1. Open iTunes and plug in your device.
2. Select your device in the sources column or in the iTunes top toolbar.
3. Click on the Serial Number for your device to reveal the UDID. Now press Ctrl-C (Cmd-C on a Mac) to copy the UDID to your clipboard. This can now be pasted in to an email or anywhere else.
That’s it! We hope this guide has helped. Please get in touch should you have any questions.