These are steps I found to recover from this error.
- Turn off your iPhone
- Launch iTunes then.
- Hold down the home button for a short time and reconnect iPhone to your PC.
- iPhone must be detected the phone in recovery mode.
- Try re-installing the IOS through some other computer.
This works normally for most users with error iPhone 1002.
Hopefully useful and leave your comment about "Fix Error 1002 on the iPhone"
