Find out your device’s UDID

So you need to find out your device’s Unique Device Identifier (UDID).

Every device launched by Apple in the past 3 years – starting with the original iPhone – has an Unique Device Identifier. The UDID is a sequence of 40 letters and numbers.

Say you’re a beta customer and you want a preview of some app before it hits the App Store. The only way you can do that is if the app’s developer makes a custom build of the application especially for your device. But for him to be able to do that, he first needs to register your device with Apple. As UDIDs are unique, they’re perfect for this task.

There are 2 ways you can find out your device’s UDID:

1. Install and run the Ad Hoc Helper app on your device. It will create an email with your UDID which you can easily send to the developer.
2. Retrieve it manually using iTunes.
1. Fire up iTunes and connect your device.
2. In iTunes’ left pane, right above the playlists you should find your device under the DEVICES section. Select it.
3. In the right pane you should now be able to see information about your device such as it’s name, capacity, software version and serial number.
4. Click the Serial Numberlabel. The text will change to Identifier (UDID).
5. Press Command+C (or Control+C on Windows) to copy the UDID to clipboard.
6. Paste the UDID anywhere you like.