Apple’s iOS 16.6.1 update should alleviate some issues, but there are still problems plaguing iOS 16 and the iPhone as we push away from the company’s latest software release.

Some iPhone users are noticing an improvement after upgrading to the latest version of iOS 16. On the flip side, some iPhone users have run into a variety of bugs and performance issues. Some of these issues have carried over from older iOS software, others are brand new.

In this guide to iOS 16 problems we’ll take you through the current state of these issues. We’ll show you where to find potential fixes for the most common iOS 16 problems and provide you with some resources that will help if you run into trouble.

We’ll also touch on the state of the iOS downgrade and outline what you can expect from Apple and iOS 16 down the road.

iOS 16 Problems

The current list of iOS 16 problems includes some very common issues. We’re currently seeing complaints about the following problems:

• UI lag
• AirPlay issues
• Touch ID and Face ID issues
• Safari issues
• Battery life problems
• Issues with the Mail app
• iMessage issues
• GPS issues
• Problems with AirDrop
• Issues with iMovie and Final Cut Pro
• Spotlight problems
• Data transfer issues
• Camera issues
• Wi-Fi problems
• App Store problems
• Bluetooth problems
• CarPlay issues
• Lockups, freezes, and crashes

We expect the list of iOS 16 problems to grow as more iPhone users transition from iOS 15 to iOS 16 and from older versions of iOS 16 to the latest version.

If you haven’t downloaded the newest version of iOS 16 yet, we recommend preparing your iPhone for the download. Some prep work ahead of time can help you avoid major headaches.

We’ve put together a step-by-step pre-installation process and it will take you through the best way to prepare for the move.

Where to Find iOS 16 Reviews

If you’re currently running iOS 16 on your iPhone, or if you’re planning to upgrade, you’ll want to sift through feedback from other users. This feedback will alert you to potential problems and performance issues others are having on the same iPhone model.

We’ve released our list of reasons to, and not to, install Apple’s latest iOS 16 update and it’s a good starting point for those of you weighing a move up from iOS 15. It will also help if you’re already on iOS 16 and you’re thinking about moving to the latest version.

We’ve also released a guide that goes over the iOS 16.6.1 update’s performance. It’s also a worth a look if you need additional feedback.

We also recommend keeping an eye on YouTube, Apple’s discussion forums, social media sites like Twitter and Facebook, and the MacRumors forums for additional feedback about iOS 16’s performance.

How to Fix iOS 16 Problems

Some problems might require a fix from Apple in a future iOS update. Others, you may be able to fix on your own.

Before you get in contact with Apple customer support, take a look at our list of fixes for the most common iOS 16 problems.

We’ve also released tips that could help you improve your device’s performance and a guide that shows you how to fix iOS 16 battery life problems. If you’re running into severe battery drain issues after installing iOS 16, have a look at those.

If you can’t find what you’re looking for in our guides, you should head on over to Apple’s discussion forums. If they can’t help you, you might want to get in contact with Apple Support via Twitter or via the company’s website.

If you still can’t fix your issue(s), you might want to schedule an appointment to see a Genius at your local Apple Store. They should be able to diagnose your problem.

iOS Downgrade Status

If you run into bugs or performance issues on iOS 16, you might try downgrading your iPhone’s software in an effort to improve its performance.

Apple’s currently signing on iOS 16.6 which means you can downgrade back to the previous version of iOS 16. Unfortunately, you can’t downgrade to any iOS software older than iOS 16.6.

For more about how the downgrade process works, take a look at our walkthrough.

What’s Next

If your iPhone is struggling on iOS 16.6.1 or an older version of iOS, you’re on your own for the time being.

iOS 16.6.1 was the last known update in Apple’s iOS 16 pipeline, but it looks like the company might be working on a new iOS 16.7 update. If it is, it should roll out in September alongside Apple’s new iOS 17 operating system.

The company will push iOS 17 to the iPhone in mid-to-late September. Unfortunately, Apple will drop support for three older iPhone models: iPhone X, iPhone 8, and iPhone 8 Plus. Those devices will stay on iOS 16.

With iOS 16.7 reportedly on the way, it looks like Apple will continue to support these devices with security patches and occasional bug fixes.

For more about iOS 17 and its release, have a look at our guide.

