Hello Smith,
Thank-you for your question.
We’re truly sorry for not explaining you this fully.
To get the UDID number follow this steps:
1. Launch iTunes on the mac.
2. Connect iPhone to the mac and verify you can see it in iTunes.
3. Click on the device name in iTunes and make sure you are on the "Summary" tab.
4. Click on the fourth line from the top labeled "Serial Number", this will change to show the UDID.
5. Hover the mouse over the UDID value and click Command+C (You will not be able to highlight the UDID and you won’t get any indication you have performed a copy operation).
6. Use Command+V to paste the UDID.
P.S. See similar answer I’ve posted to RobKites for his question.
Thanks,
Sasha