In 2024, Effective Ways To Fix Checkra1n Error 31 On Apple iPhone 15 Plus

In 2024, Effective Ways To Fix Checkra1n Error 31 On Apple iPhone 15 Plus

Lydia Lv12

Effective Ways To Fix Checkra1n Error 31 On Apple iPhone 15 Plus

Apple distinguishes itself as a leading smartphone manufacturer by implementing rigorous security protocols. These measures pose challenges for users seeking to jailbreak their iOS devices. Such actions grant users the capability to remove the restrictions enforced by Apple on their devices.

Serving as the primary tool for this purpose, Checkra1n emerges as a popular choice. Nevertheless, similar to any other tool, Checkra1n may face a range of issues, among which Checkra1n Error 31 is notably notorious. This guide aims to help you address Checkra1n Error 31. Moreover, it will introduce a powerful alternative to Checkra1n jailbreak iOS devices.

finding solutions to checkra1n error 31

Part 1. Figuring Out All Possible Reasons for Checkra1n Error 31

Understanding the reasons behind Checkra1n Windows Error 31 is essential in resolving this issue. The reason can relate to the software and hardware aspects of running Checkra1n. Here are some of the reasons why you are encountering Checkra1n error 31:

  1. Temporary Computer Issues: As Checkra1n is a computer-based tool, issues within your computer can cause the error code 31. These issues can be insufficient resources, compatibility issues, or temporary glitches.
  2. Mismatched Checkra1n Version: When jailbreaking an iOS device, you must use the right version of the tool. Using incompatible versions of Checkra1n can lead to issues such as error code 31.
  3. Issues with USB Connection: A major cause behind Checkra1n error 31is the unstable or faulty USB connections. If your device is not properly connected, it will lead to the failure of the jailbreak process.
  4. **Device Compatibility Issues:**Apple has introduced many measures to ensure that newer devices are hard to jailbreak. That’s why if you use the latest iOS device, there is a high chance it is incompatible with Checkra1n.
  5. **Security Software Interference:**In rare cases, the security or antivirus software installed on your system can interfere with the working of Checkra1n. Similarly, the Windows firewall can sometimes flag Checkra1n as a virus, disturbing the jailbreaking process.

Part 2: [Top Fixes] Resolve Checkra1n Error 31 to Jailbreak iOS Device

Encountering errors like Checkra1n jailbreak Error 31 is a typical occurrence in the jailbreaking process. Fortunately, there’s no cause for concern, as there are various solutions readily accessible to diagnose and address this particular error. Discussed below are the top 6 fixes to streamline your iOS jailbreaking process:

Fix 1. Wondershare Dr.Fone – Screen Unlock (iOS) Providing a Direct Jailbreaking Solution

While Checkra1n is widely employed for jailbreaking iOS devices, it has notable limitations. This is especially the case concerning compatibility with the latest iOS versions. Therefore, we recommend considering a dependable alternative like Wondershare Dr.Fone. It offers iOS users a user-friendly approach to conducting jailbreaks on their devices.

Working as a dependable companion for iPhone users, Dr.Fone simplifies the jailbreaking process. It especially benefits users grappling with iOS security locks, particularly iCloud activation locks. Notably, Dr.Fone stands out for its compatibility with the latest iOS 17 and iPhone 15 models.

Prominent Features of Wondershare Dr.Fone

  1. You can bypass all sorts of iOS screen locks, from passcodes to Face IDs.
  2. Besides unlocking iCloud Activation Lock, it is also an expert in removing SIM locksfrom the carriers.
  3. If you have forgotten your iTunes backup encryption password, Dr.Fone can remove it without causing data loss.

Steps To Bypass iCloud Activation Lock via Wondershare Dr.Fone

By combining Dr.Fone with the jailbreaking process, users can effectively bypass the iCloud Activation Lock. Detailed instructions are provided below to bypass the iCloud Activation Lock bypass using Dr.Fone:

  • Step 1. Commence the Procedure by Activating Dr.Fone

Start by downloading and opening the latest edition of Wondershare Dr.Fone. After completing this step, go to the “Toolbox” section within Dr.Fone and click “Screen Unlock.” Choose “iOS” as your device type, and head to select the “iCloud Activation Lock Removal” option. Now, begin the procedure by selecting “Start” and ensure your device remains connected to the computer throughout this stage.

