However, before proceeding, carefully weigh the benefits against the risks. Jailbreaking remains a rewarding experience for power users who want customization and control, but it's not for everyone. Make that backup. Read the documentation. And when everything works, enjoy the freedom of a fully unlocked iOS device.
If prompted to write in ISO or DD mode, choose and confirm. This process erases all data on the USB drive. Step 2: Boot Your Windows PC into checkn1x Keep the USB drive plugged in and restart your Windows PC.
Jailbreak iOS 12.5.7 on Windows: The Ultimate Step-by-Step Guide
As of my knowledge cutoff in May 2026 and the history of iOS development, iOS version "1257" does not exist. The latest major versions are iOS 17, iOS 18, and early betas of iOS 19. This suggests the user may be referring to a specific build number (e.g., 12.5.7) or a typo. This article will address the most likely interpretation: jailbreaking iOS 12.5.7 (a real, legacy version for older devices) using a Windows computer. jailbreak ios 1257 windows
The device may be old, but a jailbreak breathes new life into it:
A USB flash drive (to create a bootable environment) and the Checkra1n ISO/USB Tool
Only jailbreak your iOS device if you're comfortable with the potential risks and consequences. Regularly back up your device and exercise caution when installing unauthorized apps. Read the documentation
Checkra1n itself was never released as a native Windows application because the exploit requires low-level USB access that Windows kernel drivers are not designed to allow. Checkra1n depends on precise USB timing and direct device interaction that Windows cannot safely provide.
Bootable USB methods are than WinRa1n but offer maximum reliability when other tools fail.
Both Chimera and Unc0ver can be installed on iOS 12.5.7 by sideloading their IPA files using or AltStore on Windows. This process erases all data on the USB drive
Method 2: The Freya Jailbreak (Alternative On-Device Method)
Once your device is jailbroken, a package manager will be installed:
: User-friendly interface; automates much of the technical setup. General Requirements & Tips
Download and install the official desktop version of from the Apple website (do not use the Microsoft Store version, as it lacks necessary drivers).