In the process of iOS 8.1.3-iOS 8.3 jailbreak, if jailbreak failed and error messages appear, you can follow instructions below for the meanings of codes and solutions.

【 -1001 device disconnected】

It means your iDevice is disconnected from the computer during jailbreak. Don't do anything on your iDevice during jailbreak and keep it plugged in. Use certified cables. 

【 -1002 device with passcode on】

It means passcode on your iDevice is turned on. To turn it off, go to Settings > Passcode. 

【-1003 program data corrupted】

Re-download the jailbreak tool, and make sure you have a good internet connection.

【-1004 Three conditions of jailbreak failure】

It can be divided into 3 different situations:

# -1103 program data corrupted

It was caused by computer. Please try on another computer. If jailbreak is stuck at 30%, firstly check whether background programs are preempting CPU resources by observing task manager on the computer. You can reboot the device to confirm. Secondly, change USB on the computer and USB cable connecting iDevice and the computer.

# -1004 Three conditions of jailbreak failure

It was caused by computer. Please try on another computer. If jailbreak is stuck at 40%, firstly check whether background programs are preempting CPU resources by observing task manager on the computer. You can reboot the device to confirm. Secondly, change USB on the computer and USB cable connecting iDevice and the computer. 

 # -1105 it may be caused by antivirus software

If the jailbreak is stuck at 50%, it may be caused by antivirus software. Please try after turning off it. 

【-1005 Find My iPhone turned on】

To turn off Find My iPhone, go to Settings > iCloud. 

【-1006 jailbroken device】

Your iDevice has been jailbroken.

【-1007 device not activated】

Activate your iDevice before jailbreak.