proceed with icloud activation lock removal

  • Step 2. Jailbreak Your iOS Device

Now, proceed to check if your device is CDMA or GSM. A GSM device will remain the same after iCloud Activation Lock removal. On the other hand, a CDMA device will lose all cellular functionalities. After that, you need to tap “Unlock Now” and agree with the warning by tapping “Got it!” Afterward, you will need to jailbreak your device, for which follow these below-given steps:

start activation lock unlock process

  1. On a computer with Windows 7 or higher, download checkn1x-amd64.iso and rufus.exe. Connect a USB with at least 2 GB storage to the computer. Next, open the Rufus file and choose “checkn1x-amd64.iso” by clicking “Select.”

boot device with checkn1x

  1. Now, click “Start,” and on the pop-up window, choose “Write in DD Image Mode.” Then, click “OK” and wait for the process of writing image data to complete. Once completed, tap “Close” and restart your computer with the USB plug-in.

select dd image mode for writing

  1. Press the F12 or relative boot key to access the Boot Menu when the computer restarts. Within the “Boot Menu,” choose the USB and connect your iOS device to the computer. Now, use the arrow keys to move to the “Options” button and press Enter.

navigate to options boot menu

  1. You must now move to the “Allow untested iOS/iPadOS/tvOS versions” option and hit “Enter.” Follow it by moving to the “Skip All BPR Check” option and pressing “Enter” again. Afterward, move to the “Back” option and use “Enter” to return to the main screen.

set required boot options

  1. Once back on the main screen, select “Start” to initiate jailbreaking. For CheckN1x to jailbreak your device, you need to put the Apple iPhone 15 Plus device into DFU Mode. Now, tap “Next” to put your device into Recovery Mode.

start jailbreaking device

  1. Once your device is in Recovery Mode, tap “Start” and follow the on-screen guidelines to put it into DFU Mode. When your device enters DFU Mode, Checkn1x will automatically jailbreak it. Finally, select “Finish” and remove the USB to complete the process.

put device into recovery mode

  • Step 3. Complete the iOS Activation Lock Bypass Process

Removing the Activation Lock will start as soon as your device is jailbroken. You can follow the progress on the screen, and once it is complete, tap “Done” to conclude the process.

icloud activation lock bypassed

Fix 2. Try Restarting iOS or Computer Device

Sometimes, temporary glitches or bugs within your iOS device or computer can cause the Checkra1n Error 31. The most effective and simple solution in this case is to restart your devices. This simple process removes all temporary glitches and resets all processes. Here is how you can restart your iOS device and computer:

1. Windows PC

Instructions. Click the “Start” button on your Windows PC from the bottom left corner. Here, tap the “Power” icon and select “Restart.”

restart windows pc

2. MacBook

Instructions. When using a Mac, click the “Apple” logo from the top left corner. Press “Restart” from the drop-down menu to reboot your Mac.

restart macbook quickly

3. iPhone/iPad

Instructions. Press the “Side” and any “Volume” buttons to access the Power Slider screen. Now, move the slider to the right to turn off your device. After waiting some time, press the “Side” button to turn on your iOS device.

switch off and restart iphone

Fix 3. Download New Checkra1n Version

Crucial for a successful jailbreak is carefully selecting the appropriate Checkra1n version. Compatibility varies across devices, making it essential to choose the version that suits your device. Error 31 issues are likely linked to the specific Checkra1n version in use. In such instances, the recommended solution is to experiment with alternative versions.

checkra1n latest version

Fix 4. Install iOS Firmware From iTunes and Retry Jailbreaking

When encountering Checkra1n jailbreak, error 31 may be attributed to the iOS version on your device. In such cases, the optimal resolution involves reinstalling the iOS version through iTunes. Follow the steps below to personally choose the IPSW file and employ iTunes for the installation on your iOS device:

  • Step 1. Access the ipsw.me website using a web browser and download the compatible IPSW file for your iOS device. Before installing, ensure that the “Find My” service is disabled.

disable find my on iphone

  • Step 2. Connect the iOS device to the computer and wait for iTunes/Finder to detect it once all requirements are satisfied. For instance, if you have a Mac with the operating system before macOS Catalina, access the “Summary” tab by clicking the Apple iPhone 15 Plus device icon within iTunes. While holding the “Shift” key on Windows or the “Option” key on Mac, click “Restore iPhone.”

