How to find your UDID
To get a test version of an app by email it must be cryptographically signed for your device. For this purpose your device’s UDID is needed. You can find it by connecting your phone to iTunes. Then click the “Serial Number” field:
A new field, “Identifier (UDID)” should appear. Press CTRL-C/⌘-C to copy the UDID to your clipboard from where you can paste it into an email:
