If you have a newer Windows machine and some Linux experience, Palera1n via a bootable USB yields an even cleaner jailbreak. But for most Windows users sticking to native tools, Chimera remains the gold standard for iOS 12.5.7.
Sideload the IPA onto your device and "Trust" the developer profile in Settings > General > Profiles & Device Management Open the Chimera app on your device and tap ⚠️ Important Tips: Backup First: jailbreak ios 1257 windows
(a Windows-native version) or create a bootable USB drive using Checkn1x to run the tool outside of Windows. Package Manager : Installs by default. If you have a newer Windows machine and
A USB flash drive (to create a bootable environment) and the Checkra1n ISO/USB Tool Package Manager : Installs by default
: A popular app-based jailbreak that was updated (v1.6.5) specifically to support iOS 12.5.7.