iOS 12.5.7 falls under the checkm8 bootrom exploit umbrella for supported devices. This means the jailbreak is "tethered" (requiring a computer to boot the device if it restarts) or "semi-tethered," depending on the tool used.
(stable connection is critical). Internet connection on both the PC and the iOS device. jailbreak ios 12.5.7 windows
The tool will automatically run the exploit and install the Checkra1n loader. Method 2: Chimera (Semi-Untethered) iOS 12
: Unlike Checkra1n, which is a "semi-tethered" jailbreak (requiring a PC to boot into a jailbroken state), Chimera is "semi-untethered." If your device restarts, you simply open the Chimera app on your phone and tap "Jailbreak" to re-enable it. jailbreak ios 12.5.7 windows
Breathing New Life into Legacy: Jailbreaking iOS 12.5.7 on Windows