restore iphone via itunes

  • Step 3. You will be asked to select the IPSW file. Choose the file you downloaded and follow the on-screen instructions to complete the installation process. Once complete, re-try the jailbreaking and see if error 31 is resolved.

access file to complete installation process

Fix 5. Consider Using Other Options in Checkra1n

If the reason behind Checkra1n error 31 is the Apple iPhone 15 Plus device incompatibility, Checkra1n provides an inbuilt way. When jailbreaking a device, Checkra1n allows you to select the “Untested versions” option. While employing this option, you can jailbreak the Apple iPhone 15 Plus device with iOS versions still not tested for jailbreaking. Here is how you can select these options in an attempt to jailbreak your device:

Instructions. To get a clean start, reboot your computer and iOS device and launch the Checkra1n app. Now, click the “Options” and select the “Untested Versions” and “Safe Mode” options. Then, try jailbreaking your device and see if error 31 is resolved.

enable safe mode and untested versions

Fix 6. Try a Special Method While Using Checkra1n

At times, the solutions you are looking for can be found among the experiences of fellow users. We found a Reddit post in our search to find solutions to Checkra1n Error 31. In this post, a Reddit user explained a hack he had found to solve error 31 when jailbreaking using Checkra1n.

Remember that this hack includes a specific Checkra1n version and experience that specific user. While you can emulate the experience, the results aren’t guaranteed. Here is what that user tried for successful jailbreaking using Checkra1n:

  • Step 1. Download and install the Checkra1n version 0.10.2 beta on your computer. Now, connect your Apple iPhone 15 Plus to DFU Mode to the system. Initiate the jailbreaking process until the “Right before Trigger” option appears.

reach right before trigger screen

  • Step 2. The user suggests you unplug the cable and re-plug it after waiting for 5 to 7 seconds. According to the user, this action should do the trick. To get out of DFU Mode, press and hold both buttons (Home + Lock) for 10 seconds and go on to release the home button.

exit dfu mode iphone

Bonus. Jailbreak iOS Using Mac: A Simple Guide To Refer To

Looking for a tool to jailbreak an iOS device on a Mac? Wondershare Dr.Fone has you covered there, as it also provides a comprehensive guide to jailbreaking an iOS device from Mac. You will need to download the Checkra1n tool and a USB cable to connect your Apple iPhone 15 Plus. Once you have both, use the following steps to jailbreak your device from Mac:

  • Step 1. Begin by downloading the .dmg file of Checkra1n and installing it within your Mac’s applications. Now, link your iOS device to the Mac and go to Applications, click “Checkra1n,” and access “Contents.”

access checkra1n on mac

  • Step 2. Tap “macOS” and go to “Checkra1n_gui Terminal file” to detect the Apple iPhone 15 Plus device. Now, move ahead by tapping “Start,” you will be led to the screen with instructions for putting the Apple iPhone 15 Plus device into DFU Mode.

use checkra1n to detect device

  • Step 3. Tap “Next,” put your device into DFU Mode, and press “Start.” Once the Apple iPhone 15 Plus device is in DFU Mode, the jailbreaking process will commence. When it is complete, and your device is jailbroken, tap “Done” to conclude the process.

commence jailbreaking process

Conclusion

In wrapping up this guide, those seeking to customize their iOS devices can turn to jailbreak. Checkra1n stands out as a favored option for this procedure, but dealing with Checkra1n Error 31 can be an irritating ordeal. The optimal solution is opting for an alternative, such as Wondershare Dr.Fone. This tool offers comprehensive textual and video guides, aiding users in successful jailbreaks.

Tips: Are you searching for a powerful Activation bypass tool? No worries as Dr.Fone is here to help you. Download it and start a seamless unlock experience!

How To Bypass Activation Lock On Apple Watch Or Apple iPhone 15 Plus?

You can use Apple Watch Or Apple iPhone 15 Plus to track your daily jog and much more. The small device can contain as many features as the iPhone, making it a necessity in addition to an accessory. The watch can call, play music, have a calendar, and contain many apps. However, it has an activation lock.

It’s likely the previous owner put an activation lock on the watch. Due to that issue, you can no longer use the watch. Resellers or former users sometimes fail to remove or unpair their devices. It creates a challenge for the user, whose doubts about theft add to their concern.

