The UDID is a 40-character string unique to each iPhone/iPod touch. The
UDID is needed for ad-hoc distribution applications. Typically you
will need to e-mail the UDID to the application provider, so they can
generate an ad-hoc mobile profile for your iPhone/iPod touch.
To find your iPhone/iPod touch UDID:- Connect the iPhone/iPod Touch to the computer, iTunes will sync with the iPhone/iPod Touch;
- In iTunes, select your iPhone/iPod touch from the DEVICES list;
- Select the Summary tab;
- In the top section of the window, find and click on the entry labled Serial Number, the entry will change to Identifier and display a 40-character string (the UDID);
- To copy the UDID, open the Edit menu and select Copy (no need to select or highlight the UDID string);
- You can now paste the UDID string in whatever application you need.
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from: http://forum.voxilla.com/rf-support-forum/find-udid-iphone-ipod-touch-33456.html
来自 “ ITPUB博客 ” ,链接:https://blog.itpub.net/29867/viewspace-682762/
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