if it does not have enough battery, you might face this issue. Besides the battery of your device, you should also have a good network and storage space on your iPhone to install the new update.

1D. Retry Updating After Some Time

Whenever Apple launches a new iOS update, many users around the world connect to its servers for the update immediately. Thus, on the Apple site, huge traffic is built up thereby preventing your iPhone from connecting with the server. This leads to the error that the iPhone software update failed. In this case, wait for a few hours before you start updating your device.

Also Read: How Long Do iPhone Chargers Last?

Method 2: Toggle Airplane Mode

Another method that you can try is this one. By enabling and disabling the Airplane mode, the wireless connections on your iPhone would disconnect and reconnect, thereby, fixing the unable to install update iPhone issue. Follow the below-mentioned steps, to toggle Airplane mode:

1. Swipe down from the top right corner of your iPhone screen to access the Control Center.

2. Then, turn on the toggle for the Airplane mode icon to enable it.

Note: If the Airplane mode icon is grey, it means that Airplane mode is off.

3. After some time, turn off the toggle for the Airplane mode icon to disable it again.

tap on airplane mode icon

After that, ensure that the unable to install update iOS 16 issue has been resolved.

Method 3: Free Up iPhone Storage

If you do not have sufficient space on your device, you can come across unable to install update iPhone or unable to install update iOS 15 issue. So, try to free up some space from your iPhone. To learn how to do it, read the steps discussed below:

1. Open the Settings app on your iPhone.

2. Next, tap on General > iPhone Storage.

choose iphone storage option

3. Now, the total storage space that you have used will appear on your screen. Tap on the desired app(s) from the list of apps.

4A. Tap on Offload App to clear the storage used by the app without affecting its data and documents.

4B. Or tap on Delete App to delete the selected app with all its data from the phone to free up some storage space.

choose offload app or delete app option

Also Read: How to Delete System Storage on iPhone

Method 4: Disable Low Power Mode

You can face the unable to install update iPhone problem if the low power mode is enabled on your device. So, turn it off to fix the issue. When low power mode is enabled on your iPhone, some features are disabled to preserve the battery. By enabling low power mode, the color of the battery level on your iPhone will change to yellow which was initially green. To turn off low power mode, abide by the steps given below:

1. Launch the Settings app on your iPhone.

2. Next, tap on the Battery option.

choose battery option

3. After that, turn off the toggle for the Low Power Mode option.

turn off the toggle for the Low Power Mode option

Method 5: Disable VPN

You can also try to disable the VPN if it is enabled on your iPhone to fix the issue. To do so, read below:

1. Navigate to the Settings app and tap on General.

2. Next, tap on the VPN & Device Management option.

tap on VPN & Device Management

3. Then, turn off the active VPN network.

Also Read: What is a VPN and how it works?

Method 6: Update iOS via iTunes

Using iTunes also you can install update on your iPhone. Follow the steps given below to update iPhone via iTunes:

1. Connect your iPhone to your PC/laptop using a USB cable.

2. Then, open the iTunes app on your PC and next click on the Device option located near the top left of the iTunes window.

3. After that, click on Summary > Check for Update.

click on Summary - Check for Update

4. Next, to install the update that is available, click on Update.

Method 7: Reset Network Settings

You can reset network settings on your iPhone to resolve the problem. By adopting this method to fix the unable to install update iPhone or unable to install update iOS 16 issue the previous Bluetooth devices, Wi-Fi networks, and stored network passwords, will be deleted. To reset network settings, read the steps given below:

1. Open Settings on your iPhone.

2. Then, tap on the General option.

Select General | unable to install update iPhone

3. Now, swipe down to the bottom and select Transfer or Reset iPhone.

Select Transfer or Reset iPhone

4. Tap on Reset.

Tap on Reset

5. Finally, tap on Reset Network Settings and enter your passcode.

Choose Reset Network Settings | unable to install update iPhone

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So, we hope you have understood how to fix the unable to install update iPhone to iOS 15 or 16 error with the detailed methods to your aid. You can let us know any queries or suggestions about any other topic you want us to make an article on. Drop them in the comments section below for us to know.

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