Is there anything wrong with giving out your udid?

There's a developer very legit that wIll register my iphone for ios 7.1 beta 3. I know they can get access to apps and things especially third party apps but far as things like my phone number and data plan can they like run up my bill or something or get access to my sprint account

UDID's or Unique Device IDentifiers are asked for by developers for beta testing, as it allows them to build a profile of the application which will only function and successfully launch on your device. To find your UDID, plug-in your device, and on the iTunes 'Summary' tab, click 'Serial Number'. The data will change to show the field 'Identifier'. This is the number you are being asked for.

Alternatively you can use 'UDID' from the App Store.

Your UDID is perfectly safe to share with anyone.
It can't be used maliciously, in any way.

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