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Here’s How Long the iOS 16.5.1 Update Takes



Apple’s iOS 16.5.1 update is a point release, but it could still take quite a bit of time to install on your iPhone.

The company’s pushed a new iOS 16.5.1 update to iPhones that are compatible with iOS 16. The software brings fixes that address lingering issues with iOS 16.

If you’re moving your iPhone from the latest version of iOS 16 to iOS 16.5.1, you get the shortest list of changes and the smallest download size.

If you’re upgrading from an older version of iOS, your iOS 16.5.1 download could be fairly large because the changes from the update(s) you skipped are baked in.

While some of you might want to skip the iOS 16.5.1 download for the time being, most people should install the software today, or, at some point in the near future.

If you decide to install iOS 16.5.1 on your iPhone, you’ll want to set aside some time to get the upgrade properly installed on your device.

Moving a device from one version of an operating system to another can cause problems so you’ll want to monitor the download and installation.

We can’t tell you exactly how long the process will take because it will vary. That said, we can help you approximate how much time you should set aside should you choose to install the latest firmware on your iPhone.

Sync (Optional)5-45 Minutes
Backup and Transfer (Optional)1-30 Minutes
iOS 16.5.1 Download7 Minutes to 1 Hour
iOS 16.5.1 Installation8 Minutes to 20 Minutes
Total iOS 16.5.1 Update Time15 Minutes to 1 Hour+


Before you start the iOS 16.5.1 download make sure you’re prepared.

If you don’t know how to properly prepare for an iOS upgrade, take a look at our pre-installation guide. It’ll walk you through the most important steps to take before you start the installation process.

You should be able to get through these steps in 30 minutes, but it all depends on your skill level and the current state of your iPhone.

If you haven’t backed up your data in awhile or you if you aren’t familiar with iOS 16.5.1, the pre-installation process could take you a longer.

You don’t need to follow every single step in the guide, but at the very least you’ll want to make sure your phone’s data is backed up properly.

Data loss issues are pretty rare, but if you store sensitive data (photos, videos, etc) on your device, it’s always better to err on the side of caution.

iOS 16.5.1 Download

Once you’ve prepared, it’s time to start the download process.

Again, the exact size of your iOS 16.5.1 download will depend on your iPhone model and the version of iOS it’s currently running.

If your phone is on the latest version of iOS 16, you’ll see the smallest download size. If it’s running an older version, your download will be larger.

If you’re connected to a fast Wi-Fi network, the iOS 16.5.1 download should finish up in 10 minutes or so. If your connection is slower, or you’re downloading during peak hours, it could take longer. In some cases, much longer.

iOS 16.5.1 Installation

Once your device is done pulling iOS 16.5.1 from Apple’s servers, the installation process will begin.

On newer iPhones, the iOS 16.5.1 installation process could take 10 minutes or less to complete. It took about eight minutes to install on an iPhone 12 Pro that was previously running iOS 16.5.

Your iPhone might reboot itself a couple of times during the installation process, but this is perfectly normal. Your device should boot up in regular fashion once the installation process completes.


After the installation finishes up, you might need to spend time logging into your iCloud account or signing into your device’s various apps and services.

You also might want to spend some time checking your important data (photos, music, etc) to make sure everything carried over properly.

After you do that, make sure you test your core applications and services to ensure they’re working normally. New versions of iOS can cause apps to go haywire.

If you notice an issue with one or more of your apps, try downloading the latest version. Developers are currently rolling out iOS 16 support updates.

You’ll also want to poke around your phone for bugs and performance issues. If you notice something take a look at our list of fixes for common iOS 16 problems.

4 Reasons Not to Install iOS 16.5.1 & 11 Reasons You Should

Install iOS 16.5.1 for Better Security

Install iOS 16.5.1 for Better Security

If security is important to you, think about installing Apple's iOS 16.5.1 update on your iPhone right away.

iOS 16.5.1 brings two security patches to iPhone users and they're important if you want to keep your iPhone protected from harm. If you want to learn more, head on over to Apple's website.

As for older software, iOS 16.5 brought a ton of security patches to the iPhone. You can find out more about them over on Apple's security site.

iOS 16.4.1 included two security upgrades . You can learn more about the pair right here.

The company's iOS Security Response 16.4.1 (a) update also included security updates, but Apple hasn't revealed them yet and it's unclear if it will.

Apple's iOS 16.4 update had a substantial number of patches on board. You can read about them in detail over on Apple's security site.

The iOS 16.3.1 update had three security patches on board including one for an actively exploited vulnerability. For more on the security contents of iOS 16.3.1, check out Apple's security page.

 iOS 16.3 brought 10+ new security patches with it and you can learn more about all of those right here

In addition, the software came with support for physical security keys for Apple ID. These will beef up your account security by requiring a physical security key as part of the two factor authentication sign in process. Learn more about the change right here.

If you skipped iOS 16.2, you'll get its changes with iOS 16.5.1. iOS 16.2 brought a ton of important security patches with it and you can dig into the details on Apple's security site

The update also brought end-to-end encryption to iCloud, iMessage, iPhone backups, Notes, Photos, and more. If you want to learn more about it, head over to Apple's guide

If you decided to missed iOS 16.1.2, you'll get its solitary security patch with your upgrade. Learn more about it right here.

If you skipped iOS 16.1.1, you'll get its security patches when you upgrade. You can learn more about them right here.

If you missed the iOS 16.1 update, it brought 19 security patches to the iPhone and you can learn about the particulars of those over on Apple's website.

If you failed to download iOS 16.0.3, it had one security patch on board, a fix for a potential exploit within the Mail app. For more about the fix, check out Apple's security site.

If you're still running iOS 15 your iPhone, you'll get a bunch of other patches when you upgrade.

iOS 16.0 brought a ton of security patches to the iPhone. If you're interested in the exact nature of these improvements, you can read about them over on Apple's security website.

In addition to those patches, iOS 16 brings some additional enhancements to privacy and security including Safety Check which, according to Apple, will help "people in domestic or intimate partner violence situations review and reset the access they’ve granted others." 

The feature also resets system privacy permissions for apps and restricts Messages and FaceTime to the device on hand.

Apple's also made some improvements to Passkeys in Safari. iOS 16 brings a brand new sign-in method that's end-to-end encrypted and safe from phishing and data leaks. 

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