How to Update Your iOS on Your iPhone

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A guide to updating your iPhone software

Reviewed by Luigi Oppido

Last Updated: April 18, 2025

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Updating Wirelessly

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Updating Using iTunes

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Troubleshooting iPhone Updates

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Q&A

Updating your iPhone will allow you to benefit from Apple’s latest iOS enhancements and features, as well as make your device more compatible with the newest apps from iTunes App Store. You can either update your iPhone wirelessly using over-the-air updates, or install the latest updates using iTunes.

A Quick Guide to Updating Your iOS

Open “Settings,” then navigate to “General.” Click on “Software Update,” then tap “Download and Install.” Enter your passcode if necessary. Apple should then download and install the latest updates to your device. This process may take several minutes to complete.

Method 1

Method 1 of 3:

Updating Wirelessly

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1
Back up and save your personal data to iCloud or iTunes. This will help prevent data loss in the event the update fails to complete.
- Tap on “Settings” > “iCloud” > “Backup,” then tap on “Back Up Now.” Alternately, follow these steps to back up your iPhone to iTunes.
This will prevent your device from powering down unexpectedly at any point during the update.

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Tap on “Install,” then enter the passcode for your iPhone, if applicable. Apple will download and install the latest updates to your device, which may take up to several minutes to complete.^{[1]
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- If your iPhone displays an error saying it lacks enough free space to complete the update, either delete apps from your device manually to free up space, or follow the steps outlined in Method Two to update your iPhone using iTunes.

Method 2

Method 2 of 3:

Updating Using iTunes

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1
Back up and save your personal data to iTunes or iCloud. This will help prevent data loss in the event the update fails to complete.
- Tap on “Settings” > “iCloud” > “Backup,” then tap on “Back Up Now.” If you want your data backed up using iTunes, continue with the following steps.
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Your iPhone can only be updated using iTunes if iTunes is running the latest software.
iTunes will take a few moments to detect your device.
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Click on your iPhone when it displays in iTunes, then click on the “Summary” tab.
- If you need to back up your iPhone to iTunes, click on “File,” point to “Devices,” and select “Back Up.” Proceed with the following steps when the backup process is complete.
” iTunes will install the latest iOS updates to your iPhone.

Method 3

Method 3 of 3:

Troubleshooting iPhone Updates

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Install any available OS updates from Microsoft Windows or Apple on your computer if you are unable to update your iPhone using iTunes. In some cases, running older versions of software on your computer can prevent iTunes from communicating with Apple’s servers.
- Windows: Click on “Start” and select “Control Panel,” then click on “System” and select “Automatic Updates.”
- Mac OS X: Click on the Apple menu, and select “Software Update.”
Try disabling or uninstalling any security software running on your computer if you are unable to update your iPhone using iTunes. Some third-party software programs can interfere with your being able to install the latest iOS updates in iTunes.
Printers, scanners, USB flash drives, and other USB-compatible devices may interfere with the installation of iOS updates.^{[2]
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In some cases, restarting your devices can help correct any bugs or problems interfering with the update process.^{[3]
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Problems with faulty hardware can prevent your computer from detecting your device and installing the latest iOS updates using iTunes.

Community Q&A

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Question

Can I update while sleeping?

Living Concrete

Top Answerer

You can set your iPhone to update at a specific time. When it asks if you'd like to update now or later, simply select "Later." The iPhone will update at 2 or 3 in the morning (presumably while you are asleep). If you are asking whether or not an iPhone can update while it's off/sleeping, the answer is no, it cannot.

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Question

My iPhone is a 4s and it doesn't show any updates available in the software update section. What is my problem?

WikiWiki01

Community Answer

Your iPhone doesn't support the newest iOS versions anymore, because it can't handle the newest version.

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