A bypass activation lock is the only convenient way for quick unlocking. It is a legal and safe way to retrieve the Apple Watch Or Apple iPhone 15 Plus from the activation lock. So, read how to bypass the activation lock on the Apple Watch Or Apple iPhone 15 Plus.

Part 1: Is the activation lock enabled on my Apple Watch Or Apple iPhone 15 Plus?

You must first check if the activation lock is enabled on your Apple Watch Or Apple iPhone 15 Plus before you know how to bypass it. The process of enabling or disabling activation is a piece of cake.

The activation lock will be enabled when you set up ‘Find My iPhone’ on your paired phone with the watch. It will automatically turn on.

The activation lock helps secure your watch if lost or stolen. No unknown identity can use your watch or derive your personal information through this lock. All you need to do is remember your Apple ID and passcode.

Here are simple steps to check if the activation lock is enabled on your Apple Watch Or Apple iPhone 15 Plus:

apple watch activation lock bypass 2022

  1. Go to your Settings.
  2. Please search for the Watch app and tap on it.
  3. Tap on the My Watch tab.
  4. At the top of the screen display is ‘All Watches’, tap it.
  5. You’ll find an info button on your paired Apple Watch Or Apple iPhone 15 Pluses.

The activation lock is on if you see ‘Find My Apple Watch Or Apple iPhone 15 Plus’. If not, then the lock is disabled.

Part 2: Three Ways To Bypass The Activation Lock On The Apple Watch Or Apple iPhone 15 Plus

1. Bypass Activation Lock With the Previous Device Owner

Troubleshoots a device that a previous owner has locked after selling it. It becomes difficult for the buyer to unpair the Apple Watch Or Apple iPhone 15 Plus to use it. You won’t have to worry about that. We looked at all the solutions to bypass the Apple Watch Or Apple iPhone 15 Plus activator lock in legal and safe ways. A quick way with brief instructions for you to achieve Apple Watch Or Apple iPhone 15 Plus activation.

This particular step requires the presence of the previous owner. Reach out to the previous Apple Watch Or Apple iPhone 15 Plus owner and remove their device/ devices from their Apple ID.

Make sure the previous owner reset their iCloud or follow these steps.

Step 1: Sign in to iCloud.com.

Step2: Click on ‘Find iPhone’.

apple watch activation lock bypass free

Step 3: You’ll see ‘All Devices’ at the top bar. You can view the list of devices linked to their account by clicking on that. All devices associated with the iCloud account will be listed in the list.

remove activation lock on apple watch

Step 4: Scan the Apple iPhone 15 Plus devices you want to delete, then click the Remove button.

Step 5: A webpage will pop up once you click the particular device. This page will show you a few options for the Apple iPhone 15 Plus device. Click ‘Remove From Account’ to dissociate it from the iCloud account.

remove from account

This way, the previous owner will remove all their paired devices from the iCloud account. The Apple Watch Or Apple iPhone 15 Plus activation can now be easily performed and paired with your device/ iPhone.

2. Apple iPhone Unlock

The second most convenient and easy way to bypass the activation lock on the Apple Watch Or Apple iPhone 15 Plus is through the Apple iPhone Unlock app. It provides you with convinced and satisfied delivery within 24 hours and has a highly skilled tech team to assist you with the process. They master unlocking IOS phones, mostly. Though, they charge you $19.99 to disable the activation lock. It’s an online service.

Here are a few steps on how to bypass the Apple Watch Or Apple iPhone 15 Plus activation lock:

Step 1: Go to the Apple iPhone Unlock website, and a purple page will appear.

apple id lock on apple watch

Step 2: Go through the site and direct yourself to the iCloud Activation Unlock page.

Step 3: Next, you’ll be asked to fill out the Apple iPhone 15 Plus device’s IMEI number.

apple watch locked to owner

Step 4: Carefully fill out the details. Next, pay the necessary payment on the Apple iPhone Unlock website and get your Apple iPhone 15 Plus unlocked.

3. IMEI unlock sim

Regarding Apple iPhone Unlock, IMEI Unlock Sim is the best alternative. They have the best solution for your issue. At a convenient cost, they can easily disable/unlock the Apple Watch Or Apple iPhone 15 Plus for you without any difficulties. The steps are straightforward, follow these, and you’ll unlock your watch.

