The search term "justatechcheckra1n0124windows best" refers to a popular method shared by the "Just A Tech" YouTube channel to run the Checkra1n jailbreak (version 0.12.4) on Windows PCs. Because the official Checkra1n website

Open the JustaTech Checkra1n launcher. The interface will look identical to the macOS version. You will see "Start" in the bottom right.

Checkra1n is a hardware-based jailbreak, meaning it leverages the "checkm8" exploit in the bootrom of Apple A7 through A11 devices (iPhone 5s up to iPhone X).

To the outside world, it looked like a string of gibberish. To Elias, it was the "Best"—the holy grail of jailbreaking tools that the community said would never exist for Windows.

Leave the partition scheme as and the target system as BIOS or UEFI to maximize compatibility.

The iPhone’s screen suddenly flashed. Instead of the Apple logo, a wall of verbose text—the "checkra1n" signature—scrolled down the tiny display. Elias held his breath. For thirty seconds, the world was just the hum of his PC fan and the glow of the screen.

Supports jailbreaking up to iOS 14.8.1 on compatible hardware.

to flash the ISO onto a USB drive (selecting either GPT for UEFI or MBR for Legacy).

A: A jailbreak (like Checkra1n) requires you to re-jailbreak your device every time it reboots. An untethered jailbreak persists across reboots without needing a computer. The advantage of semi-tethered is that you can always boot into a non-jailbroken state if you need to use apps that detect jailbreaks (like banking apps).

"DFU mode," it countered. He held the power and volume down keys, counting the seconds like a digital ritual.