Install iOS 16.6.1 for Better Security

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If security is important to you, think about installing Apple's iOS 16.6.1 update on your iPhone right away. iOS 16.6.1 isn't a huge upgrade, but it does have two important security patches for your device on board. If you're interested in what they patch up, here's Apple's guide.  As for older software, the iOS 16.6 update delivered 16 security patches. For more information about the changes, check out Apple's rundown.   iOS 16.5.1 brought two security patches to iPhone users  If you want to learn more, head on over to Apple's website. The company's iOS Security Response 16.5.1 (c) update also included a security update and you can learn more about it right here. 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. 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 16.6.1. 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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iOS 16 Problems: 5 Things You Need to Know is a post by Adam Mills from Gotta Be Mobile.

Apple’s iOS 16.6.1 update could have a huge impact on your iPhone’s performance. While some iPhone users should install the  software right now, others might want to wait before moving up from iOS 15 or older versions of iOS 16.

iOS 16.6.1 is Apple’s latest iOS 16 upgrade and it’s available to download right now if you own an iPhone 8 or newer, all the way up to the iPhone 14 series. The software brings important fixes to compatible iPhone models.

The iOS 16.6.1 update requires a fairly small download if you’re moving your iPhone up from 16.6. It may be larger for those moving up from older versions of iOS. That’s because the features and fixes from the updates you skipped are baked into your version of the update.

Those of you dealing with issues on iOS 16.6.1 or an older version of iOS could see a huge turnaround after installing iOS 16.6.1. We’re already hearing about positive changes. That being said, we’re also hearing about various bugs and performance problems.

If you do run into an issue, note that you can downgrade your iPhone’s software back to iOS 16.6 if needed. The company’s currently signing on the previous version of iOS 16, but it’s not signing on older versions of iOS.

This means those of you having a great experience on iOS 16.5.1, and older versions of iOS, need to approach iOS 16.6.1 with a sense of caution. Once you make the move, you can’t get back to your phone’s current version of iOS.

If you’re currently debating a move to iOS 16.6.1, allow us to walk you through the best reasons to install the software today and the best reasons to hang around on your current version of iOS 16 for a little bit longer.

Install iOS 16.6.1 for Better Security

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If security is important to you, think about installing Apple's iOS 16.6.1 update on your iPhone right away. iOS 16.6.1 isn't a huge upgrade, but it does have two important security patches for your device on board. If you're interested in what they patch up, here's Apple's guide.  As for older software, the iOS 16.6 update delivered 16 security patches. For more information about the changes, check out Apple's rundown.   iOS 16.5.1 brought two security patches to iPhone users  If you want to learn more, head on over to Apple's website. The company's iOS Security Response 16.5.1 (c) update also included a security update and you can learn more about it right here. 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. 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 16.6.1. 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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4 Reasons Not to Install iOS 16.6.1 & 11 Reasons You Should is a post by Adam Mills from Gotta Be Mobile.

As we push away from the latest iOS 16 release we’re hearing about the bugs and performance issues plaguing Apple’s latest software.

The current list of iOS 16 problems includes abnormal battery drain, Wi-Fi issues, UI lag, crashes, Touch ID issues, and installation issues. A lot of these problems are brand new, others have carried over from older versions of iOS 16.

While some of these issues will require a fix from Apple in a new version of iOS 16 or perhaps a visit to your local Apple Store, some issues can be fixed in minutes from the comfort of your home.

In this guide we’ll take you through potential fixes for the most common iOS 16 problems we’ve heard about or seen on our iPhones.

If you’re noticing abnormal battery drain, issues with your Wi-Fi or Bluetooth connectivity, or if you’re having issues installing iOS 16, have a look through these fixes before you contact customer support or take your iPhone into a store.

How to Fix iOS 16 Freezing

If your iPhone locks up and stops responding, here’s how to get it unstuck.

In order to get your iPhone unstuck, try performing a hard reset. Here’s how to do that if you own an iPhone 14, iPhone 13, iPhone 12, iPhone 11, iPhone XS, iPhone XR, iPhone X, iPhone 8, iPhone 7, iPhone 6s, iPhone SE 2, or iPhone SE.

For more iOS 16 performance fixes, check out our guide.

