(USB-A to Lightning works best; USB-C to Lightning cables often fail to enter DFU mode).

A USB flash drive (at least 4GB capacity). This drive will be formatted, so back up any files on it first.

Did the process fail during the or during the system boot phase ?

Absolutely. The iPhone 5s (A7 chip) is the most stable device for Checkra1n. The jailbreak is nearly 100% reliable.

After scouring the internet, Alex found a reputable source that offered a Windows version of checkra1n. The website provided a download link, and Alex quickly clicked on it to begin the download process. The file was relatively small, and it didn't take long for it to finish downloading.

, iPhone 6, iPhone 6 Plus, iPad Mini 2, iPad Mini 3, and iPad Air 1.

If you are holding an older device running iOS 12.5.5—likely an iPhone 5s, iPhone 6, or iPad Air 1—you are in a unique position. iOS 12.5.5 is a security update for 32-bit devices that are incompatible with iOS 13 and later. It is widely considered one of the most stable versions of iOS for older hardware.

Connect your iPhone to the computer using a Lightning cable.

If the Linux USB method sounds too technical, consider these options:

Under , click the SELECT button and choose the Checkra1n/Odysseyn1n .iso file you just downloaded. Leave all other settings at their defaults and click START .