If security is important to you, you'll want to think about installing Apple's iOS 15.7.4 update right away.

iOS 15.7.4 brings important security fixes to older iPhone models. They are essential if you want to keep your device and its data safe from harm. For more details, check out Apple's guide.

As for older updates, iOS 15.7.3 also brought a new batch of security patches to iPhone. You can learn more about these changes right here.

iOS 15.7.2 brought numerous patches along with it. For more about them, head over to Apple's website for more details.

iOS 15.7.1 update brought 17 security patches with it while iOS 15.7 delivered 11 security patches to iPhone. If you want a look at the details, head over to Apple's security site for more information.

If you missed iOS 15.6.1, it had two security patches on board. You can read more about the pair on Apple's website.

If you missed Apple's iOS 15.6 update, it had 30+ security upgrades on board. You can learn more about them right here.

If you missed iOS 15.5 it brought 27 new security patches to the iPhone. You can learn more about these patches over on Apple's security site.

If you missed iOS 15.4.1, it had one new security patch on board. You can read more about it over on Apple's website. 

If you missed the iOS 15.4 update, it had a whopping 36 new security patches on board. If you want to learn more about these patches, head on over to Apple's security site for the particulars. 

If you missed iOS 15.3.1, it had one security patch on board. For more about it, head over to Apple's security page. 

If you missed iOS 15.3, you'll also get its patches with your upgrade. iOS 15.3 brought 10 new security patches to iPhone users. If you're interested in the details, you can read more about them right here.

If you missed iOS 15.2.1, you'll get its security patch with your upgrade. You can learn more about the change over on Apple's website. 

If you missed Apple's iOS 15.2 update, you'll get its 30+ security patches with your upgrade. You can read all about them over on the company's security site. 

iOS 15.2 also included some important upgrades to privacy. The software brought the company's App Privacy Report to Settings. This lets you see how often your apps have accessed your location, photos, camera, microphone, contacts and more during the last seven days. You can also see their network activity. 

In addition, iOS 15.2 brought Apple's communication safety features for kids. You'll find these features in the Messages app, in Siri, in Spotlight, and in Search. 

If you missed iOS 15.1, iOS 15.7.4 will bring its security patches to your iPhone. You can read more about them on Apple's website. 

If you missed iOS 15.0.2 you'll also get its security patch with your upgrade. You can learn more about it right here.

iOS 15.0 also brought numerous security patches to your iPhone. If you'll be moving up from iOS 14 and you're interested in the exact nature of these improvements, you can read about them over on Apple's security website.

Apple's updated its website with new information about iOS 15's batch of security patches. The company now says the software patched up an issue that could have exposed a user's private Apple ID information and in-app search history. It also says iOS 15 patched up an issue that allowed apps to override Privacy preferences.

If you skipped iOS 14.8 or any older versions of iOS, you'll get the security patches from those updates with your iOS 15.7.4 update as well. 

In addition to those patches, iOS 15 comes with some security and privacy upgrades including improvements to Siri. Requests made to Siri are now processed on the device itself using Neural Engine. This makes it more secure. 

If you're an Apple Card user, you'll now get a security code that changes regularly to use when you make online transactions. 

Apple's also included a built-in authenticator that's similar to Google Authenticator. This will let you generate verification codes for enhanced sign-in security under your Passwords.

There's also a Mail feature that hides your IP address.