Step 1: Search for IMEI Unlock Sim on Google, and their website will show.

Step 2: Click on the first link to see this homepage.

apple watch locked to owner forgot password

Step 3: Launch the iCloud removal service page from the Main Menu. Select your device and device model and input its IMEI number.

apple watch activation lock removal service

Step 4: Click on ‘Unlock Now’ to proceed with the payment procedure.

activation lock apple

Step 5: Once your payment is processed, within 1–5 days, the tech team will work on your issue to remove the activation lock.

These are all basic and easy methods for unlocking your Apple Watch Or Apple iPhone 15 Plus. Using one of these methods will unlock your Apple Watch Or Apple iPhone 15 Plus safely and effectively.

Part 3: Unlock Activation Lock On iPhone/iPad/iPod Touch

Have you ever forgotten your lock screen password when you accidentally locked your Apple iPhone 15 Plus or iPad after too many wrong attempts? There’s no need to worry. You could try Dr.Fone - Screen Unlock (iOS) for a hassle-free way to unlock your activation lock.

second hand apple watch activation lock

Here is a video for you to learn how to how to iOS/iPadOS activation lock bypass

Safe downloadsafe & secure

You’ll be able to use the phone call and iCloud of your new Apple ID after bypassing the iCloud lock.

Conclusion

To unlock or Apple Watch Or Apple iPhone 15 Plus activation can be tiresome, but now it isn’t anymore. It might’ve been quite annoying that your Apple watches won’t pair with your device, but that won’t happen anymore. Now, you know how to bypass the Apple Watch Or Apple iPhone 15 Plus activation lock.

Luckily, Wondershare Dr.Fone - Screen Unlock (iOS) is an ultimate, simple, convenient lock-screen removal tool. This easy tool lets you bypass your lock screen in just a few minutes. All in all, this particular tool is compatible with IOS devices and completely safe to use.

How to Bypass Activation Lock on Apple iPhone 15 Plus or iPad?

Apple has long been famous for providing sound devices, with nifty safety and user-friendly features. With that said, if you just purchased a used iOS device, you may be required to bypass the activation lock on your device using iCloud, or the previous user’s account. Before we take a look at how to bypass an activation lock on an Apple iPhone 15 Plus or iPad, let’s examine what an activation lock on an Apple iPhone 15 Plus or iPad entails.

bypass activation lock

Part 1. What is Activation Lock on Apple iPhone 15 Plus or iPad?

This theft deterrent feature is cool for the sole reason that it helps keep your data safe, in case of misplacement or thievery. Without access to the owner’s Apple ID and/or password, accessing the Apple iPhone 15 Plus device becomes impossible. Unfortunately for used purchases, you may have procured a used item legitimately, but have no access to said device.

This feature is enabled by default when the Find My Apple iPhone 15 Plus option is selected on an iOS device. It is necessary when a user needs to erase data on an iOS device, set it up using a new Apple ID, or turn off Find My Apple iPhone 15 Plus. Knowing the activation lock is enabled on an Apple iPhone 15 Plus or iPad is easy, as the screen prompts you to input a user ID and password.

Part 2. How to Bypass Activation Lock on Apple iPhone 15 Plus or iPad with Previous Owner’s Account?

Using a valid Apple ID and password is the easiest way to bypass the activation lock on Apple iPhone 15 Plus or iPad Mini. In any case, if you legitimately purchased the Apple iPhone 15 Plus device from the previous owner, they should have no qualms giving you these details. If it’s a new device, and you are the original owner, you will have this information ready to use for activation. Whatever the case, follow the steps below to remove the activation lock to Apple iPhone 15 Plus or iPad Mini.

add apple id password

  • Step 1. Have the previous owner enter their details on the Apple iPhone 15 Plus or iPad Mini, or request them to send the same to you.
  • Step 2. Fire up the Apple iPhone 15 Plus device and when prompted on the Activation Lock Screen, enter the Apple ID and password.
  • Step 3. Within a few minutes, the home screen should appear on the Apple iPhone 15 Plus or iPad.
  • Step 4. Upon reaching this page, navigate to the settings tab to sign out of iCloud.

A note for users before we proceed with the bypass steps:
Users on iOS 12 or earlier can locate this option on settings, navigating to iCloud, then signing out. For iOS 13 or later, click on settings, then your name, and sign out.