How to Fix iOS 16 Battery Life Problems

If you encounter battery life issues after installing the latest version of iOS 16, there are a few things you can try.

If you’re experiencing extreme battery drain after installing Apple’s newest firmware, take a look at our list of fixes. They could help.

If nothing in that guide works, there’s a chance you’ve got a bad battery. If you determine that might be the case, you’ll need to get in touch with Apple about a replacement.

If you live near an Apple Store, make an appointment at the Genius Bar. They should be able to diagnose your problem in minutes.

If you don’t have an Apple Store near you, you’ll want to get in contact with Apple customer service.

How to Fix iOS 16 Bluetooth Problems

If you’re unable to connect your iPhone to a Bluetooth device, here are a few solutions that have worked for us in the past.

First, you’ll want to forget the Bluetooth connection on your iPhone. Here’s how to do that:

• Head into your Settings.
• Tap Bluetooth.
• Select the connection using the “i” in the circle.
• Tap “Forget this Device”.
• Try reconnecting.

If that doesn’t work, try resetting your iPhone’s Network Settings:

• Go to your Settings.
• Tap General.
• Tap Transfer or Reset iPhone.
• Tap Reset.
• Tap on Reset Network Settings.

This process will take a few seconds to complete. It will also cause your iPhone to forget known Wi-Fi networks so make sure you’ve got your password(s) handy.

You can also try resetting your iPhone’s settings back to their factory defaults. Here’s how to do that:

• Head into Settings.
• Tap General.
• Tap Reset.
• Tap Reset Transfer or Reset iPhone.
• Tap Reset.
• Tap Reset All Settings.
• Enter your passcode if you have one enabled.

Bluetooth issues can be difficult to fix so if none of these solutions work, you might need to get in contact Apple’s customer service or the company who makes the product you’re trying to connect to.

How to Fix iOS 16 Wi-Fi Issues

If you’re noticing slower than normal Wi-Fi speeds and/or your connection is continually dropping, here are some steps you can take to try and fix these issues.

If you’re on your home Wi-Fi network, try unplugging the router and/or modem for minute before plugging it back in. This could help.

If you can’t access the router and/or modem you’re connected to, or if you’re positive the issue has nothing to do with your router/modem, head into your iPhone’s Settings app.

Here you’ll want to forget the Wi-Fi network that’s giving you a headache. Here’s how to do that:

• In the Settings app, tap Wi-Fi.
• Select your connection by tapping the “i” in the circle.
• Tap Forget this Network at the top of the screen.

If this doesn’t work, try resetting your phone’s Network Settings:

• Go to your Settings app.
• Tap General.
• Tap Transfer or Reset iPhone.
• Tap Reset.
• Tap on Reset Network Settings.

If none of those help, you’ll want to check out Apple’s guide to Wi-Fi problems.

How to Fix iOS 16 Cellular Data Issues

If you’re seeing a “No Service” symbol and/or your iPhone can’t connect to your cellular network, here are a few steps to take.

First, make sure there isn’t a cellular outage in your area. Check social media for reports and/or get into contact with your service provider on social media. We also recommend checking Down Detector to see if others in your area are having similar issues.

If you determine the issue is unrelated to a network outage, you’ll want to restart your iPhone and see if that fixes the connection.

If you still can’t get it to work, you’ll want to try toggling Cellular Data off and on. Here’s how to do that:

• Go to Settings.
• Tap Cellular.
• Toggle Cellular Data to off.
• Leave it off for a minute and toggle it back on.

If that doesn’t work, try turning Airplane Mode on for 30 seconds before turning it off. Airplane Mode kills all of the connections on your device.

If nothing here works, it may have something to do with your account. If you think that could be the case, get in contact with your service provider.

How to Fix iOS 16 FaceTime Issues

If you’re having trouble making or receiving FaceTime calls, you’ll want to make sure Apple isn’t having issues with the service. If FaceTime has a green symbol next to it, the issues are probably on your end.

First, make sure your iPhone is properly connected to Wi-Fi or your cellular network. If it is, make sure FaceTime is turned on. Here’s how to do that:

• Head into Settings.
• Tap FaceTime.
• If you notice a message that says “Waiting for Activation”, turn FaceTime off and then toggle it back on.

If FaceTime is on and you’re connected to Wi-Fi or a cellular network, try restarting your iPhone.

