(Official Release) Download checkra1n Jailbreak iOS 15.4.1/ 15.5 Devices on Windows PC
Download checkra1n Jailbreak Prerequisites
Before you can jailbreak with checkra1n, you’ll need to know a few prerequisites: This method is to use checkra1n on Windows PC with a checkra1n jailbreak USB drive created by Cocosenor iBypass Tuner. You just need to create an OS 15.4.1/ 15.5 Device jailbreak USB drive with Cocosenor iBypass Tuner in a few clicks. Then boot your computer boot from the USB drive and follow the instructions to jailbreak your iOS device.
Cydia Install iOS 15.4.1 CoolStar ‘It is Looking Good’
- The tool is only available for macOS and Linux at this time (support for Windows is coming soon)
- The tool is semi-tethered, which means you’ll need a computer to boot jailbroken if you power off
- The tool supports 64-bit A5-A11-A13-A14-A15 devices from the iPhone 5s to the iPhone 13 Pro Max with the exception of a few: iPad Air 2, iPad (5th generation), and iPad Pro (1st generation).
- Your device must be running iOS 12.0 or later
- The tool is experimental on the following handsets: iPhone 5s, iPad mini 2, iPad mini 3, iPad Air
- Cydia is installed by default, but other package managers will be optional in the future
The iCloud Unlock iOS 15.2 and iOS 15.3 / iOS 15.3.1 / iOS 15.4 / iOS 15.4.1 / iOS 15.5 and Beta is supported for the iPhone 13, iPhone 13 Mini, iPhone 13 Pro Max, iPhone 13 Max, iPhone 12 Mini, iPhone 12 Pro Max, iPhone SE 2, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone XS Max, iPhone XS, iPhone X, iPhone XR, latest iPads, latest, iPod and Apple Watch series.
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Bypass iCloud GSM | Bypass iCloud Meid | Bypass Carrier (GSM) | Open menu iPhone to 13 pro max | FMI Off Password: 6s to 13 pro max
While you are doing this process, the iDevice has to face a number of issues, simply the iOS 15.3 – iOS 15.4 to iOS 15.4.1 jailbreak process is a risky process for the iDevice. The iCloud Bypass method with the IMEI number process doesn’t need any jailbreak process to start the iCloud Bypass process.
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iCloud Bypass iOS 15.5
Checkra1n is the only semi-tethered tool that is supported to jailbreak iOS 15.4 / iOS 15.4.1 / iOS 15.5 and Beta running iPhone 6S – iPhone 13 Pro Max Models.
Checkra1n confirms the latest iOS 15.2.1 Jailbreak compatibility as well.
Use checkra1n to jailbreak iOS devices – Download checkra1n Jailbreak
Step 1: Launch checkra1n.

Step 2: Connect iDevices to the computer. After checkra1n detect the device, click Start.

Step 3: Follow the instructions on the following page to get the iOS device entered DFU mode.

Step 4: Once the device has entered DFU mode successfully, checkra1n will move on to the next process automatically. From now on, all you need to do is just waiting until it is all done.

The iOS device is now successfully jailbroken.