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5 Things to Know About the iOS 15.2.1 Update

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Apple’s pushed an iOS 15.2.1 update to iPhone users.

iOS 15.2.1 is compatible with all iOS 15-powered phones, a list that includes iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone SE 2, iPhone 12 mini, iPhone 12, iPhone 12 Pro, iPhone 12 Pro Max, and the iPhone 13 series.

Unlike iOS 15.2, the iOS 15.2.1 update is a small point upgrade. It brings important bug fixes to owners and it also has an important security patch on board.

With that in mind, we want to take you through everything you need to know about Apple’s iOS 15.2.1 update for iPhone.

In this walkthrough we’ll take you through iOS 15.2.1’s changes, the software’s performance, iOS 15.2.1 problems, the iOS 15.2.1 jailbreak status, and more.

We’ll start with some quick thoughts on iOS 15.2.1’s performance.

iOS 15.2.1 Review

If your iPhone is currently running iOS 15.2, you’ll see the smallest iOS 15.2.1 download size.

For iOS 15.2 users, the iOS 15.2.1 download is fairly large. iOS 15.2.1 is around 911MB for iPhone 12 Pro users moving up from the previous version of iOS 15. You can expect a similar size for other iPhone models.

The exact iOS 15.2.1 download size depends on your iPhone model and the version of iOS it’s currently running. So if your iPhone is running an older version of iOS, you’ll see a bigger download because your iOS 15.2.1 update includes the changes from any iOS updates you skipped.

If you’re moving up from iOS 15.2, the installation process should take less than 10 minutes to complete. It took about seven minutes to install on an iPhone 12 Pro that was previously running iOS 15.2.

We’ve been using iOS 15.2.1 on a few iPhone models for several days and here’s what we’ve learned about the software’s performance thus far:

Connectivity

  • Battery life is currently stable.
  • Wi-Fi connectivity is fast and reliable.
  • Bluetooth is working normally.
  • GPS and cellular data are both stable.

App Performance

  • Third-party apps including Netflix, Dark Sky, Twitter, Slack, Asana, Gmail, Chrome, and Spotify are working fine at the moment.
  • First party apps like Safari, Podcasts, and Calendar are also stable.

Speed

  • iOS 15.2.1 feels as fast as iOS 15.2.

If you’re running into bugs or performance issues on iOS 15.2 or an older version of iOS, you might want to install the iOS 15.2.1 update on your iPhone right now.

If you need help making a decision about whether or not to make the jump up to iOS 15.2.1, please check out our reasons to, and not to, install the latest version of iOS 15.

iOS 15.2.1 Problems

The iOS 15.2.1 update is causing problems for some iPhone 12 and iPhone 13 users. Some of these problems are brand new, others have carried over from iOS 15.2 and older versions of iOS.

The current list includes installation issues, UI lag, Exchange issues, problems with first and third-party apps, touchscreen issues, issues with Touch ID and Face ID, charging issues, and stuttering.

If you encounter a problem on iOS 15.2.1, have a look at our list of fixes for the most common iOS 15 problems. We’ve also released tips that could help you improve your phone’s performance and some tips that could help fix bad iOS 15 battery life.

Apple is currently signing on iOS 15.2 which means you can drop your iPhone’s software back to the previous version of iOS 15 if iOS 15.2.1 starts causing problems. You can’t downgrade to anything older than iOS 15.2.

Keep this in mind if you’re having a good experience on iOS 15.1.1 or older. Once you make the move to iOS 15.2.1, you won’t be able to go back.

For more on the downgrade process, check out our guide.

iOS 15.2.1 Update: What’s New

Again, iOS 15.2.1 doesn’t have any new features on board. Instead, the software includes bug fixes and a security patch.

Here’s the full iOS 15.2.1 change log:

  • Fixes an issue where Messages may not load photos sent using an iCloud Link.
  • Fixes an issue where third-party CarPlay apps may not respond to input.

Apple says the software also comes with a security patch and you can read more about it right here.

iOS 15.2.1 Jailbreak

The developer teams behind the Checkra1n and unC0ver jailbreaking tools have released versions that are compatible with newer versions of iOS 14, but only Checkra1n (currently in beta) is compatible with iOS 14.5. They don’t support iOS 15.2.1, iOS 15.2, iOS 15.1.1, iOS 15.1, iOS 15.0.2, iOS 15.0.1, iOS 15.0, iOS 14.8, iOS 14.7.1, iOS 14.7, iOS 14.6, or iOS 14.5.1 yet.

The newest version of unC0ver is compatible with newer iPhones including the iPhone 12 series. That’s big news if you’ve been waiting to jailbreak your new phone. Unfortunately it’s only compatible with versions up to iOS 14.3.

There’s no way to downgrade your phone’s software to iOS 14.5 or older versions of iOS which means you’re out of luck if you upgrade, or you already upgraded to newer iOS software.

What’s Next

Apple’s confirmed a new version of iOS 15 and iOS 15.3 is currently in beta testing ahead of its public release. The company hasn’t confirmed a specific release date yet, but it should drop sometime in early 2022.

If your problems on iOS 15.2.1 are really bad, or you just want to try new features, you can download the iOS 15.3 beta onto your iPhone 12 or iPhone 13 right now.

For more on iOS 15.3 and the beta, have a peek at our walkthrough. For more about the upcoming iOS 15.3 release date, check out our guide.

4 Reasons Not to Install iOS 15.2.1 & 11 Reasons You Should

Install iOS 15.2.1 for Better Security

Install iOS 15.2.1 for Better Security

If security is important to you, think about installing Apple's iOS 15.2.1 update right away.

iOS 15.2.1 brings a security patch to iPhone users. 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 15.2.1 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.

If you skipped iOS 14.8 or any older versions of iOS, you'll get the security patches from those updates with your iOS 15.2.1 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. The company will add a new App Privacy report feature in the next version of iOS 15 that will tell you when an app has accessed sensitive information. 

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