If you’re having trouble connecting via FaceTime over a cellular network, make sure cellular data is currently turned on for FaceTime. Here’s how to check that:

• Head into Settings.
• Tap Cellular.
• Scroll Down and make sure FaceTime is toggled on.

How to Fix iOS 16 App Issues

If one or more of your applications start acting up after you move to the latest version of iOS 16, here are a few things you can try before getting in contact with the developer.

First, try restarting your iPhone. If that doesn’t improve the app’s performance, you’ll want to check the App Store for an update. Developers are still pushing iOS 16 support updates and the downloading latest version of the app could help.

You can also try deleting the app and downloading it again.

If you can’t fix the issue yourself, get in contact with the app’s developer and see if it knows about the issue. If it does, it might have a manual fix or an ETA on an update that will address the issue.

How to Fix iOS 16 Random Reboots

If your iPhone starts randomly rebooting, here are a few fixes to try before getting in contact with Apple.

First, restart your device. If you haven’t turned your device off in awhile, this could solve the issue.

If you’re still seeing random reboots, go ahead and update all of your applications and see if that solves the issue. If it doesn’t, you might need to have a chat with Apple’s customer service.

For more on how to fix iOS 16 performance issues, have a look at our guide.

How to Fix iOS 16 Visual Voicemail Issues

Visual Voicemail sometimes breaks after Apple releases a new version of iOS. If you can’t get visual voicemail to work properly on your phone, here are a few things to try.

First, try letting the voicemail play all the way through. Once it’s done, exit the Phone app and re-open it. If that doesn’t work, you’ll want to restart your iPhone.

How to Fix iOS 16 GPS Issues

If GPS starts acting up after you move your iPhone to the latest iOS 16 firmware, try restarting the device before you do anything else.

If that doesn’t work, you’ll want to try toggling Airplane Mode on and off. If it’s still acting up, go into your location permissions and make sure you’re permitting the app, or apps, to use GPS. Here’s how to do that:

• Go to Settings.
• Tap Privacy.
• Tap Locations Services at the top.
• Tap on the app in question and make sure you’re using something other than “Never.” If you have Never selected, GPS won’t work.

You can also try toggling Location Services off and on. Here’s how to do that:

• Go to Settings.
• Tap Privacy.
• Tap Locations Services at the top.
• Toggle Location Services off, wait a few seconds, and toggle it back on.

If you still can’t get GPS to work properly, try resetting your device’s Network Settings:

• Go to your Settings.
• Tap General.
• Tap Transfer or Reset iPhone.
• Tap Reset
• Tap Reset Network Settings.

Update Your iPhone

Apple will periodically release new software. Point updates (iOS 16.x.x) are typically focused on fixing bugs while milestone upgrades (iOS 16.x) usually deliver a mix of features and fixes.

The company may not call out general fixes (ex. a fix for Bluetooth issues) in an update’s change log, but new software always has the potential to help.

For more on the latest version of iOS 16, take a look at our guide.

Downgrade

If you can’t fix your issue and you can’t wait for the next version of iOS 16, you can try downgrading back to a previous version if the option is available. This could help improve your phone’s performance.

If you don’t know how to downgrade your iPhone’s software, take a look at our walkthrough.

Restore as New

If your phone is really struggling on iOS 16, you can try restoring your iPhone as new. You can do this via Finder, iTunes, or iCloud. This should only be used as a last resort.

Install iOS 16.6.1 for Better Security

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If security is important to you, think about installing Apple's iOS 16.6.1 update on your iPhone right away. iOS 16.6.1 isn't a huge upgrade, but it does have two important security patches for your device on board. If you're interested in what they patch up, here's Apple's guide.  As for older software, the iOS 16.6 update delivered 16 security patches. For more information about the changes, check out Apple's rundown.   iOS 16.5.1 brought two security patches to iPhone users  If you want to learn more, head on over to Apple's website. The company's iOS Security Response 16.5.1 (c) update also included a security update and you can learn more about it right here. 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. 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 16.6.1. 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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10 Common iOS 16 Problems & How to Fix Them is a post by Adam Mills from Gotta Be Mobile.

As we push away from the latest iOS 16 update’s release we’re hearing about a variety of performance issues plaguing iPhone users.

