How to find UDID
※Use "Ad Hoc Helper"
You can email UDID with this tool.

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※Use iTunes
・You can display UDID of your iPhone/iPod touch by click the following area in iPhone/iPod touch's preference screen. You can copy UDID with Ctrl+C after click there.
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How to install
※Expand
If app is zipped, you have to expand it. There are some unrelated files whose name begin from "_.", but you should ignore such files.
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※Install via iTunes
Select 2 files, hoge.app，hoge.mobileprovision simultaneously and then drag and drop these 2 files into iTunes's application library.
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※Confirmation
Following icon is shown in iTunes's application library when your installation is successed.
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※Uhh... I can't install it....
Because...?
１．Provisioning file has some problems.
２．Don't you exchange/get new iPhone after you inform your UDID to developer.
３．Provisioning file has broken.