How to Jailbreak iPhone 7 (iOS 15.8.3) Using Windows
Introduction : In this guide I share exactly how I jailbroke my own iPhone 7 on iOS 15.8.3 using only Windows, a USB drive and free tools. Before the steps, I will first explain which type of jailbreak this is, so you know what to expect.
Types of Jailbreaks : Not all jailbreaks behave the same way. The main difference is what happens when you restart your phone. There are four types:
1. Untethered
The phone restarts and is still jailbroken. Nothing to do. This is rare today. It was common on very old iOS versions.
2. Semi-untethered
After a reboot, the phone starts in normal (non-jailbroken) mode. You re-enable the jailbreak by tapping an app on the phone itself, so no computer is needed. Examples: unc0ver, Taurine, Dopamine.
3. Semi-tethered
After a reboot, the phone starts in normal (non-jailbroken) mode. You must connect it to a computer to re-enable the jailbreak. Examples: checkra1n, palera1n.
4. Tethered
After a reboot, the phone will not boot properly (it gets stuck on the logo or in recovery) until a computer boots it. This is the most inconvenient type.Which Type Is This?
The method used in this guide:
- Type: Semi-tethered jailbreak
- Exploit: checkm8 (a bootrom exploit in the A10 chip)
- Tool: palera1n v2.4, run from a bootable USB (palen1x) on Windows
- Mode: Rootless (
palera1n -l) - Device: iPhone 7 on iOS 15.8.3
What “semi-tethered” means for you: the jailbreak works only until the phone restarts. After a reboot or a dead battery, the iPhone starts in normal mode. To get the jailbreak back, you repeat the same process with the USB drive. Your data and apps are not lost, but tweaks stop working until you re-jailbreak.
Rootful vs. rootless in one minute
When you run palera1n, it asks you to choose between rootful (-f) and rootless (-l). In simple terms, rootless is the lighter, more modern option, because it keeps the main system files untouched and stores the jailbreak files in a separate place. Rootful makes deeper changes to the file system. I used rootless. Some older tweaks only work in rootful mode, so check what you want to install first.
What You Need
- iPhone 7 (mine was on iOS 15.8.3)
- Windows (64-bit; mine was an HP)
- USB flash drive (it will be erased; mine was 64 GB)
- palera1n USB image from https://palera.in/download/?tab=windows
- Rufus from https://rufus.ie/en/
- A good-quality Lightning cable
Part 1: Prepare the Bootable USB
Step 1: Download the palera1n USB image
Open the palera.in download page and select the Windows tab. Download the ISO for USB drive that matches your PC: x86_64 for a 64-bit computer (most modern PCs) or x86 for 32-bit.
Step 2: Download Rufus
Rufus is a free tool that writes the ISO file to a USB drive and makes it bootable. From rufus.ie, I downloaded the standard Windows x64 version (rufus-4.15.exe). It is a tiny file and needs no installation.https://rufus.ie/en/
Step 3: Select the ISO in Rufus
Plug in your USB drive and open Rufus. Under Device, make sure your USB drive is selected (double-check this, because everything on it will be erased). Click SELECT and choose the palera1n ISO. My settings were: Partition scheme MBR, Target system UEFI (non CSM), File system Large FAT32.
Step 4: Click START and choose the write mode
When you click START, Rufus shows an “ISOHybrid image detected” message. Rufus recommends ISO Image mode, but I selected DD Image mode and clicked OK. If the USB does not boot for you in one mode, try writing it again in the other. Then confirm the warning that the drive will be erased.
Step 5: Wait for READY
Rufus writes the image in a few seconds. When the status bar turns green and shows READY, your bootable palera1n USB is complete. Close Rufus and leave the USB plugged in.
Part 2: Jailbreak the iPhone
Step 6: Boot your PC from the USB
Restart the PC and press your laptop’s boot menu key (it differs by brand, for example F9, F12 or Esc). From the list, choose the USB drive. Mine appeared as an “HP USB Flash Drive” under UEFI.
Step 7: Run palera1n
The USB boots into a small Linux terminal. If you run palera1n with no option, it asks you to choose rootful (-f) or rootless (-l). I ran palera1n -l and it started waiting for my device.
Step 8: Trust the computer
Connect the iPhone with the cable. When the “Trust This Computer?” prompt appears, tap Trust
Step 9: Enter DFU mode
This is the trickiest step. palera1n first puts the phone into recovery mode, then asks you to press Enter when you are ready for DFU mode. Follow the on-screen button timing: hold Volume Down + Side button, then release the Side button while still holding Volume Down. The terminal confirms with “Device entered DFU mode successfully.”
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Do not worry if it fails the first time. Timing matters, and it is normal to need a few tries.
Step 10: Exploit and boot
After DFU mode, the tool runs checkra1n (v0.1337.3), performs the checkm8 exploit and boots PongoOS. When you see “Checkmate!” in the terminal, the exploit worked. The phone then boots into the jailbroken state.
Step 11: Success!
When the iPhone starts, Sileo (the package manager) and the palera1n loader appear on the home screen. That means the jailbreak worked. You can now open Sileo to install tweaks and tools from trusted repositories.
Tips and Troubleshooting
- USB does not show in the boot menu: re-create it in Rufus, try the other write mode (ISO or DD), and make sure the PC is set to boot from USB in UEFI.
- DFU mode keeps failing: try a different cable and a direct USB port on the PC (not a hub). Repeat the button timing calmly.
- Phone stuck in recovery: run the process again from the start. Your data is not erased by this.
- Avoid unnecessary restarts. Each reboot removes the jailbreak (semi-tethered), so keep the battery charged.
- Take a full backup before you begin.
Risks to Know Before You Jailbreak
- Security: jailbreaking weakens iOS protections. Install tweaks only from trusted repos.
- App compatibility: banking and UPI apps, and some games, may refuse to run on a jailbroken phone.
- Stability: crashes, battery drain and boot problems can happen with some tweaks.
- Updates: you cannot update iOS normally without losing the jailbreak.
- Legal: follow the laws of your country, and do not use jailbreaking for piracy.
So that’s a wrap on my blog about jailbreaking the iPhone 7 on Windows. I’ve covered the different types of jailbreaks, what semi-tethered means, and the full step-by-step process. I hope this guide helps those who are new to the field.
Thank you for taking the time to read my blog. Don’t forget to follow me on Medium and LinkedIn.
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Disclaimer: This article is for educational purposes only. Jailbreaking is done at your own risk and may void your warranty.
