If you’re unable to jailbreak the iPhone/iPad/iPod touch, please follow the 2 reliable ways below offered for you make attempts.
If you have downloaded the latest version, there are some other Checkra1n versions you can have a try, please click here.
If not, follow the instructions below:
If you’re prompted to have some error codes which indicates the failure of jailbreaking, please kindly refer to the guide below.
1. Error code: -18If you happen to encounter with interface “Bootstrap upload failed(Error code: 18)”. Just close 4MeKey and run it again to jailbreak your device.
Go back to Checkra1n main interface and click Options > Safe Mode, then jailbreak again.
Uninstall and re-install your iOS with Reiboot and try to jailbreak again.