While many iPhone users are having a great experience on Apple’s latest software, others are complaining about bugs and performance problems.

The current list of iOS 16 performance issues includes UI lag, freezes, lock ups, and random reboots. These are extremely common, particularly on aging iPhone models. Newer models like the iPhone 14 series aren’t immune to performance problems though.

Performance issues can be difficult to fix. While you might be able to fix some problems on your own, others may require a fix from Apple in a new software update. In some cases, you may need to contact Apple support or bring your iPhone into an Apple Store.

If you can’t wait for a new version of iOS 16 and/or you don’t have time to get in touch with Apple support, we have some fixes that could help fix the iOS 16 performance issue(s) you’ve encountered on your phone.

Restart Your Phone

If you start noticing UI lag or another performance issue after installing the latest version of iOS 16, try restarting your iPhone. Power it down, leave it off for a minute, and the turn it back on. This has resolved many issues for us in the past.

Update Your iPhone

Apple will occasionally push new iOS 16 software to your iPhone. The company’s point updates (x.x.x) are typically focused on fixing bugs while milestone upgrades (x.x) usually deliver a mix of new enhancements.

The company might not call out performance fixes in an iOS 16 update’s change log, but new software always has the potential to help (or, in some cases, hurt) your iPhone’s overall performance.

For more on the latest version of iOS 16, take a look at our guide.

Update Your Apps

If you haven’t done so already, make sure you update your applications to the latest version.

App developers are rolling out iOS 16 support updates and they could help stabilize iOS 16’s performance on your iPhone.

Before you install the latest version of an app you’ll want to go into the App Store and read reviews from other iOS 16 users. If the reviews are mostly good, download the latest version

Cleanup Your iPhone’s Storage

If you’ve had your iPhone for awhile you might have a ton of clutter taking up space on its internal storage. Deleting unnecessary files could help speed up your iPhone. This is especially true if you’re almost out of storage.

To start, you’ll want to check and see how much space is free on your iPhone. Here’s how to do that:

• Head into Settings.
• Tap General.
• Tap iPhone Storage.

Apple makes some recommendations based on your utilization of your iPhone’s storage, but you can also just go through each section manually delete files you no longer need.

Stop Using Background App Refresh

iOS’ Background App Refresh feature refreshes apps in the background to show you the latest data when you open them up. It also makes your phone work in the background. So, if you don’t need this, you might want to shut the feature off. Here’s how to do that:

• Go into the Settings app.
• Tap General.
• Tap Background App Refresh.
• At the top of this screen tap Background App Refresh and toggle it off.

If you want to keep it on for some apps, leave it on and then go down your list of apps and manually turn it off for apps you don’t use.

Reset All Settings

If you’re still not getting the kind of performance you’d like out of your iPhone, try resetting your settings. Here’s how to do that:

• Go to Settings.
• Tap General.
• Tap Reset Transfer or Reset iPhone.
• Tap Reset.
• Tap Reset All Settings.
• Enter your passcode if you have one enabled.

This will restore your iPhone’s settings to their factory defaults.

Downgrade

If you can’t find a fix for your problem and/or don’t want to wait for Apple’s next iOS 16 update, you can try downgrading back to the previous version of iOS. Your downgrade options will change over time and sometimes downgrading won’t be available.

For more on the iOS downgrade process, take a look at our walkthrough.

Restore

If you can’t find a fix for your issue, and you want to avoid taking your iPhone into a store, you might want to restore your device. This should only be used as a last resort.

You can do this via Finder, iTunes, or iCloud.

Install iOS 16.6.1 for Better Security

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If security is important to you, think about installing Apple's iOS 16.6.1 update on your iPhone right away. iOS 16.6.1 isn't a huge upgrade, but it does have two important security patches for your device on board. If you're interested in what they patch up, here's Apple's guide.  As for older software, the iOS 16.6 update delivered 16 security patches. For more information about the changes, check out Apple's rundown.   iOS 16.5.1 brought two security patches to iPhone users  If you want to learn more, head on over to Apple's website. The company's iOS Security Response 16.5.1 (c) update also included a security update and you can learn more about it right here. 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. 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 16.6.1. 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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How to Fix iOS 16 Performance Problems is a post by Adam Mills from Gotta Be Mobile.