  • Step 5. Chances are, the Apple iPhone 15 Plus or iPad will prompt you to enter the original user’s ID and Password. Simply enter the details available to you.
  • Step 6. Finally, the best part of the unlocking process; navigate to the settings tab to erase all data. Open up settings, click reset and proceed to erase all content, including settings.
  • Step 7. At this point, your Apple iPhone 15 Plus or iPad will restart/reboot, allowing you to set up the Apple iPhone 15 Plus device anew.

There are a few web-based resources and tricks that facilitate this procedure. Suffice to say, these methods, known as Jailbreaking, do not work when activation lock is enabled. Stick to using credible methods like the one listed above. Alternatively, you can use iCloud to bypass the Apple iPhone 15 Plus or iPad Mini activation lock. It does, however, require the original owner’s iCloud information. Assuming they are in contact with you, have them use the following steps to bypass the activation lock.

Part 3. How to Remove iCloud Activation Lock on Apple iPhone 15 Plus or iPad Without Password Using Dr.Fone?

This cool software program is available for use with every iOS device out there. It offers utility for all matters security, revamping or repairing as well as unlocking of iOS devices. On removing Apple ID and activation lock without a password, Dr.Fone - Screen Unlock (iOS) is one of the few recommended programs.

Dr.Fone - Screen Unlock (iOS)

Remove Activation Lock from iPhone/Apple iPhone 15 Plus or iPad without Password

  • Remove the 4-digit/6-digit passcode, Touch ID, and Face ID.
  • Bypass iCloud activation lock and Apple ID without password.
  • Remove mobile device management (MDM) iPhone.
  • A few clicks and the iOS lock screen is gone.
  • Fully compatible with all iOS device models and iOS versions.

4,395,216 people have downloaded it

Follow the guide to remove activation lock on Apple iPhone 15 Plus or iPad without a password:

  • Step 1. Click the “Start Download” button above to Download Dr.Fone onto your computer. Once the interface pops up, select the Screen Unlock option.
  • Step 2. Then select iCloud Activation Lock Removal.

remove icloud activation lock

  • Step 3. Start the Remove process, and connect your Apple iPhone 15 Plus or iPad to your computer.

unlock icloud activation - jailbreak iOS

  • Step 6. Wait a moment for the removal process.

unlock icloud activation - start to unlock

Part 4. How to Bypass Apple iPhone 15 Plus or iPad Mini Activation Lock Using iCloud.com?

  • Step 1. The original user (or yourself) should proceed to iCloud and sign in using a valid Apple ID and password. Goes without saying that they have to be valid details.
  • Step 2. Click on the option to Find iPhone.
  • Step 3. Select All Devices, and a screen should appear similar to the one below.

select all devices

  • Step 4. Select the Apple iPhone 15 Plus or iPad Mini that you need to unlock.
  • Step 5. Click on the option to erase the Apple iPhone 15 Plus or iPad, then proceed to remove the Apple iPhone 15 Plus device from the account.
  • Step 6. Completing this process will remove the Apple iPhone 15 Plus device from the previous user’s account, subsequently removing the activation lock from your Apple iPhone 15 Plus or iPad. Restart the Apple iPhone 15 Plus device and a different interface should appear, without the activation lock screen.

A popular query regarding the activation lock on an Apple iPhone 15 Plus or iPad Mini is why access is denied if you are not the original owner? This is explained in detail below.

Conclusion

Having an iOS device is a unique and satisfying experience, one that many smart device users wish they could have. On that note, activation locks on Apple iPhone 15 Plus or iPads and other iOS devices are meant to protect user information and ensure privacy. Furthermore, using shady programs downloaded from the web may lead to the destruction of a device. Use the handy methods suggested above to fully enjoy the features on your iOS device.


Also read:

  • Title: In 2024, Effective Ways To Fix Checkra1n Error 31 On Apple iPhone 15 Plus
  • Author: Lydia
  • Created at : 2024-04-08 06:25:41
  • Updated at : 2024-04-09 06:25:41
  • Link: https://activate-lock.techidaily.com/in-2024-effective-ways-to-fix-checkra1n-error-31-on-apple-iphone-15-plus-by-drfone-ios/
  • License: This work is licensed under CC BY-NC-SA 4.0.
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In 2024, Effective Ways To Fix Checkra1n Error 31 On Apple iPhone 15 Plus