Finding iPhone UDID String

During the beta testing phase, it is often necessary to send versions of a new App directly to clients and testers. To do this the developer generates an Ad Hoc provisioning profile that functions as an authorization to install the App on a given device. When the developer compiles the App code, the provisioning profile is referenced and only those devices which are included on the profile will be able to use the App.

In order to add a device to a provisioning profile, the developer needs the Unique Device Identifier [UDID] for each iPhone, iPod, or iPad. This requires that the device owner locates the UDID and sends it to the developer. Fortunately, finding the UDID is easy!

To find your UDID follow these steps:

1. Plug in your device and let it sync with iTunes
2. Highlight your device under 'Devices' in the left column of iTunes
3. Click to the 'Summary' tab at the top to reveal information about your device
4. In the top portion you should find listed next to the tab Identifier (UDID):.
5. If instead you see Serial Number: click on 'Serial Number' to toggle it to UDID
6. Cut and paste the UDID, and send it to the developer

Please click on the image to see a larger version with annotations for finding your UDID.

In the end, your UDID should look something like: 54fa5f4b42c671a04e24e19d6f42acd20fe22adf

That's it!